UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM 10-K
 
(Mark One)
 
      ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
 
For the fiscal year ended December 31, 20192022
 
OR
 
      TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
 
For the transition period from              to             

Commission File

Number
Exact Name of Each Registrant as specified in its

charter; State of Incorporation; Address; and

Telephone Number
IRS Employer

Identification No.
1-8962PINNACLE WEST CAPITAL CORPORATION86-0512431
(an Arizona corporation)
400 North Fifth Street, P.O. Box 53999
PhoenixArizona85072-3999
(602)250-1000
1-4473ARIZONA PUBLIC SERVICE COMPANY86-0011170
(an Arizona corporation)
400 North Fifth Street, P.O. Box 53999
PhoenixArizona85072-3999
(602)250-1000

 
Securities registered pursuant to Section 12(b) of the Act:
Title Of Each ClassTrading SymbolName Of Each Exchange On Which Registered
PINNACLE WEST CAPITAL CORPORATION
Common Stock,

No Par Value
PNWNew York Stock Exchange
 
Securities registered pursuant to Section 12(g) of the Act:
ARIZONA PUBLIC SERVICE COMPANYCommon Stock,, Par Value $2.50 per share
 
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act
PINNACLE WEST CAPITAL CORPORATIONYes
 
No ☐ 
ARIZONA PUBLIC SERVICE COMPANYYes
 
No ☐ 
 
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.
PINNACLE WEST CAPITAL CORPORATIONYesNo
 
No☐ 
ARIZONA PUBLIC SERVICE COMPANYYesNo
 
No☐ 
 
Indicate by check mark whether each registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.
PINNACLE WEST CAPITAL CORPORATIONYes
 
No ☐ 
ARIZONA PUBLIC SERVICE COMPANYYes
 
No ☐ 
 
Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).
PINNACLE WEST CAPITAL CORPORATIONYes
 
No 
 
ARIZONA PUBLIC SERVICE COMPANYYes
 
No 
 
 
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company or an emerging growth company.  See the definitions of "large“large accelerated filer," "accelerated” “accelerated filer," "smaller” “smaller reporting company," and "emerging“emerging growth company"company” in Rule 12b-2 of the Exchange Act.

 PINNACLE WEST CAPITAL CORPORATION
Large accelerated filer
Accelerated filerNon-accelerated filerSmaller reporting company
Large accelerated filer
Accelerated filerNon-accelerated filerSmaller reporting company
Emerging growth company
 
ARIZONA PUBLIC SERVICE COMPANY
Large accelerated filerAccelerated filerNon-accelerated filer
Smaller reporting company
Large accelerated filerAccelerated filerNon-accelerated filer
Smaller reporting company
Emerging growth company
 
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒

Indicate by check mark whether each registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).
PINNACLE WEST CAPITAL CORPORATIONYes  No 
 
ARIZONA PUBLIC SERVICE COMPANYYes    No 
 

State the aggregate market value of the voting and non-voting common equity held by non-affiliates, computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of each registrant’s most recently completed second fiscal quarter:
PINNACLE WEST CAPITAL CORPORATION $10,536,165,750
as of June 30, 2019
ARIZONA PUBLIC SERVICE COMPANY $0
as of June 30, 2019
PINNACLE WEST CAPITAL CORPORATION$8,247,902,707 as of June 30, 2022
ARIZONA PUBLIC SERVICE COMPANY$as of June 30, 2022
 
Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.
PINNACLE WEST CAPITAL CORPORATIONNumber of shares of common stock, no par value, outstanding as of February 14, 2020:21, 2023:112,439,441113,175,507
ARIZONA PUBLIC SERVICE COMPANYNumber of shares of common stock, $2.50 par value, outstanding as of February 14, 2020:21, 2023:71,264,947

 
DOCUMENTS INCORPORATED BY REFERENCE

Portions of Pinnacle West Capital Corporation’s definitive Proxy Statement relating to its Annual Meeting of Shareholders to be held on May 20, 202017, 2023 are incorporated by reference into Part III hereof.
 
Arizona Public Service Company meets the conditions set forth in General Instruction I(1)(a) and (b) of Form 10-K and is therefore filing this form with the reduced disclosure format allowed under that General Instruction.





TABLE OF CONTENTS
 
Page
 
This combined Form 10-K is separately filed by Pinnacle West and APS.  Each registrant is filing on its own behalf all of the information contained in this Form 10-K that relates to such registrant and, where required, its subsidiaries.  Except as stated in the preceding sentence, neither registrant is filing any information that does not relate to such registrant, and therefore makes no representation as to any such information.  The information required with respect to each company is set forth within
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the applicable items.  Item 8 of this report includes Consolidated Financial Statements of Pinnacle West and Consolidated Financial Statements of APS.  Item 8 also includes Combined Notes to Consolidated Financial Statements.

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Table of Contents

GLOSSARY OF NAMES AND TECHNICAL TERMS
4CA4C Acquisition, LLC, a subsidiary of the Company
ACAlternating Current
ACCArizona Corporation Commission
ADEQArizona Department of Environmental Quality
AFUDCAllowance for Funds Used During Construction
ANPPArizona Nuclear Power Project, also known as Palo Verde
APSArizona Public Service Company, a subsidiary of the Company
AROAsset retirement obligations
ASUBARTAccounting Standards Update
BARTBest available retrofit technology
Base Fuel RateThe portion of APS’s retail base rates attributable to fuel and purchased power costs
BCEBright Canyon Energy Corporation, a subsidiary of the Company
CAISOCalifornia Independent System Operator
CCRCoal combustion residuals
ChollaCholla Power Plant
DCCOVID-19Direct Current2019 Novel Coronavirus
DCDirect Current
distributed renewable energy systems or DGSmall-scale renewable energy technologies that are located on customers’ properties, such as rooftop solar systems
DOEUnited States Department of Energy
DOIUnited States Department of the Interior
DSMDemand side management
EESEnergy Efficiency Standard
EGUElectric generating unit
El DoradoEl Dorado Investment Company, a subsidiary of the Company
El PasoEl Paso Electric Company
EPAUnited States Environmental Protection Agency
FERCUnited States Federal Energy Regulatory Commission
Four CornersFour Corners Power Plant
GHGGreenhouse gas
GWhGigawatt-hour, one billion watts per hour
kVKilovolt, one thousand volts
kWhKilowatt-hour, one thousand watts per hour
LFCRLost Fixed Cost Recovery Mechanism
MMBtuMWOne million British Thermal Units
MWMegawatt, one million watts
MWhMegawatt-hour, one million watts per hour
Native LoadRetail and wholesale sales supplied under traditional cost-based rate regulation
Navajo PlantNavajo Generating Station
NERCNorth American Electric Reliability Corporation
NRCUnited States Nuclear Regulatory Commission
NTECNavajo Transitional Energy Company, LLC
OCIOther comprehensive income
OSMOffice of Surface Mining Reclamation and Enforcement
Palo VerdePalo Verde Generating Station or PVGS
Pinnacle WestPinnacle West Capital Corporation (any use of the words “Company,” “we,” and “our” refer to Pinnacle West)
PSAPPAPower supply adjustor approved by the ACC to provide for recovery or refund of variations in actual fuel and purchased power costs compared with the Base Fuel RatePurchase Agreement
RESPSAPower Supply Adjustor
RESArizona Renewable Energy Standard and Tariff
Salt River Project or SRPSalt River Project Agricultural Improvement and Power District
SCESouthern California Edison Company
TCATransmission cost adjustor
TEAMTOUTime of Use
TEAMTax expense adjustor mechanism
VIEVariable interest entity

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FORWARD-LOOKING STATEMENTS
 
This document contains forward-looking statements based on current expectations.  These forward-looking statements are often identified by words such as "estimate," "predict," "may," "believe," "plan," "expect," "require," "intend," "assume," "project"“estimate,” “predict,” “may,” “believe,” “plan,” “expect,” “require,” “intend,” “assume,” “project,” “anticipate,” “goal,” “seek,” “strategy,” “likely,” “should,” “will,” “could,” and similar words.  Because actual results may differ materially from expectations, we caution readers not to place undue reliance on these statements.  A number of factors could cause future results to differ materially from historical results, or from outcomes currently expected or sought by Pinnacle West or APS.  In addition to the Risk Factors described in Item 1A and in Item 7 — “Management’s Discussion and Analysis of Financial Condition and Results of Operations” of this report, these factors include, but are not limited to:

the current economic environment and its effects, such as lower economic growth, a tight labor market, inflation, supply chain delays, increased expenses, volatile capital markets, or other unpredictable effects;
our ability to manage capital expenditures and operations and maintenance costs while maintaining reliability and customer service levels;
variations in demand for electricity, including those due to weather, seasonality (including large increases in ambient temperatures), the general economy or social conditions, customer, and sales growth (or decline), the effects of energy conservation measures and distributed generation, and technological advancements;
the potential effects of climate change on our electric system, including as a result of weather extremes such as prolonged drought and high temperature variations in the area where APS conducts its business;
power plant and transmission system performance and outages;
competition in retail and wholesale power markets;
regulatory and judicial decisions, developments, and proceedings;
new legislation, ballot initiatives and regulation or interpretations of existing legislation or regulations, including those relating to environmental requirements, regulatory and energy policy, nuclear plant operations and potential deregulation of retail electric markets;
fuel and water supply availability;
our ability to achieve timely and adequate rate recovery of our costs through our rates and adjustor recovery mechanisms, including returns on and of debt and equity capital investment;
our ability to meet renewable energy and energy efficiency mandates and recover related costs;
the ability of APS to achieve its clean energy goals (including a goal by 2050 of 100% clean, carbon-free electricity) and, if these goals are achieved, the impact of such achievement on APS, its customers, and its business, financial condition, and results of operations;
risks inherent in the operation of nuclear facilities, including spent fuel disposal uncertainty;
current and future economic conditions in Arizona, including in real estate markets;Arizona;
the direct or indirect effect on our facilities or business from cybersecurity threats or intrusions, data security breaches, terrorist attack, physical attack, severe storms, droughts, or other catastrophic events, such as fires, explosions, pandemic health events or similar occurrences;
the development of new technologies which may affect electric sales or delivery;delivery, including as a result of delays in the development and application of new technologies;
the cost of debt, including increased cost as a result of rising interest rates, and equity capital and the ability to access capital markets when required;
environmental, economic, and other concerns surrounding coal-fired generation, including regulation of greenhouse gasGHG emissions;
volatile fuel and purchased power costs;
the investment performance of the assets of our nuclear decommissioning trust, pension, and other postretirement benefit plans and the resulting impact on future funding requirements;
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the liquidity of wholesale power markets and the use of derivative contracts in our business;
potential shortfalls in insurance coverage;
new accounting requirements or new interpretations of existing requirements;
generation, transmission and distribution facility and system conditions and operating costs;
the ability to meet the anticipated future need for additional generation and associated transmission facilities in our region;
the willingness or ability of our counterparties, power plant participants and power plant land ownerslandowners to meet contractual or other obligations or continue or discontinueextend the rights for continued power plant operations consistent with our corporate interests;operations; and
restrictions on dividends or other provisions in our credit agreements and ACC orders. 

These and other factors are discussed in the Risk Factors described in Item 1A of this report, and in Item 7 — “Management’s Discussion and Analysis of Financial Condition and Results of Operations” of this

report, which readers should review carefully before placing any reliance on our financial statements or disclosures.  Neither Pinnacle West nor APS assumes any obligation to update these statements, even if our internal estimates change, except as required by law.


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PART I


ITEM 1.  BUSINESS

Pinnacle West

Pinnacle West is a holding company that conducts business through its subsidiaries.  We derive essentially all of our revenues and earnings from our wholly-owned subsidiary, APS.  APS is a vertically-integrated electric utility that provides either retail or wholesale electric service to most of the State of Arizona, with the major exceptions of about one-half of the Phoenix metropolitan area, the Tucson metropolitan area and Mohave County in northwestern Arizona.
 
Pinnacle West’s other subsidiaries are El Dorado, BCE and 4CA.  Additional information related to these subsidiaries is provided later in this report.
 
Our reportable business segment is our regulated electricity segment, which consists of traditional regulated retail and wholesale electricity businesses (primarily electric service to Native Load customers) and related activities, and includes electricity generation, transmission, and distribution.
 
BUSINESS OF ARIZONA PUBLIC SERVICE COMPANY
 
APS currently provides electric service to approximately 1.3 million customers.  We own or lease 6,3166,340 MW of regulated generation capacity and we hold a mix of both long-term and short-term purchased power agreements for additional capacity, including a variety of agreements for the purchase of renewable energy.  During 2019,2022, no single purchaser or user of energy accounted for more than 1.7%2.4% of our electric revenues.


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The following map shows APS’s retail service territory, including the locations of its generating facilities and principal transmission lines.pnw-20221231_g1.jpg


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a2019serviceterritorya01.jpg
Table of Contents

Energy Sources and Resource Planning

To serve its customers, APS obtains power through its various generation stations and through purchased power agreements.  Resource planning is an important function necessary to meet Arizona’s future energy needs.  APS’s sources of energy by type used to supply energy to Native Load customers during 20192022 were as follows:
chart-7939f31b4c185c99a8e.jpgpnw-20221231_g2.jpg
* When including APS’s historicalRenewables include energy efficiencyfrom wind, solar, geothermal, biomass, DG, and distributed generation energy contributions, thesolar PPAs.

The share of our customers’APS’s energy supply being derived from clean resources is 51%.
** Purchased Power, which includes energy from nuclear, renewables from long-term power purchase agreements with grid-scale renewables providers and distributed generation.

DSM.

BCE also has acquired minority ownership positions in two wind farms that achieved commercial operation in 2020. Both wind farms deliver power under long-term PPAs. See “Business of Other Subsidiaries — Bright Canyon Energy” below for information regarding BCE’s investments.

Clean Energy Focus Initiatives


In response to climate change, the entire electric utility industry, as well as the global economy, is in the midst of a profound transition to clean energy and a new low-carbon economy. APS has undertaken a number of initiatives to address emission concerns,reduce carbon, including renewable energy procurement and development, and promotion of programs and rates that promote energy conservation, renewable energy use, and energy efficiency. (SeeSee “Energy Sources and Resource Planning - Current and Future Resources” below for details of these plans and initiatives.) APS currently has a diverse portfolio of renewable resources,
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including solar, wind, geothermal, biogas, and biomass. In addition, in January 2020, APS recently announced its Clean Energy Commitment, a three-pronged approach aimed at ultimately eliminating carbon-emitting resources from its electric generation resource portfolio.

APS’s Clean Energy Commitment consistsclean energy goals consist of three parts. First, APS announced an aspirationalparts:
a 2050 goal to generate electricity with zero-carbon emissions by 2050. Second, APS announced provide 100% clean, carbon-free electricity;
a nearer-term 2030 target of achieving a resource mix that is 65% clean energy, with 45% of APS'sthe generation portfolio coming from renewable energy. Third, APS committedenergy; and
a commitment to

eliminate end APS’s use of coal-fired generation from its portfolio of electricity generating resources by 2031.

Among other strategies, APS intends to achieve these goals through various methods such as relying on Palo Verde, the nation’s largest producer of carbon-free energy; increasing clean energy resources, including renewables; developing energy storage; cease buying coal-generation;ceasing the use of coal-generated electricity; managing demand with a modern interactive grid; promoting customer technology and energy efficiency; and optimizing regional resources. (SeeManagement takes into consideration climate change and other environmental risks in its strategy development, business planning, and enterprise risk management processes. See Item 7, "Management's“Management’s Discussion and Analysis of Financial Condition and Results of Operation"Operations” for additional information about ourAPS’s Clean Energy Commitment.)

Over this same period of time, APS also intends to harden its infrastructure in order to improve climate resiliency, which involves system and operational improvements aimed at reducing the impact of extreme weather events and other climate-related disruptions upon APS'sAPS’s operations. Among other resiliency strategies, APS anticipates increasing investments in a modern and more flexible electricity grid with advanced distribution technologies. Moreover, APS plans to continue its comprehensive forest management programs aimed at reducing wildfires, as those risks become compounded by shorter, drier winters and longer, hotter summers.summers as a result of climate change.

APS prepares an annual inventory of GHG emissions from its operations. For APS'sAPS’s operations involving fossil-fuel electricity generation and electricity transmission and distribution, APS'sAPS’s annual GHG inventory is reported to EPA under the EPA GHG Reporting Program. APS also voluntarily tracks the full scope of the Company'sAPS’s GHG emissions arising from all APS operations. In addition to reporting to the EPA, we publicly report Scope 1, 2 and 3 GHG emissions from generation and transmission and distribution operations, this data includes all other GHG emissions arising from ancillary Company operations, such as vehicle use, employee travel, portable generators and facility energy usage.emissions. This data is then communicated to the public in Pinnacle West’s annual Corporate Responsibility Report as performance data and in CDP Reports, which isare available on our website (www.pinnaclewest.comwww.pinnaclewest.com/corporate-responsibility). The report providesreports provide information related to the Company and its approach to sustainability and its workplace and environmental performance. The information on Pinnacle West’s website, including the Corporate Responsibility Report,Reports and CDP Reports, is not incorporated by reference into or otherwise a part of this report.

Generation Facilities
 
APS has ownership interests in or leases the coal, nuclear, gas, oil, coal, and solar generating facilities as well as energy storage facilities described below.  For additional information regarding these facilities, see Item 2.
 
Nuclear

Palo Verde Generating Station — Palo Verde is a 3-unit nuclear power plant located approximately 50 miles west of Phoenix, Arizona.  APS operates the plant and owns 29.1% of Palo Verde Units 1 and 3
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and approximately 17% of Unit 2.  In addition, APS leases approximately 12.1% of Unit 2, resulting in a 29.1% combined ownership and leasehold interest in that unit.  APS has a total entitlement from Palo Verde of 1,146 MW.
 
Palo Verde Leases — In 1986, APS entered into agreements with three separate lessor trust entities in order to sell and lease back approximately 42% of its share of Palo Verde Unit 2 and certain common facilities.  The leaseback was originally scheduled to expire at the end of 2015 and contained options to renew the leases or to purchase the leased property for fair market value at the end of the lease terms.  On July 7, 2014, APS exercised the fixed rate lease renewal options.  The exercise of the renewal options originally resulted in APS retaining the assets through 2023 under one lease and 2033 under the other two leases. On April 1, 2021, APS executed an amendment relating to the lease agreement with the term ending in 2023. The amendment extends the lease term for this lease through 2033 and changes the lease payment. As a result of this amendment, APS will now retain the assets through 2033 under all three lease agreements. At the end of the lease renewal periods, APS will have the option to purchase the leased assets at their fair market value, extend the leases for up to two years, or return the assets to the lessors. See Note 1917 for additional information regarding the Palo Verde Unit 2 sale leaseback transactions.

 
Palo Verde Operating Licenses — Operation of each of the three Palo Verde Units requires an operating license from the NRC.  The NRC issued full power operating licenses for Unit 1 in June 1985, Unit 2 in April 1986, and Unit 3 in November 1987, and issued renewed operating licenses for each of the three units in April 2011, which extended the licenses for Units 1, 2, and 3 to June 2045, April 2046, and November 2047, respectively.
 
Palo Verde Fuel Cycle — The participant owners of Palo Verde are continually identifying their future nuclear fuel resource needs and negotiating arrangements to fill those needs.  The fuel cycle for Palo Verde is comprised of the following stages:
mining and milling of uranium ore to produce uranium concentrates;
conversion of uranium concentrates to uranium hexafluoride;
enrichment of uranium hexafluoride;
fabrication of fuel assemblies;
utilization of fuel assemblies in reactors; and
storage and disposal of spent nuclear fuel.
    
The Palo Verde participants have contracted for 100% of Palo Verde’s requirements for uranium concentrates through 20252028 and 30%48% through 2028;2029; 100% of Palo Verde’s requirements for conversion services through 2025,2030 and 40% through 2030;2031; 100% of Palo Verde’s requirements for enrichment services through 2021, 90%2026 and 28% for 2022, and 80% for 2023 through 2026;2027; and 100% of Palo Verde’s requirements for fuel fabrication through 2027.2027 for Unit 2 and Unit 1 and 2028 for Unit 3.

Spent Nuclear Fuel and Waste Disposal — The Nuclear Waste Policy Act of 1982 (“NWPA”) required the DOE to begin to accept, transport, and dispose of spent nuclear fuel and high levelhigh-level waste generated by the nation’s nuclear power plants by 1998.  The DOE’s obligations are reflected in a contract for Disposal of Spent Nuclear Fuel and/or High-Level Radioactive Waste (the “Standard Contract”) with each nuclear power plant.  The DOE failed to begin accepting spent nuclear fuel by 1998.  The DOE had planned to meet its NWPA and Standard Contract disposal obligations by designing, licensing, constructing, and operating a permanent geologic repository at Yucca Mountain, Nevada.  In June 2008, the DOE submitted its Yucca Mountain construction authorization application to the NRC, but in March 2010, the DOE filed a motion to dismiss with prejudice the Yucca Mountain construction
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authorization application.  Several legal proceedings followed challenging DOE’s withdrawal of its Yucca Mountain construction authorization application and the NRC’s cessation of its review of the Yucca Mountain construction authorization application, which were consolidated into one matter at the U.S. Court of Appeals for the District of Columbia Circuit (the “D.C. Circuit”). Following the D.C. Circuit’s August 2013 order, the NRC issued two volumes of the safety evaluation report developed as part of the Yucca Mountain construction authorization application. Publication of these volumes do not signal whether or when the NRC might authorize construction of the repository. APS is directly involved in legal proceedings related to the DOE’s failure to meet its statutory and contractual obligations regarding acceptance of spent nuclear fuel and high levelhigh-level waste.
 
APS Lawsuit for Breach of Standard Contract — In December 2003, APS, acting on behalf of itself and the Palo Verde participants, filed a lawsuit against the DOE in the United States Court of Federal Claims ("(“Court of Federal Claims"Claims”) for damages incurred due to the DOE’s breach of the Standard Contract.  The Court of Federal Claims ruled in favor of APS and the Palo Verde participants in October 2010 and awarded damages to APS and the Palo Verde participants for costs incurred through December 2006.
 
On December 19, 2012, APS, acting on behalf of itself and the participant owners of Palo Verde, filed a second breach of contract lawsuit against the DOE in the Court of Federal Claims. This lawsuit sought to recover damages incurred due to the DOE’s breach of the Standard Contract for failing to accept Palo Verde’s

spent nuclear fuel and high levelhigh-level waste from January 1, 2007 through June 30, 2011, as it was required to do pursuant to the terms of the Standard Contract and the NWPA. On August 18, 2014, APS and the DOE entered into a settlement agreement, stipulating to a dismissal of the lawsuit and payment by the DOE to the Palo Verde owners for certain specified costs incurred by Palo Verde during the period January 1, 2007, through June 30, 2011. In addition, the settlement agreement providesprovided APS with a method for submitting claims and getting recovery for costs incurred through December 31, 2016, which was extended to December 31, 2019.2022. An additional extension is currently pending.


APS has submitted and received payment for fiveeight claims pursuant to the terms of the August 18, 2014 settlement agreement for fiveeight separate time periods during July 1, 2011 through June 30, 2018.2021. The DOE has approved and paid $84.3$123.9 million for these claims (APS’s share is $24.5$36 million). The amounts recovered were primarily recorded as adjustments to a regulatory liability and had no impact on reported net income. APS's nextIn accordance with the 2017 Rate Case Decision, this regulatory liability is being refunded to customers. See Note 3. On October 31, 2022, APS filed its ninth claim pursuant to the terms of the August 18, 2014, settlement agreement was submitted to the DOE on October 31, 2019 in the amount of $16 million (APS's share is $4.7 million). On February 11, 2020, the DOE approved a payment of $15.4$14.3 million (APS’s share is $4.5$4.2 million). In February 2023, the DOE approved this claim.


Waste Confidence and Continued Storage — On June 8, 2012, the D.C. Circuit issued its decision on a challenge by several states and environmental groups of the NRC’s rulemaking regarding temporary storage and permanent disposal of high levelhigh-level nuclear waste and spent nuclear fuel.  The petitioners had challenged the NRC’s 2010 update to the agency’s waste confidence decision and temporary storage rule (“Waste Confidence Decision”). The D.C. Circuit found that the NRC’s evaluation of the environmental risks from spent nuclear fuel was deficient, and therefore remanded the Waste Confidence Decision update for further action consistent with NEPA.National Environmental Policy Act. In September 2013, the NRC issued its draft Generic Environmental Impact Statement (“GEIS”) to support an updated Waste Confidence Decision. On August 26, 2014, the NRC approved a final rule on the environmental effects of continued storage of spent nuclear fuel. Renamed as the Continued Storage Rule, the NRC’s decision adopted the findings of the GEIS regarding the environmental impacts of storing spent fuel at any reactor site after the reactor’s licensed period of operations. As a result, those generic impacts do not need to be
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re-analyzed in the environmental reviews for individual licenses. The final Continued Storage Rule was subject to continuing legal challenges before the NRC and the Court of Appeals. In June 2016, the D.C. Circuit issued its final decision, rejecting all remaining legal challenges to the Continued Storage Rule. On August 8, 2016, the D.C. Circuit denied a petition for rehearing.
    
Palo Verde has sufficient capacity at its on-site independent spent fuel storage installation (“ISFSI”) to store all of the nuclear fuel that will be irradiated during the initial operating license period, which ends in December 2027. Additionally, Palo Verde has sufficient capacity at its on-site ISFSI to store a portion of the fuel that will be irradiated during the period of extended operation, which ends in November 2047. If uncertainties regarding the United States government’s obligation to accept and store spent fuel are not favorably resolved, APS will evaluate alternative storage solutions that may obviate the need to expand the ISFSI to accommodate all of the fuel that will be irradiated during the period of extended operation.
 
Nuclear Decommissioning Costs — APS currently relies on an external sinking fund mechanism to meet the NRC financial assurance requirements for decommissioning its interests in Palo Verde Units 1, 2 and 3.  The decommissioning costs of Palo Verde Units 1, 2 and 3 are currently included in APS’s ACC jurisdictional rates.  Decommissioning costs are recoverable through a non-bypassable system benefits charge (paid by all retail customers taking service from the APS system).  Based on current nuclear decommissioning trust asset balances, site specific decommissioning cost studies, anticipated future contributions to the decommissioning trusts, and return projections on the asset portfolios over the expected remaining operating life of the facility, we are on track to meet the current site specificsite-specific decommissioning costs for Palo Verde at the time the units are expected to be decommissioned. See Note 2018 for additional information about APS’s nuclear decommissioning trusts.

 
Palo Verde Liability and Insurance Matters — See “Palo Verde Generating Station — Nuclear Insurance” in Note 1110 for a discussion of the insurance maintained by the Palo Verde participants, including APS, for Palo Verde.
 
Natural Gas and Oil Fueled Generating Facilities

APS has six natural gas power plants located throughout Arizona, consisting of Redhawk, located near Palo Verde; Ocotillo, located in Tempe (discussed below); Sundance, located in Coolidge; West Phoenix, located in southwest Phoenix; Saguaro, located north of Tucson; and Yucca, located near Yuma. Several of the units at Yucca run on either gas or oil. APS has two oil-only power plants: Fairview, located in the town of Douglas, Arizona and Yucca GT-4 in Yuma, Arizona. APS owns and operates each of these plants with the exception of one oil-only combustion turbine unit and one oil and gas steam unit at Yucca that are operated by APS and owned by the Imperial Irrigation District. APS has a total entitlement from these plants of 3,573 MW. GasA portion of the gas for these plants is financially hedged up to fivethree years in advance of purchasing and thethat position is converted to a physical gas is generally purchasedpurchase one month prior to delivery. APS has long-term gas transportation agreements with three different companies, some of which are effective through 2027.2049. Fuel oil is acquired under short-term purchases delivered by truck directly to the power plants.

Ocotillo was originally a 330 MW 4-unit gas plant located in the metropolitan Phoenix area.Tempe. In early 2014, APS announced a project to modernize the plant, which involved retiring two older 110 MW steam units, adding five 102 MW combustion turbines, and maintaining two existing 55 MW combustion turbines. In total, this increased the capacity of the site by 290 MW to 620 MW. (See Note 4 for rate recovery as part of the ACC final written Opinion and Order issued reflecting its decision in APS’s general retail rate case (the "2017 Rate Case Decision")). The Ocotillo modernization project was completed in 2019.

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Coal-Fueled
Coal Fueled Generating Facilities

Four Corners — Four Corners is located in the northwestern corner of New Mexico and was originally a 5-unit coal-fired power plant. APS owns 100% of Units 1, 2 and 3, which were retired as of December 30, 2013. APS operates the plant and owns 63% of Four Corners Units 4 and 5. APS has a total entitlement from Four Corners of 970 MW. Additionally, 4CA, a wholly-owned subsidiary of Pinnacle West, owned 7% of Units 4 and 5 from July 2016 through July 2018 following its acquisition of El Paso'sPaso’s interest in these units described below. As part of APS's recently announcedAPS’s Clean Energy Commitment, APS has committed to eliminatecease using coal-fired generation fromas part of its portfolio of electricity generating resources, including Four Corners, by 2031.

NTEC, a company formed by the Navajo Nation to own the mine that serves Four Corners and develop other energy projects, is the coal supplier for Four Corners. The Four Corners’ co-owners executed a long-term agreement for the supply of coal to Four Corners from July 2016 through 2031 (the "2016“2016 Coal Supply Agreement"Agreement”). El Paso, a 7% owner of Units 4 and 5 of Four Corners, did not sign the 2016 Coal Supply Agreement. Under the 2016 Coal Supply Agreement, APS agreed to assume the 7% shortfall obligation. On February 17, 2015, APS and El Paso entered into an asset purchase agreement providing for the purchase by APS, or an affiliate of APS, of El Paso’s 7% interest in each of Units 4 and 5 of Four Corners. 4CA purchased the El Paso interest on July 6, 2016. The purchase price was immaterial in amount, and 4CA assumed El Paso'sPaso’s reclamation and decommissioning obligations associated with the 7% interest.

On June 29, 2018, 4CA and NTEC entered into an asset purchase agreement providing for the sale to NTEC of 4CA's4CA’s 7% interest in Four Corners. NTEC assumed 4CA’s reclamation and decommissioning obligations associated with the 7% interest. The sale transaction closed on July 3, 2018. NTEC purchased the 7% interest at 4CA’s book value, approximately $70 million and is paying 4CApaid the purchase price over a

period of four years pursuant to a secured interest-bearing promissory note.note, which was paid in full as of June 30, 2022. In connection with the sale, Pinnacle West guaranteed certain obligations that NTEC will have to the other owners of Four Corners, such as NTEC'sNTEC’s 7% share of capital expenditures and operating and maintenance expenses. Pinnacle West'sWest’s guarantee is secured by a portion of APS'sAPS’s payments to be owed to NTEC under the 2016 Coal Supply Agreement.

The 2016 Coal Supply Agreement contained alternate pricing terms for the 7% interest in the event NTEC did not purchase the interest. Until the time that NTEC purchased the 7% interest, the alternate pricing provisions were applicable to 4CA as the holder of the 7% interest. These terms included a formula under which NTEC must make certain payments to 4CA for reimbursement of operations and maintenance costs and a specified rate of return, offset by revenue generated by 4CA’s power sales. The amount under this formula for calendar year 2018 (up to the date that NTEC purchased the 7% interest) was approximately $10 million, which was due to 4CA on December 31, 2019. Such payment was satisfied in January 2020 by NTEC directing to 4CA a prepayment from APS of future coal payment obligations.
APS, on behalf of the Four Corners participants, negotiated amendments to an existing facility lease with the Navajo Nation, which extends the Four Corners leasehold interest from 2016 to 2041. The Navajo Nation approved these amendments in March 2011. The effectiveness of the amendments also required the approval of the DOI, as did a related federal rights-of-way grant. A federal environmental review was undertaken as part of the DOI review process and culminated in the issuance by DOI of a record of decision on July 17, 2015, justifying the agency action extendingto extend the life of the plant and the adjacent mine.

On April 20, 2016, several environmental groups filed a lawsuit against OSMIn June 2021, APS and other federal agencies in the District of Arizona in connection with their issuance of the approvals that extended the lifeowners of Four Corners and the adjacent mine.  The lawsuit allegesentered into an agreement that these federal agencies violated both the Endangered Species Act ("ESA") and the National Environmental Policy Act ("NEPA") in providing the federal approvals necessary to extend operations atwould allow Four Corners andto operate seasonally at the adjacent Navajo Mine past July 6, 2016.  APS filed a motion to intervene in the proceedings, which was granted on August 3, 2016.

On September 15, 2016, NTEC, the company that owns the adjacent mine, filed a motion to intervene for the purpose of dismissing the lawsuit based on NTEC's tribal sovereign immunity. On September 11, 2017, the Arizona District Court issued an order granting NTEC's motion, dismissing the litigation with prejudice, and terminating the proceedings. On November 9, 2017, the environmental group plaintiffs appealed the district court order dismissing their lawsuit. On July 29, 2019, the Ninth Circuit Court of Appeals affirmed the September 2017 dismissalelection of the lawsuit, after whichowners beginning in fall 2023, subject to the environmental group plaintiffs petitionednecessary governmental approvals and conditions associated with changes in plant ownership. Under seasonal operation, one generating unit would be shut down during seasons when electricity demand is reduced, such as the Ninth Circuit for rehearing on September 12, 2019.winter and spring. The Ninth Circuit denied this petition for rehearing on December 11, 2019.other unit would remain online year-round, subject to market conditions as well as planned maintenance outages and unplanned outages. APS anticipates that it will elect not to begin seasonal operation in November 2023, unless market conditions change.
 
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Cholla — Cholla was originally a 4-unit coal-fired power plant, which is located in northeastern Arizona. APS operates the plant and owns 100% of Cholla Units 1, 2 and 3. PacifiCorp owns Cholla Unit 4, and APS operatesoperated that unit for PacifiCorp. On September 11, 2014, APS announced that it would close its 260 MWCholla Unit 2 at Cholla and cease burning coal at Unitsthe other APS-owned units (Units 1 and 33) at the plant by the mid-2020s, if EPA approved a compromise proposal offered by APS to meet required environmental and emissions standards and rules. On April 14, 2015, the ACC approved APS'sAPS’s plan to retire Unit 2, without expressing any view on the future recoverability of APS'sAPS’s remaining investment in the Unit, which was later addressed in the March 27, 2017 settlement agreement regarding APS's general retail case (the "2017 Settlement Agreement"). (See Note 4 for details related to the resulting regulatory asset and allowed recovery set forth in the 2017 Settlement Agreement.) APS believes that the environmental benefits of this proposal are greater in the long-term than the benefits that would have resulted from adding the emissions control equipment.Unit. APS closed Unit 2 on October 1, 2015. Following the closure of Unit 2, APS has a total entitlement from Cholla of 387381 MW. In early 2017, EPA

approved a final rule incorporating APS'sAPS’s compromise proposal, which took effect for Cholla on April 26, 2017. In December 2019, PacifiCorp notified APS that it plansplanned to retire Cholla Unit 4 by the end of 2020 and the unit ceased operation in December 2020. APS has committed to end the use of coal at its remaining Cholla units by 2025.

APS purchases all of Cholla’s coal requirements from a coal supplier that mines all of the coal under long-term leases of coal reserves with the federal and state governments and private landholders. The Cholla coal contract runs through 2024. In addition, APS has a coal transportation contract that runs through 2020, with the ability to extend the contract annually through 2024.

Navajo Plant — The Navajo Plant iswas a 3-unit coal-fired power plant located in northern Arizona. Salt River Project operatesoperated the plant and APS ownsowned a 14% interest in Units 1, 2 and 3. APS had a total entitlement from the Navajo Plant of 315 MW. The Navajo Plant’s coal requirements were purchased from a supplier with long-term leases from the Navajo Nation and the Hopi Tribe.  The Navajo Plant was under contract with its coal supplier through 2019, with extension rights through 2026.  The Navajo Plant site is leased from the Navajo Nation and is also subject to an easement from the federal government.

The co-owners of the Navajo Plant and the Navajo Nation agreed that the Navajo Plant would remain in operation until December 2019 under the existing plant lease. The co-owners and the Navajo Nation executed a lease extension on November 29, 2017, that allowswhich allowed for decommissioning activities to begin after the plant ceased operations in November 2019.

APS is currently recovering depreciation and a return on the net book value of its interest in the Navajo Plant over its previously estimated life through 2026. APS will seek continued recovery in rates for the book value of its remaining investment in the plant (seeplant. See Note 43 for details related to the resulting regulatory asset)asset plus a return on the net book value as well as other costs related to retirement and closure, which are still being assessed and which may be material.

See Note 1110 for information regarding APS’s coal mine reclamation obligations related to these coal-fired plants.

Solar Facilities

APS developed utility scale solar resources through the 170180 MW ACC-approved AZ Sun Program, investing approximately $675 million in this program. These facilities are owned by APS and are located in multiple locations throughout Arizona. In addition to the AZ Sun Program, APS developed the 4044 MW Red Rock Solar Plant, which it owns and operates. Two of our large customers purchase renewable energy credits from APS that are equivalent to the amount of renewable energy that Red Rock is projected to generate.

APS owns and operates more than thirty small solar systems around the state. Together they have the capacity to produce approximately 4 MW of renewable energy. This fleet of solar systems includes a 3 MW facility located at the Prescott Airport and 1 MW of small solar systems in various locations across
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Arizona. APS has also developed solar photovoltaic distributed renewable energy systems installed as part of the Community Power Project in Flagstaff, Arizona. The Community Power Project, approved by the ACC on April 1, 2010, was a pilot program through which APS owns, operates, and receives energy from approximately 1 MW of solar photovoltaic distributed renewable energy systems located within a certain test area in Flagstaff, Arizona. The pilot program is now complete and as part of the 2017 Rate Case Decision, the participants have been transferred to the Solar Partner Program described below. Additionally, APS owns 13 MW of solar photovoltaic systems installed across Arizona through the ACC-approved Schools and Government Program.

In December 2014, the ACC voted that it had no objection to APS implementing an APS-owned rooftop solar research and development program aimed at learning how to efficiently enable the integration of rooftop solar and battery storage with the grid. The first stage of the program, called the "Solar“Solar Partner

Program," placed 8 MW of residential rooftop solar on strategically selected distribution feeders in an effort to maximize potential system benefits, as well as made systems available to limited-income customers who could not easily install solar through transactions with third parties. The second stage of the program, which included an additional 2 MW of rooftop solar and energy storage, placed two energy storage systems sized at 2 MW on two different high solar penetration feeders to test various grid-related operation improvements and system interoperability, and was in operation by the end of 2016. The costs for this program have been included in APS'sAPS’s rate base as part of the 2017 Rate Case Decision.

In the 2017 Rate Case Decision, the ACC also approved the "APS“APS Solar Communities"Communities” program. APS Solar Communities (formerly AZ Sun II) is a three-year program authorizing APS to spend $10 million -to $15 million in capital costs each year to install utility-owned distributed generationDG systems on low to moderate income residential homes, non-profit entities, Title I schools, and rural government facilities. The 2017 Rate Case Decision provided that all operations and maintenance expenses, property taxes, marketing and advertising expenses, and the capital carrying costs for this program will be recovered through the RES. Currently, APS has installed 511 MW of distributed generationDG systems under the APS Solar Communities program. In the 2019 Rate Case decision, the ACC authorized APS to spend $20 million to $30 million in capital costs for the APS Solar Communities program each year for a period of three years from the effective date of the decision.

Energy Storage


APS deploys a number of advanced technologies on its system, including energy storage. Storage can provideEnergy storage provides capacity, improveimproves power quality, can be utilized for system regulation integrate renewable generation, and, canin certain circumstances, be used to defer certain traditional infrastructure investments. Energy storage can also aidaids in integrating higher levels of renewablesrenewable generation by storing excess energy when system demand is low and renewable production is high and then releasing the stored energy during peak demand hours later in the day and after sunset. APS is utilizing grid-scale energy storage projects to benefit customers, tomeet customer reliability requirements, increase renewable utilization, and to further our understanding of how storage works with other advanced technologies and the grid. We are preparing for additional energy storage in the future.


In early 2018, APS entered into a 15-year power purchase agreement for a 65 MW solar facility that charges a 50 MW solar-fueled battery. Service under this agreement is scheduled to begin in 2021. In 2018, APS issued a request for proposal (“RFP”) for approximately 106 MW of energy storage to be located at up to five of its AZ Sun sites. Based upon ourits evaluation of the Request for Proposals ("RFP")RFP responses, APS decided to expand the initial phase of battery deployment to 141 MW by adding a sixth AZ Sun site. In February 2019, we contracted for the 141 MW and originally anticipated suchThese battery storage facilities couldare currently expected to be in service by mid-2020. In April 2019,during the first quarter of 2023.On August 2, 2021, APS executed a battery module in APS’s McMicken batterycontract for an additional 60 MW of utility-owned energy storage facility experienced an equipment failure, which prompted an internal investigation to determine the cause. The results of the investigation will inform the timing of our utilization and implementation of batteriesbe located on our system. Due to the April 2019 event, APS is working with the counterparty for theAPS’s AZ Sun sites to determine appropriate timing and path forward for suchsites.This contract, with a 2023 in-service date, will complete the addition of storage on current APS-owned utility-scale solar facilities.
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Additionally, in February 2019, APS signed two 20-year power purchase agreementsPPAs for energy storage totaling 150 MW. Service under these power purchase agreements is also dependent on the results of the McMicken battery incident investigation and requiresThese PPAs were subject to ACC approval from the ACCin order to allow for cost recovery through the PSA.APS received the requested ACC approval on January 12, 2021, and service under the agreements is expected to begin in 2023.

In December 2020, APS issued two RFPs (collectively, the “December 2020 RFPs”). As a result of thesethe December 2020 RFPs, APS executed four 20-year PPAs for resources that include energy storage: (a) two PPAs for standalone energy storage resources totaling 300 MW; and (b) two PPAs for solar plus storage resources totaling 275 MW. The PPAs are also subject to ACC approval to enable cost recovery through the PSA. APS received the requested ACC approval for three out of four of the projects on December 16, 2021 and on April 13, 2022 for the remaining project. Service under the agreements is expected to begin in 2023 and 2024.

In May 2022, APS issued an RFP to address resource needs for 2025 and beyond (the “2022 RFP”). As a result of the 2022 RFP, as of January 2023, APS has executed a 20-year PPA for solar plus storage resources totaling 300 MW. The PPA is subject to ACC approval to enable cost recovery through the PSA, (See Note 4 for details relatedwhich was requested in December 2022 and approved in February 2023. Service under this agreement is expected to the PSA).begin in 2025.

WeAPS currently planplans to install at least 850more than 1,200 MW of energy storage by 2025, including the 150 MW of energy storage projects under power purchase agreementsPPAs and AZ Sun retrofits described above. The additional 700 MW of APS-ownedremaining energy storage is expected to be made up of the retrofits associated with our AZ Sun sites as described above, along withresources solicited through current and future RFPs forRFPs.

The following table summarizes the resources in APS’s energy storage portfolio that are in operation and under development as of December 31, 2022.Agreements for the development and completion of future resources are subject to various conditions.

Net Capacity in Operation
(MW)
Net Capacity Planned / Under
Development (MW)
APS Owned Energy Storage201
PPAs Energy Storage1,025 
Residential Energy Storage19(a)7
Total Energy Storage Portfolio191,233 
(a)     This includes 18.5 MW of APS customer-owned batteries and 0.2 MW of APS-owned residential batteries.

Renewable Energy Portfolio

To date, APS has a diverse portfolio of existing and planned renewable resources totaling 3,894 MW, including solar, wind, geothermal, biomass and biogas. Of this portfolio, 2,418 MW are currently in operation and 1,476 MW are under contract for development or are under construction. Renewable resources in operation include 264 MW of facilities owned by APS, 736 MW of long-term purchased power agreements, and an estimated 1,418 MW of customer-sited, third-party owned distributed energy resources.
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As previously discussed, in May 2022, APS issued an RFP to address resource needs for 2025 and beyond. The 2022 RFP solicits competitive proposals for approximately 1,000 MW to 1,500 MW of resources, including up to 600 MW to 800 MW of renewable resources to meet the needs of 2025 and 2026 while also considering resources that can be online as late as 2027. The 2022 RFP stopped accepting bids on July 15, 2022, and APS sent notifications to shortlisted bidders on September 23, 2022. As a result of the 2022 RFP, and as of December 31, 2022, APS has signed a PPA for 300 MW of solar plus energy storage projects. Givenresources and a PPA for 216 MW of wind resources. Once APS secures those important resources and closes out the April 2019 event, we continue2022 RFP, APS intends to evaluate the appropriate timingissue APS’s next RFP to address future resource needs.
APS’s strategy to achieve its RES requirements includes executing purchased power contracts for new facilities, ongoing development of distributed energy resources and path forwardprocurement of new facilities to support the overall capacity goalsbe owned by APS.  See “Energy Sources and Resource Planning — Generation Facilities — Solar Facilities” above for our systeminformation regarding APS-owned solar facilities and associated“Energy Sources and Resource Planning — Generation Facilities — Energy Storage” above for more information regarding APS-owned energy storage requirements. Currently,facilities.

The following table summarizes APS’s renewable energy sources currently in operation and under development as of December 31, 2022.  Agreements for the development and completion of future resources are subject to various conditions, including successful siting, permitting and interconnection of the projects to the electric grid.
 Location
Actual/
 Target
Commercial
Operation
Date
Term
(Years)
Net
 Capacity
 In Operation
(MW AC)
Net Capacity
 Planned/Under
Development
(MW AC)
APS Owned     
Solar:     
AZ Sun Program:     
PalomaGila Bend, AZ2011 17  
Cotton CenterGila Bend, AZ2011 17  
Hyder Phase 1Hyder, AZ2011 11  
Hyder Phase 2Hyder, AZ2012 6  
Chino ValleyChino Valley, AZ2012 20  
Hyder IIHyder, AZ2013 14  
FoothillsYuma, AZ2013 38  
Gila BendGila Bend, AZ2014 36 
Luke AFBGlendale, AZ201511 
Desert StarBuckeye, AZ201510 
Subtotal AZ Sun Program   180  
Multiple FacilitiesAZVarious 4  
Red RockRed Rock, AZ201644 
Agave SolarArlington, AZ2023150
Distributed Energy:     
APS Owned (a)AZVarious 36 
Total APS Owned   264 150 
Purchased Power Agreements     
Solar:     
SolanaGila Bend, AZ201330 250  
RE AjoAjo, AZ201125 5  
Sun E AZ 1Prescott, AZ201130 10  
Saddle MountainTonopah, AZ201230 15  
BadgerTonopah, AZ201330 15  
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GillespieMaricopa County, AZ201330 15  
CO Bar Solar ACoconino County, AZ202318 80 
CO Bar Solar BCoconino County, AZ202318 80 
Mesquite Solar 5Tonopah, AZ202320 60 
Sunstreams 3Arlington, AZ202420 215 
Sunstreams 4Arlington, AZ202520 300 
Wind:     
Aragonne MesaSanta Rosa, NM202220 200 
High LonesomeMountainair, NM200930 100  
Perrin Ranch WindWilliams, AZ201225 99  
Chevelon ButteWinslow, AZ202320 238 
Chevelon Butte IIWinslow, AZ202420 216 
Geothermal:     
Salton SeaImperial County, CA200623 10  
Biomass:     
SnowflakeSnowflake, AZ200825 14  
Biogas:     
NW Regional LandfillSurprise, AZ201220 3  
Total Purchased Power Agreements   736 1,189 
Distributed Energy     
Solar (b)
     
Third-party OwnedAZVarious 1,385 137 
Agreement 1Bagdad, AZ201125 15  
Agreement 2AZ2011-201220-2118  
Total Distributed Energy   1,418 137 
Total Renewable Portfolio   2,418 1,476 
(a)Includes Flagstaff Community Power Project, APS School and Government Program, APS Solar Partner Program, and APS Solar Communities Program.
(b)Includes rooftop solar facilities owned by third parties. DG is pursuing an RFPproduced in DC and is converted to AC for battery-ready solar resources up to 150 MW with results expected in the first half of 2020.reporting purposes.


Purchased Power Contracts

In addition to its own available generating capacity, APS purchases electricity under various arrangements, including long-term contracts and purchases through short-term markets to supplement its owned or leased generation and hedge its energy requirements.  A portion of APS’s purchased power expense is netted against wholesale sales on the Consolidated Statements of Income.  (SeeSee Note 17.)15. APS continually assesses its need for additional capacity resources to assure system reliability. In addition, APS has also entered into several power purchase agreementsPPAs for energy storage. (See "BusinessSee “Business of Arizona Public Service Company - Energy Sources and Resource Planning - Energy Storage"Storage” above for details ofon our energy storage power purchase agreements.)PPAs.

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Purchased Power Capacity — APS’s purchased power capacity under long-term contracts as of December 31, 20192022, is summarized in the table below.  All capacity values are based on net capacity unless otherwise noted.
TypeDates AvailableCapacity 
(MW)
Purchase Agreement (a)Year-round through June 14, 202020236045 
Exchange Agreement (b)May 15 to September 15 annually through February 2021480
Demand Response Agreement (c)Summer seasons through 202420252575 
Tolling AgreementMay 1 through October 31, 2021-2027463 
Tolling AgreementSummer seasons from Summer 2020 through Summer 2025565
Tolling AgreementJune 1 through September 30, 2020-2026570
Renewable Energy (d)Various626
Tolling AgreementMay 1 through October 31, 2021-2027463
(a)Renewable Energy (b)Up to 60 MW of capacity is available; however, the amount of electricity available to APS under this agreement is based in large part on customer demand and is adjusted annually.
Various736 
(b)This is a seasonal capacity exchange agreement under which APS receives electricity during the summer peak season (from May 15 to September 15) and APS returns a like amount of electricity during the winter season (from October 15 to February 15).
(c)The capacity under this agreement may be increased in 10 MW increments in years 2017 through 2024, up to a maximum of 50 MW.
(d)Renewable energy purchased power agreements are described in detail below under “Current and Future Resources — Renewable Energy Standard — Renewable Energy Portfolio.”
(a)Up to 45 MW of capacity is available; however, the amount of electricity available to APS under this agreement is based in large part on customer demand and is adjusted annually.
(b)Does not include MW of capacity planned or under development. Renewable energy purchased power agreements are described in detail below under “Current and Future Resources — Renewable Energy Standard — Renewable Energy Portfolio.”
Current and Future Resources
 
Current Demand and Reserve Margin

Electric power demand is generally seasonal.  In Arizona, demand for power peaks during the hot summer months.  APS’s 20192022 peak one-hour demand on its electric system was recorded on August 5, 2019July 11, 2022, at 7,1157,587 MW, compared to the 20182021 peak of 7,3207,580 MW recorded on July 24, 2018.  The reduction was largely driven by milder peak day weather conditions in 2019.June 18, 2021.  APS’s reserve margin at the time of the 20192022 peak demand, calculated using system load serving capacity, was 16%13%.  For 2020,2023, due to expiring purchased power contracts, APS is procuring market resources to maintain its minimum 15% planning reserve criteria.


Future Resources and Resource Plan

ACC rules require utilities to develop fifteen-year15-year Integrated Resource Plans ("IRP"(“IRP”) which describe how the utility plans to serve customer load in the plan timeframe.  The ACC reviews each utility’s IRP to determine if it meets the necessary requirements and whether it should be acknowledged. In March of 2018, the ACC reviewed the 2017 IRPs of its jurisdictional utilities and voted to not acknowledge any of the plans.  APS does not believe that this lack of acknowledgment will have a material impact on our financial position, results of operations or cash flows.  Based on an ACC decision, APS was originally required to file its next IRP by April 1, 2020.  On February 20, 2020, the ACC extended the deadline for all utilities to file their IRP’sIRPs from April 1, 2020, to June 26, 2020. On June 26, 2020, APS filed its final IRP. On July 15, 2020, the ACC extended the schedule for final ACC review of utility IRPs to February 2021. In February 2022, the ACC acknowledged APS’s IRP. The ACC also approved certain amendments to the IRP process, including, setting an EES of 1.3% of retail sales annually (averaged over a three-year period) and a demand-side resource capacity of 35% of 2020 peak demand by January 1, 2030. Due to current projected future resource needs and load forecasts, APS continues to need to develop or acquire additional capacity. APS intends to file its next IRP later in 2023.

See "Business“Business of Arizona Public Service Company - Energy Sources and Resource Planning - Clean Energy Focus Initiatives"Initiatives” and "Business“Business of Arizona Public Service Company - Energy Sources and Resource Planning - Energy Storage"Storage” above for information regarding future plans for energy storage. See "Business“Business of Arizona Public Service Company - Energy Sources and Resource Planning - Generation Facilities - Coal-Fueled Generating Facilities"Facilities” above for information regarding plans for Cholla, Four Corners and the Navajo Plant.
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Energy Imbalance Market & Wholesale Market

In 2015,2016, APS and the CAISO, the operator for the majority of California's transmission grid, signed an agreement for APSbegan to begin participationparticipate in the Energy Imbalance Market (“EIM”). APS's participation in, a voluntary, real-time optimization market operated by the EIM began on October 1, 2016.CAISO. The EIM allows for rebalancing supply and demand in 15-minute blocks withand dispatching generation every five minutes, before the energy is needed, instead of the traditional one hourone-hour blocks. APS continues to expect that its participation in EIM will lower its fuel and purchased-power costs, improve visibility and situational awareness for system operations in the Western Interconnection power grid, and improve integration of APS’s renewable resources. APS is in discussions with the EIM operator, CAISO, and other EIM participants about the feasibility of creating a voluntary day-ahead market to achieve more cost savings and use the region’s renewable resources more efficiently. APS also is in discussions with Southwest Power Pool, a market operator developing a day-ahead and real-time market for the Western Interconnection. In addition, APS is participating in the Western Resource Adequacy Program administered by the Western Power Pool. These efforts are driven by three objectives of reducing customer cost, improving reliability, and incorporating more clean energy on APS’s system.

Energy Modernization Plan

On July 30, 2020, the ACC Staff issued final draft energy rules, which proposed 100% of retail kWh sales from clean energy resources by the end of 2050. Nuclear power was defined as a clean energy resource. The proposed rules also required 50% of retail energy served be renewable by the end of 2035. On November 13, 2020, the ACC approved a final draft energy rules package which required additional procedural steps in the rulemaking process. In June 2021, the ACC adopted clean energy rules based on a series of ACC amendments to the final energy rules. The adopted rules require 100% clean energy by 2070 and the following interim standards for carbon reduction from baseline carbon emissions level: 50% reduction by December 31, 2032; 65% reduction by December 31, 2040; 80% reduction by December 31, 2050, and 95% reduction by December 31, 2060. Since the adopted clean energy rules differed substantially from the original Recommended Order and Opinion, supplemental rulemaking procedures were required before the rules could become effective. On January 26, 2022, the ACC reversed its prior decision and declined to send the final draft energy rules through the rulemaking process. Instead, the ACC opened a new docket to consider All-Source RFP requirements and the IRP process. During the August 2022 ACC Open Meeting, Commissioners voted to postpone a decision on the All-Source RFP and IRP rulemaking package until 2023. APS cannot predict the outcome of this matter. See Note 3 for additional information related to these energy rules.

Renewable Energy Standard

In 2006, the ACC adopted the RES.  Under the RES, electric utilities that are regulated by the ACC must supply an increasing percentage of their retail electric energy sales from eligible renewable resources, including solar, wind, biomass, biogas, and geothermal technologies.  The renewable energy requirement is 10%13% of retail electric sales in 20202023 and increases annually until it reaches 15% in 2025. In APS’s 2009 general retail rate case settlement agreement (the “2009 Settlement Agreement”), APS committed to use its best efforts to have 1,700 GWh of new renewable resources in service by year-end 2015 in addition to any existing resources or commitments as of the end of 2008. APS met its settlement commitment in 2015.
    
A component of the RES is focused on stimulating development of distributed renewable energy systems.  Accordingly, under the RES, an increasing percentage of that requirement must be supplied from distributed energy resources.  This distributed renewable energy requirement, iswhich was waived by the ACC as a part of APS’s 2023 RES Implementation Plan, would have been 30% of the overall RES requirement of 10%13% in 2020.2023. On June 7, 2021, the ACC approved the 2021 RES Implementation Plan. On July 1, 2019,2021, APS filed its 20202022 RES Implementation Plan.Plan, which was subsequently amended on December 9, 2021. On May 18, 2022, the ACC approved the 2022 RES Implementation Plan, including an
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amendment requiring a stakeholder working group to convene and develop a community solar program for the Commission’s consideration at a future date. On September 23, 2022, APS filed a community solar proposal in compliance with the ACC order that was informed by a stakeholder working group. APS is proposing a small, pilot scale program size of up to 140 MW that would be selected through a competitive RFP. The ACC has not yet ruled on the proposal. However, on November 10, 2022, the ACC approved a bifurcated community solar process, directing ACC Staff to develop a statewide policy through additional stakeholder involvement and establishing a separate evidentiary hearing to define other policy components. The community solar program was deferred to the ACC’s Hearing Division so that a formal evidentiary hearing could be held to consider issues of substance related to community solar. APS cannot predict the outcomes of these future activities.

On July 1, 2022, APS filed its 2023 RES Implementation Plan, and on November 10, 2022, the ACC approved the 2023 RES Implementation Plan, including APS’s requested waiver of the distributed energy requirement for 2023. The following table summarizes the RES requirement standard (not including the additional commitment required by the 2009 Settlement Agreement) and its timing:
 20232025
RES (inclusive of distributed energy) as a percent of retail electric sales13%15%
Percent of RES to be supplied from distributed renewable energy resources (a)30%30%
(a)The distributed renewable energy requirement has been waived for 2023.
  2020 2025
RES (inclusive of distributed energy) as a % of retail electric sales 10% 15%
Percent of RES to be supplied from distributed energy resources 30% 30%


On April 21, 2015, the RES rules were amended to require utilities to report on all eligible renewable resources in their service territory, irrespective of whether the utility owns renewable energy credits associated with such renewable energy. The rules allow the ACC to consider such information in determining whether APS has satisfied the requirements of the RES. See "Energy Modernization Plan" in Note 4 for information regarding an additional renewable energy standards proposal.

Renewable Energy Portfolio. To date, APS has a diverse portfolio of existing and planned renewable resources totaling 1,923 MW, including solar, wind, geothermal, biomass and biogas.  Of this portfolio, 1,828 MW are currently in operation and 95 MW are under contract for development or are under construction.  Renewable resources in operation include 240 MW of facilities owned by APS, 626 MW of long-term purchased power agreements, and an estimated 962 MW of customer-sited, third-party owned distributed energy resources.
APS’s strategy to achieve its RES requirements includes executing purchased power contracts for new facilities, ongoing development of distributed energy resources and procurement of new facilities to be owned by APS.  See "Energy Sources and Resource Planning - Generation Facilities - Solar Facilities" above for information regarding APS-owned solar facilities.

The following table summarizes APS’s renewable energy sources currently in operation and under development as of December 31, 2019.  Agreements for the development and completion of future resources are subject to various conditions, including successful siting, permitting and interconnection of the projects to the electric grid.

  Location 
Actual/
 Target
Commercial
Operation
Date
 
Term
(Years)
 
Net
 Capacity
 In Operation
(MW AC)
 
Net Capacity
 Planned/Under
Development
(MW AC)
 
APS Owned      
  
  
 
Solar:      
  
  
 
AZ Sun Program:      
  
  
 
Paloma Gila Bend, AZ 2011  
 17
  
 
Cotton Center Gila Bend, AZ 2011  
 17
  
 
Hyder Phase 1 Hyder, AZ 2011  
 11
  
 
Hyder Phase 2 Hyder, AZ 2012  
 5
  
 
Chino Valley Chino Valley, AZ 2012  
 19
  
 
Hyder II Hyder, AZ 2013  
 14
  
 
Foothills Yuma, AZ 2013  
 35
  
 
Gila Bend Gila Bend, AZ 2014  
 32
   
Luke AFB Glendale, AZ 2015   10
   
Desert Star Buckeye, AZ 2015   10
   
Subtotal AZ Sun Program      
 170
 
 
Multiple Facilities AZ Various  
 4
  
 
Red Rock Red Rock, AZ 2016   40
   
Distributed Energy:      
  
  
 
APS Owned (a) AZ Various  
 26
   
Total APS Owned      
 240
 
 
Purchased Power Agreements      
  
  
 
Solar:      
  
  
 
Solana Gila Bend, AZ 2013 30
 250
  
 
RE Ajo Ajo, AZ 2011 25
 5
  
 
Sun E AZ 1 Prescott, AZ 2011 30
 10
  
 
Saddle Mountain Tonopah, AZ 2012 30
 15
  
 
Badger Tonopah, AZ 2013 30
 15
  
 
Gillespie Maricopa County, AZ 2013 30
 15
  
 
Solar + Energy Storage:           
  First Solar Arlington, AZ 2021 15
   50
 
Wind:      
  
  
 
Aragonne Mesa Santa Rosa, NM 2006 20
 90
  
 
High Lonesome Mountainair, NM 2009 30
 100
  
 
Perrin Ranch Wind Williams, AZ 2012 25
 99
  
 
Geothermal:      
  
  
 
Salton Sea Imperial County, CA 2006 23
 10
  
 
Biomass:      
  
  
 
Snowflake Snowflake, AZ 2008 15
 14
  
 
Biogas:      
  
  
 
NW Regional Landfill Surprise, AZ 2012 20
 3
  
 
Total Purchased Power Agreements      
 626
 50
 
Distributed Energy      
  
  
 
Solar (b)
      
  
  
 
Third-party Owned AZ Various  
 929
 45
 
Agreement 1 Bagdad, AZ 2011 25
 15
  
 
Agreement 2 AZ 2011-2012 20-21
 18
  
 
Total Distributed Energy      
 962
 45
 
Total Renewable Portfolio      
 1,828
 95
 


(a)
Includes Flagstaff Community Power Project, APS School and Government Program, APS Solar Partner Program, and APS Solar Communities Program.
(b)Includes rooftop solar facilities owned by third parties. Distributed generation is produced in DC and is converted to AC for reporting purposes.

Demand Side Management

 In December 2009,On January 1, 2011, Arizona regulators placedadopted an increased focus onEES of 22% cumulative annual energy savings by 2020 to increase energy efficiency and other demand side managementDSM programs to encourageencouraging customers to conserve energy, while incentivizing utilities to aid in these efforts that ultimately reduce the demand for energy. The ACC initiated its Energy Efficiency rulemaking, with a proposedAPS achieved the 22% EES of 22% cumulative annual energy savings by 2020.  This standard was adopted and became effective on January 1, 2011.  This standard will likely impact Arizona’s future energy resource needs.  (Seein 2021. See Note 43 for information regarding energy efficiency, other DSM obligations and other demand side management obligations).

the Energy Modernization Plan.

Competitive Environment and Regulatory Oversight
 
Retail
 
The ACC regulates APS’s retail electric rates and its issuance of securities.  The ACC must also approve any significant transfer or encumbrance of APS’s property used to provide retail electric service and approve or receive prior notification of certain transactions between Pinnacle West, APS, and their respective affiliates. (SeeSee Note 43 for information regarding ACC'sACC’s regulation of APS'sAPS’s retail electric rates.)
 
APS is subject to varying degrees of competition from other investor-owned electric and gas utilities in Arizona (such as Southwest Gas Corporation), as well as cooperatives, municipalities, electrical districts, and similar types of governmental or non-profit organizations.  In addition, some customers, particularly industrial and large commercial customers, may own and operate generation facilities to meet
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some or all of their own energy requirements.  This practice is becoming more popular with customers installing or having installed products such as rooftop solar panels to meet or supplement their energy needs.
 
On May 9, 2013, the ACC voted to re-examine the facilitation of a deregulated retail electric market in Arizona.  The ACC subsequently opened a docket for this matter and received comments from a number of interested parties on the considerations involved in establishing retail electric deregulation in the state.  One of these considerations was whether various aspects of a deregulated market, including setting utility rates on a “market” basis, would be consistent with the requirements of the Arizona Constitution.  On September 11, 2013, after receiving legal advice from the ACC staff,Staff, the ACC voted 4-1 to close the current docket and await full Arizona Constitutional authority before any further examination of this matter.  The motion approved by the ACC also included opening one or more new dockets in the future to explore options to offer more rate choices to customers and innovative changes within the existing cost-of-service regulatory model that could include elements of competition. The ACC opened a docket on November 4, 2013 to explore technological advances and innovative changes within the electric utility industry.  A series of workshops in this docket were held in 2014 and another in February of 2015.

On November 17, 2018, the ACC voted to re-examine the facilitation of a deregulated retail electric market in Arizona. An ACC special open meeting workshop was held on December 3, 2018. No substantive action was taken, but interested parties were asked to submit written comments and respond to a list of questions from ACC Staff. On July 1 and July 2, 2019, ACC Staff issued a report and initial proposed draft rules regarding possible modifications to the ACC’s retail electric competition rules. Interested parties filed comments to the ACC Staff report and a stakeholder meeting and workshop to discuss the retail electric competition rules and energy modernization plan proposals was held on July 30, 2019. ACC Commissioners submitted additional questions regarding this matter. On February 10, 2020, two ACC Commissioners filed

two sets of draft proposed retail electric competition rules. On February 12, 2020, ACC staffStaff issued its second report regarding possible modifications to the ACC’s retail electric competition rules. During a July 15, 2020 ACC Staff meeting, the ACC Commissioners discussed the possible development of a retail competition pilot program, but no action was taken. The ACC has scheduled a workshop for February 25-26, 2020 for further consideration and discussion of the continues to discuss matters related to retail electric competition, rules.including the potential for additional buy-through programs or other pilot programs. In April 2022, the Arizona Legislature passed and the Governor signed a bill that repealed the electric deregulation law that had been in place in Arizona since 1998. APS cannot predict whether these effortswhat impact, if any, this change will resulthave on APS.

On August 4, 2021, Green Mountain Energy filed an application seeking a certificate of convenience and necessity to allow it to provide competitive electric generation service in any changesArizona.Green Mountain Energy has requested that the ACC grant it the ability to provide competitive service in APS’s and if changesTucson Electric Power Company’s certificated service territories and proposes to deliver a 100% renewable energy product to residential and general service customers in those service territories. APS opposes Green Mountain Energy’s application and intends to intervene to contest it. On November 3, 2021, the ACC submitted questions to the rules results, what impactOffice of the Arizona Attorney General, Civil Litigation Division, Consumer Protection & Advocacy Section (“Attorney General”) requesting legal opinions related to a number of issues surrounding retail electric competition and the ACC’s ability to issue competitive certificates convenience and necessity. On November 26, 2021, the Administrative Law Judge issued a procedural order indicating it would not be appropriate to set a schedule until the Attorney General has provided insights on the applicable law.

On October 28, 2021, an ACC Commissioner docketed a letter directing ACC Staff and interested stakeholders to design a 200-300 MW pilot program that would allow residential and small commercial customers of APS to elect a competitive electricity supplier. The letter also states that similar programs should be designed for other Arizona regulated electric utilities. APS cannot predict the outcome of these rules would have on APS.

future activities.

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Wholesale
 
FERC regulates rates for wholesale power sales and transmission services.  (SeeSee Note 43 for information regarding APS’s transmission rates.)  During 2019,2022, approximately 5.3%11.6% of APS’s electric operating revenues resulted from such sales and services.  APS’s wholesale activity primarily consists of managing fuel and purchased power supplies to serve retail customer energy requirements.  APS also sells, in the wholesale market, its generation output that is not needed for APS’s Native Load and, in doing so, competes with other utilities, power marketers and independent power producers.  Additionally, subject to specified parameters, APS hedges both electricity and fuels.natural gas.  The majority of these activities are undertaken to mitigate risk in APS’s portfolio.

Transmission and Delivery

APS continues to work closely with customers, stakeholders, and regulators to identify and plan for transmission needs that support new customers, system reliability, access to markets and clean energy development.  The capital expenditures table presented in the "Liquidity“Liquidity and Capital Resources"Resources” section of Management'sManagement’s Discussion and Analysis of Financial Condition and Results of Operations in Item 7 of this report includes new APS transmission projects, along with other transmission costs for upgrades and replacements, including those for data center and semi-conductor manufacturing development.  APS is also working to establish and expand advanced grid technologies throughout its service territory to provide long-term benefits both to APS and its customers.  APS is strategically deploying a variety of technologies that are intended to allow customers to better manage their energy usage, minimize system outage durations and frequency, enable customer choice for new customer sited technologies, and facilitate greater cost savings to APS through improved reliability and the automation of certain distributiondelivery functions.

Environmental Matters

Climate Change

Climate Change

Legislative Initiatives. There have been no recent successful attempts by Congress to pass legislation that would regulate GHG emissions, and it is unclear at this time whether pending climate-change related legislation regulating or limiting utility-sector GHG emissions under consideration in the 116th118th Congress will be considered in the Senate and then signed into law by President Trump.become law. In the event climate change legislation ultimately passes, the actual economic and operational impact of such legislation on APS depends on a variety of factors, none of which can be fully known until a law is written, and enacted, and the specifics of the resulting program are established. These factors include, without limitation, the terms of the legislation with regard to allowed GHG emissions; the cost to reduce emissions; in the event a cap-and-trade program is established, whether any permitted emissions allowances will be allocated to source operators free of cost or auctioned (and, if so, the cost of those allowances in the marketplace) and whether offsets and other measures to moderate the costs of compliance will be available; and, in the event of a carbon tax, the amount of the tax per pound of carbon dioxide (“CO2”CO2) equivalent emitted.

In addition to federal legislative initiatives, state-specific initiatives may also impact our business. While Arizona has no pending legislation and no proposed agency rule regulating GHGs, in Arizona at this time, the California legislature enacted AB 32 and SB 1368 in 2006 to address GHG emissions. In October

2011, the California Air Resources Board approved final regulations that established a state-wide cap on GHG emissions beginning on January 1, 2013, and established a GHG allowance trading program under that cap. The first phase of the program, which applies to, among other entities, importers of electricity, commenced on January 1, 2013. Under the program, entities selling electricity into California, including APS, must hold carbon allowances to cover
20

GHG emissions associated with electricity sales into California from outside the state. APS is authorized to recover the cost of these carbon allowances through the PSA.

Regulatory Initiatives. In 2009, EPA determined that GHG emissions endanger public health and welfare. As a result of this “endangerment finding,” EPA determined that the Clean Air Act required new regulatory requirements for new and modified major GHG emitting sources, including power plants. APS will generally be required to consider the impact of GHG emissions as part of its traditional New Source Review ("NSR") analysis for new major sources and major modifications to existing plants.

On June 19, 2019, EPA took final action on its proposals to repeal EPA'sEPA’s 2015 Clean Power Plan (“CPP”) and replace those regulations with a new rule, the Affordable Clean Energy (“ACE”) regulations. EPA originally finalized the CPP on August 3, 2015, and those regulationssuch rules would have had been stayed pending judicial review.

Thefar broader impact on the electric power sector than the ACE regulations. On January 19, 2021, the U.S. Court of Appeals for the D.C. Circuit vacated the ACE regulations are based upon measures that can be implementedand remanded them back to improveEPA to develop new existing power plant carbon regulations consistent with the heat ratecourt’s ruling. That decision, which endorsed an expansive view of steam-electricthe federal Clean Air Act consistent with EPA’s 2015 CPP, was subsequently reversed by the U.S. Supreme Court on June 30, 2022. While the current administration has expressed its intent to develop new carbon emission regulations governing existing power plants specifically coal-fired EGUs. In contrast withsometime in 2023, such action will be constrained by the U.S. Supreme Court’s decision that the CPP EPA's ACE regulations would not involve utility-level generation dispatch shifting away from coal-fired generation and toward renewable energy resources and natural gas-fired combined cycle power plants. EPA’s ACE regulations provide states and EPA regions (e.g.,violated the Navajo Nation) with three years to develop plans establishing source-specific standards of performance based upon application of the ACE rule’s heat-rate improvement emission guidelines. While corresponding NSR reform regulations were proposed as part of EPA’s initial ACE proposal, the finalized ACE regulations did not include such reform measures. EPA announced that it will be taking final action on EPA's NSR reform proposal for EGUs in the near future.

WeClean Air Act. Nonetheless, we cannot at this time predict the outcome of EPA's regulatory actions repealingpending EPA rulemaking proceedings related to carbon emissions from existing power plants.

Other environmental rules that could involve material compliance costs include those related to effluent limitations, the ozone national ambient air quality standards (“NAAQS”) and replacingother rules or matters involving the CPP. Various state governments, industry organizations,Clean Air Act, Clean Water Act, Endangered Species Act, RCRA, Superfund, the Navajo Nation, and water supplies for our power plants. The financial impact of complying with current and future environmental and public-health public interest groups have filed lawsuitsrules could jeopardize the economic viability of our coal plants or the willingness or ability of power plant participants to fund any required equipment upgrades or continue their participation in these plants. The economics of continuing to own certain resources, particularly our fossil-fuel powered plants, may deteriorate, warranting early retirement of those plants, which may result in asset impairments. APS would seek recovery in rates for the book value of any remaining investments in the D.C. Circuit challenging the legality of EPA’s action, both, in repealing the CPP and issuing the ACE regulations. In addition,plants as well as other costs related to the extent that the ACE regulations go into effect as finalized,early retirement but cannot predict whether it is not yet clear how the state of Arizona or EPA will implement these regulations as applied to APS’s coal-fired EGUs. In light of these uncertainties, APS is still evaluating the impact of the ACE regulations on its coal-fired generation fleet.would obtain such recovery.
EPA Environmental Regulation

Regional Haze Rules. In 1999, EPA announced regional haze rules to reduce visibility impairment in national parks and wilderness areas. The rules require states (or, for sources located on tribal land, EPA) to determine what pollution control technologies constitute the BART for certain older major stationary sources, including fossil-firedfossil-fuel fired power plants. EPA subsequently issued the Clean Air Visibility Rule, which provides guidelines on how to perform a BART analysis. Final regulations imposing BART requirements have now been imposed on each APS coal-fired power plant. Four Corners was required to install new pollution controls to comply with BART, while similar pollution control installation requirements were not necessary for Cholla.

Cholla. APS believed that EPA’s original 2012In early 2017, EPA approved a final rule establishing controls constituting BART for Cholla, which would require installation of selective catalytic reduction ("SCR") controls, was unsupported and that EPA had no basis for disapprovingcontaining a revision to Arizona’s State Implementation Plan ("SIP"(“SIP”) and promulgating a Federal Implementation Plan ("FIP")for Cholla that was inconsistentimplemented BART requirements for this facility, which did not require the installation of any new pollution control capital improvements.In conjunction with the state’s considered BART determinations

under the regional haze program.  In September 2014, APS met with EPA to propose a compromise BART strategy, whereby APS would permanently closeclosure of Cholla Unit 2 and cease burningin 2015, APS has committed to ceasing coal atcombustion within Units 1 and 3 by
21

April 2025.PacifiCorp retired Cholla Unit 4 at the mid-2020s. (See "Cholla"end of 2020. See “Cholla” in Note 43 for information regarding future plans for Cholla and details related to the resulting regulatory asset.) APS made the proposal with the understanding that additional emission control equipment is unlikely to be required in the future because retiring and/or converting the units as contemplated in the proposal is more cost effective than, and will result in increased visibility improvement over, the BART requirements for oxides of nitrogen ("NOx") imposed through EPA's BART FIP. In early 2017, EPA approved a final rule incorporating APS's compromise proposal, which took effect for Cholla on April 26, 2017.
    
Four Corners. Based on EPA’s final standards, APS'sAPS’s 63% share of the cost of required BART controls for Four Corners Units 4 and 5 was approximately $400 million, which has been incurred.  (SeeSee Note 43 for information regarding the related rate recovery.) In addition, APS and El Paso entered into an asset purchase agreement providing for the purchase by APS, or an affiliate of APS, of El Paso'sPaso’s 7% interest in Four Corners Units 4 and 5. 4CA purchased the El Paso interest on July 6, 2016. NTEC purchased the interest from 4CA on July 3, 2018. (See "Four Corners - 4CA Matter" in Note 11 for a discussion of the NTEC purchase.) The cost of the pollution controls related to the 7% interest is approximately $45 million, which was assumed by NTEC through its purchase of the 7% interest.

Coal Combustion Waste. On December 19, 2014, EPA issued its final regulations governing the handling and disposal of CCR, such as fly ash and bottom ash. The rule regulates CCR as a non-hazardous waste under Subtitle D of the Resource Conservation and Recovery Act ("RCRA")RCRA and establishes national minimum criteria for existing and new CCR landfills and surface impoundments and all lateral expansions. These criteria include standards governing location restrictions, design and operating criteria, groundwater monitoring and corrective action, closure requirements and post closure care, and recordkeeping, notification, and internet posting requirements. The rule generally requires any existing unlined CCR surface impoundment that is contaminating groundwater above a regulated constituent’s groundwater protection standard to stop receiving CCR and either retrofit or close, and further requires the closure of any CCR landfill or surface impoundment that cannot meet the applicable performance criteria for location restrictions or structural integrity. Such closure requirements are deemed "forced closure"“forced closure” or "closure“closure for cause"cause” of unlined surface impoundments and are the subject of recent regulatory and judicial activities described below.

Since these regulations were finalized, EPA has taken steps to substantially modify the federal rules governing CCR disposal. While certain changes have been prompted by utility industry petitions, others have resulted from judicial review, court-approved settlements with environmental groups, and statutory changes to RCRA. The following lists the pending regulatory changes that, if finalized, could have a material impact as to how APS manages CCR at its coal-fired power plants:

Following the passage of the Water Infrastructure Improvements for the Nation Act in 2016, EPA possesses authority to either authorize states to develop their own permit programs for CCR management or issue federal permits governing CCR disposal both in states without their own permit programs and on tribal lands. Although ADEQ has taken steps to develop a CCR permitting program, including supporting the passage of new state legislation providing ADEQ with appropriate permitting authority for CCR under the state solid waste management program, it is not clear when that program will be put into effect. On December 19, 2019, EPA proposed its own set of regulations governing the issuance of CCR management permits. The proposal remains pending.

On March 1, 2018, as a result of a settlement with certain environmental groups, EPA proposed adding boron to the list of constituents that trigger corrective action requirements to remediate groundwater impacted by CCR disposal activities. Apart from a subsequent proposal issued on August 14, 2019, to add a specific, health-based groundwater protection standard for boron, EPA has yet to take action on this proposal.


BasedWith respect to APS’s Cholla facility, the Company’s application for alternative closure was submitted to EPA on an August 21, 2018 D.C. Circuit decision, which vacated and remanded those provisionsNovember 30, 2020. While EPA has deemed APS’s application administratively “complete,” the Agency’s approval remains pending. If granted, this application would allow the continued disposal of the EPA CCR regulations that allow for the operation ofwithin Cholla’s existing unlined CCR surface impoundments EPA recently proposed corresponding changes to federal CCR regulations. On November 4, 2019, EPA proposed that all unlined CCR surface impoundments, regardlessuntil the required date for ceasing coal-fired boiler operations in April 2025. This
22


On November 4, 2019, EPA also proposed to change the manner by which facilities that have committed to cease burning coal in the near-term may qualify for alternative closure. Such qualification would allow CCR disposal units at these plants to continue operating, even though they would otherwiseapplication will be subject to forced closure underpublic comment and, potentially, judicial review. On January 11, 2022, EPA began issuing proposed decisions pursuant to this provision of the federal CCR regulations. EPA’s proposal regarding alternative closure would require express EPA authorization for such facilitiesregulations and APS anticipates receiving a proposed decision with respect to continue operating their CCR disposal units under alternative closure.the Cholla facility in 2023.

We cannot at this time predict the outcome of these regulatory proceedings or when the EPA will take final action. action on those matters that are still pending.Depending on the eventual outcome, the costs associated with APS’s management of CCR could materially increase, which could affect APS’s financial position, results of operations, or cash flows.

APS currently disposes of CCR in ash ponds and dry storage areas at Cholla and Four Corners.APS estimates that its share of incremental costs to comply with the CCR rule for Four Corners is approximately $22$30 million and its share of incremental costs to comply with the CCR rule for Cholla is approximately $15$16 million.The Navajo Plant currently disposesdisposed of CCR only in a dry landfill storage area.To comply with the CCR rule for the Navajo Plant, APS'sAPS’s share of incremental costs iswas approximately $1 million, which has been incurred.Additionally, the CCR rule requires ongoing, phased groundwater monitoring.

As of October 2018, APS has completed the statistical analyses for its CCR disposal units that triggered assessment monitoring. APS determined that several of its CCR disposal units at Cholla and Four Corners will need to undergo corrective action. In addition, under the current regulations, all such disposal units must ceasehave ceased operating and initiateinitiated closure by October 31, 2020.April 11, 2021, at the latest (except for those disposal units subject to alternative closure). APS initiated an assessmentcompleted the assessments of corrective measures on JanuaryJune 14, 20192019; however, additional investigations and expects such assessmentengineering analyses that will continue through mid- to late-2020. As part of this assessment, APS continues to gather additional groundwater data and perform remedial evaluations as tosupport the CCR disposal units at Cholla and Four Corners undergoing corrective action.remedy selection are still underway. In addition, APS will also solicit input from the public and host public hearings and select remedies as part of this process. Based on the work performed to date, APS currently estimates that its share of corrective action and monitoring costs at Four Corners will likely range from $10 million to $15 million, which would be incurred over 30 years. The analysis needed to perform a similar cost estimate for Cholla remains ongoing at this time. As APS continues to implement the CCR rule’s corrective action assessment process, the current cost estimates may change. Given uncertainties that may exist until we have fully completed the corrective action assessment process, we cannot predict any ultimate impacts to the Company; however, at this time we do not believe the cost estimates for Cholla and any potential change to the cost estimate for Four Corners would have a material impact on our financial position, results of operations, or cash flows.

Effluent Limitation Guidelines. On September 30, 2015, EPA finalized revised effluent limitation guidelines (“ELG”) establishing technology-based wastewater discharge limitations for fossil-fired EGUs.  EPA’s final regulation targets metals and other pollutants in wastewater streams originating from fly ash and bottom ash handling activities, scrubber activities, and coal ash disposal leachate.  Based upon an earlier set of preferred alternatives, the final effluent limitations generally require chemical precipitation and biological treatment for flue gas desulfurization scrubber wastewater, “zero discharge” from fly ash and bottom ash handling, and impoundment for coal ash disposal leachate. 


On August 11, 2017, EPA announced that it would be initiating rulemaking proceedings to potentially revise the September 2015 effluent limitation guidelines.ELGs. On September 18, 2017, EPA finalized a regulation postponing the earliest date on which compliance with the effluent limitation guidelinesELGs for these waste-streams would be required from November 1, 2018, until November 1, 2020. In addition,At this time, APS’s National Pollutant Discharge Elimination System (“NPDES”) discharge permit for Four Corners contains a December 31, 2023,
23

compliance deadline for achieving “zero discharge” of bottom ash transport waters. Nonetheless, on November 22, 2019,October 13, 2020, EPA published a proposedfinal rule relaxing thethese “zero discharge” limitations for bottom-ashbottom ash handling water and allowing for approximately 10% of such wastewater to be discharged (on a volumetric, 30-day rolling average basis) subjectunder limited power plant operating scenarios. At this time, APS is pursuing a modification to best-professional judgment effluent limits.the Four Corners NPDES discharge permit in order to implement the most recent ELG rulemaking. We cannot at this time predict the outcome of this rulemaking proceeding. Nonetheless, we expect that compliance with the resulting limitations will be required in connection with National Pollution Discharge Elimination System ("NPDES") discharge permit renewals at Four Corners (see "Four Corners National Pollutant Discharge Elimination System Permit," below, for more details).  For the current NPDESmodification proceeding, including any public commenting or permit issued to Four Corners, which is subject to an appeal by various environmental groups, the plant must comply with the existing “zero discharge” effluent limitation guidelines for bottom-ash transport wastewater by December 31, 2023. If those guidelines are changed, it is unclear when Four Corners would need to demonstrate compliance with any updated or revised standards.procedures. The Cholla and the Navajo Plant dofacility does not require NPDES permitting.

Ozone National Ambient Air Quality Standards. On October 1, 2015, EPA finalized revisions to the primary ground-level ozone national ambient air quality standards (“NAAQS”)NAAQS at a level of 70 parts per billion (“ppb”).  Further, on December 23, 2020, EPA issued a final regulation retaining the current primary NAAQS for ozone, following a required scientific review process. With ozone standards becoming more stringent, our fossil generation units will come under increasing pressure to reduce emissions of NOx and volatile organic compounds, and to generate emission offsets for new projects or facility expansions located in ozone nonattainment areas.  EPA was expected to designate attainment and nonattainment areas relative to the new 70 ppb standard by October 1, 2017.  While EPA took action designating attainment and unclassifiable areas on November 6, 2017, the Agency'sAgency’s final action designating non-attainment areas was not issued until April 30, 2018. At that time, EPA designated the geographic areas containing Yuma and Phoenix, Arizona as in non-attainment with the 2015 70 ppb ozone NAAQS. The vast majority of APS'sAPS’s natural gas-fired EGUs are located in these jurisdictions. Areas of Arizona and the Navajo Nation where the remainder of APS'sAPS’s fossil-fuel fired EGU fleet is located were designated as in attainment. We anticipate that revisions to the SIPs and FIPs implementing required controls to achieve the new 70 ppb standard will be in place between 2023 and 2024.  At this time, because proposed SIPs and FIPs implementing the revised ozone NAAQSs have yet to be released, APS is unable to predict what impact the adoption of these standards may have on the Company. APS will continue to monitor these standards as they are implemented within the jurisdictions affecting APS.

Superfund-Related Matters. The Comprehensive Environmental Response Compensation and Liability Act ("CERCLA"(“CERCLA” or "Superfund"“Superfund”) establishes liability for the cleanup of hazardous substances found contaminating the soil, water, or air.  Those who released, generated, transported to, or disposed of hazardous substances at a contaminated site are among the parties who are potentially responsible ("PRPs"(each a “PRP”). PRPs may be strictly, and often are jointly, and severally liable for clean-up. On September 3, 2003, EPA advised APS that EPA considers APS to be a PRP in the Motorola 52nd Street Superfund Site, Operable Unit 3 ("OU3"(“OU3”) in Phoenix, Arizona. APS has facilities that are within this Superfund site. APS and Pinnacle West have agreed with EPA to perform certain investigative activities of the APS facilities within OU3. In addition, on September 23, 2009, APS agreed with EPA and one other PRP to voluntarily assist with the funding and management of the site-wide groundwater remedial investigation and feasibility study ("(“RI/FS"FS”). The RI/FS for OU3.  Based upon discussions betweenOU3 was finalized and submitted to EPA at the OU3 working group parties andend of 2022. APS cannot predict the EPA alongs timing with the results of recent technical analyses prepared by the OU3 working grouprespect to supplement the RI/FS,this matter. APS anticipates finalizing the RI/FS in the spring or summer of 2020. We estimateestimates that our costsits cost related to this investigation and study will beis approximately $2$3 million. We anticipateAPS anticipates incurring additional expenditures in the future, but because the overall investigation is not complete and ultimate remediation requirements are not yet finalized by EPA, at the present time, expenditures related to this matter cannot be reasonably estimated.


On August 6, 2013, the Roosevelt Irrigation District ("RID"(“RID”) filed a lawsuit in Arizona District Court against APS and 24 other defendants, alleging that RID’s groundwater wells were contaminated by the release of hazardous substances from facilities owned or operated by the defendants.  The lawsuit also alleges that, under Superfund laws, the defendants are jointly and severally liable to RID.  The allegations against APS arise out of APS’s current and former ownership of facilities in and around OU3.  As part of a
24

state governmental investigation into groundwater contamination in this area, on January 25, 2015, ADEQ sent a letter to APS seeking information concerning the degree to which, if any, APS’s current and former ownership of these facilities may have contributed to groundwater contamination in this area.  APS responded to ADEQ on May 4, 2015. On December 16, 2016, two RID environmental and engineering contractors filed an ancillary lawsuit for recovery of costs against APS and the other defendants in the RID litigation. That same day, another RID service provider filed an additional ancillary CERCLA lawsuit against certain of the defendants in the main RID litigation but excluded APS and certain other parties as named defendants. Because the ancillary lawsuits concern past costs allegedly incurred by these RID vendors, which were ruled unrecoverable directly by RID in November of 2016, the additional lawsuits do not increase APS'sAPS’s exposure or risk related to these matters.

On April 5, 2018, RID and the defendants in that particular litigation executed a settlement agreement, fully resolving RID'sRID’s CERCLA claims concerning both past and future cost recovery. APS'sAPS’s share of this settlement was immaterial. In addition, the two environmental and engineering vendors voluntarily dismissed their lawsuit against APS and the other named defendants without prejudice. An order to this effect was entered on April 17, 2018. With this disposition of the case, the vendors may file their lawsuit again in the future. On August 16, 2019, Maricopa County, one of the three direct defendants in the ancillary service provider lawsuit, filed a third-party complaint seeking contribution for its liability, if any, from APS and 28 other third-party defendants. While this lawsuit remains pending, on September 30, 2022, the U.S. District Court for the District of Arizona granted partial summary judgment to the direct defendants for $20.6 million of the $21 million in CERCLA response costs claimed by the service provider. We are unable to predict the outcome of these matters;any further litigation related to the remaining response costs at issue in this litigation; however, we do not expect the outcome to have a material impact on our financial position, results of operations, or cash flows.

On February 28, 2022, EPA provided APS with a request for information under CERCLA related to APS’s Ocotillo power plant site located in Tempe, Arizona. In particular, EPA seeks information from APS regarding APS’s use, storage, and disposal of substances containing per-and polyfluoroalkyl (“PFAS”) compounds at the Ocotillo power plant site in order to aid EPA’s investigation into actual or threatened releases of PFAS into groundwater within the South Indian Bend Wash (“SIBW”) Superfund site. The SIBW Superfund site includes the APS Ocotillo power plant site. APS filed its response to this information request on April 29, 2022. On January 17, 2023, EPA contacted APS to inform APS that it would be commencing on-site investigations within the SIBW site, including the Ocotillo power plant, and performing a remedial investigation and feasibility study related to potential PFAS impacts to groundwater over the next two to three years. At the present time, we are unable to predict the outcome of this matter and expenditures related to this matter cannot be reasonably estimated.

Manufactured Gas Plant Sites. Certain properties which APS now owns or which were previously owned by it or its corporate predecessors were at one time sites of, or sites associated with, manufactured gas plants. APS is taking action to voluntarily remediate these sites. APS does not expect these matters to have a material adverse effect on its financial position, results of operations, or cash flows.

Federal Agency Environmental Lawsuit Related to Four Corners

See "Business of Arizona Public Service Company - Energy Sources and Resource Planning - Generation Facilities - Coal-Fueled Generating Facilities - Four Corners" above for information regarding the lawsuit against OSM and other federal agencies in connection with their issuance of approvals necessary to extend the operation of Four Corners and the adjacent mine. 

Four Corners National Pollutant Discharge Elimination System ("NPDES") Permit


On July 16, 2018, several environmental groups filed a petition for review before the EPA Environmental Appeals Board ("EAB"(“EAB”) concerning the NPDES wastewater discharge permit for Four Corners, which was reissued on June 12, 2018.The environmental groups allege that the permit was reissued in contravention of several requirements under the Clean Water Act and did not contain required provisions concerning EPA’s 2015 revised effluent limitation guidelinesELGs for steam-electric EGUs, 2014 existing-source
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regulations governing cooling-water intake structures, and effluent limits for surface seepage and subsurface discharges from coal-ash disposal facilities.To address certain of these issues through a reconsidered permit, EPA took action on December 19, 2018, to withdraw the NPDES permit reissued in June 2018.Withdrawal of the permit moots the EAB appeal, and EPA filed a motion to dismiss on that basis.The EAB thereafter dismissed the environmental group appeal on February 12, 2019.EPA then issued a revised final NPDES permit for Four Corners on September 30, 2019. This permit is now subject to a petition for review before the

EPA EAB, basedBased upon a November 1, 2019, filing by several environmental groups. We cannot predictgroups, the outcomeEAB again took up review of the Four Corners NPDES Permit.Oral argument on this appeal was held on September 3, 2020, and the EAB denied the environmental group petition on September 30, 2020. While on January 22, 2021, the environmental groups filed a petition for review of the EAB’s decision with the U.S. Court of Appeals for the Ninth Circuit, the parties to this litigation (including APS) finalized a settlement on May 2, 2022. This settlement requires investigation of thermal wastewater discharges from Four Corners, administratively closes the litigation filed in January of 2021, and whether the review willis not expected to have a material impact on ourAPS’s financial position, results of operations, or cash flows.

Navajo Nation Environmental Issues

Water Supply
Four Corners and the Navajo Plant are located
Based on the Navajo Reservation and are held under rights of way granted by the federal government, as well as leasesa declaration from the Navajo Nation. See “Energy Sources and Resource Planning - Generation Facilities - Coal-Fueled Generating Facilities” above for additional information regarding these plants.

In July 1995, the Navajo Nation enacted the Navajo Nation Air Pollution Prevention and Control Act, the Navajo Nation Safe Drinking Water Act, and the Navajo Nation Pesticide Act (collectively, the “Navajo Acts”). The Navajo Acts purportU.S. Bureau of Reclamation, as of January 1, 2023, Arizona’s supply of Colorado River water will be subject to give the Navajo Nation Environmental Protection Agency authoritya Tier 2a shortage. This shortage will result in a reduction to promulgate regulations covering air quality, drinking water, and pesticide activities, including those activities that occur at Four Corners and the Navajo Plant. On October 17, 1995, the Four Corners participants and the Navajo Plant participants each filed a lawsuit in the District CourtArizona’s share of the Navajo Nation, Window Rock District, challenging the applicability of the Navajo Acts as to Four Corners and the Navajo Plant. The Court has stayed these proceedings pursuant to a requestColorado River water by the parties, and the parties are seeking to negotiate a settlement.

In April 2000, the Navajo Nation Council approved operating permit regulations under the Navajo Nation Air Pollution Prevention and Control Act. APS believes the Navajo Nation exceeded its authority when it adopted the operating permit regulations. On July 12, 2000, the Four Corners participants and the Navajo Plant participants each filed a petition with the Navajo Supreme Court for review of these regulations. Those proceedings have been stayed, pending the settlement negotiations mentioned above. APS cannot currently predict the outcome of this matter.

On May 18, 2005, APS, SRP, as the operating agent for the Navajo Plant, and the Navajo Nation executed a Voluntary Compliance Agreement to resolve their disputes regarding the Navajo Nation Air Pollution Prevention and Control Act. As a result of this agreement, APS sought, and the courts granted, dismissal of the pending litigation in the Navajo Nation Supreme Court and the Navajo Nation District Court,22 percent or 592,000-acre feet. This reduction, similar to the extent2022 tier 1 shortage, will largely be felt by central Arizona’s agricultural users, mainly in Pinal County. In light of pre-existing mitigation measures at the claims relatestate level, the Tier 2a shortage is not expected at this time to materially impact water supplies for customers in APS’s service territory, nor materially impact water supplies used by APS’s fleet of generation resources. As drought conditions across the Clean Air Act. The agreement does not address or resolve any dispute relatingsouthwestern U.S. region continue to other Navajo Acts.worsen, APS cannot currently predict the outcome of this matter.

will monitor water availability necessary for continued Company operations and, as necessary, implement measures to mitigate risks associated with future Colorado River shortage declarations.

Water Supply

Assured supplies of water are important for APS’s generating plants. At the present time, APS has adequate water to meet its operating needs. The Four Corners region, in which Four Corners is located, has historically experienced drought conditions that may affect the water supply for the plants if adequate moisture is not received in the watershed that supplies the area. However, during the past 12 months the region has received snowfall and precipitation sufficient to recover the Navajo Reservoir to an optimum operating level, reducing the probability of shortage in future years. Although the watershed and reservoirs are in a good condition at this time, APS is continuing to work with area stakeholders to implement agreements to minimize the effect, if any, on future drought conditions that could have an impact on operations of its plants.

Conflicting claims to limited amounts of water in the southwestern United States have resulted in numerous court actions, which, in addition to future supply conditions, have the potential to impact APS’s operations.


San Juan River Adjudication. Both groundwater and surface water in areas important to APS’s operations have been the subject of inquiries, claims, and legal proceedings, which will require a number of years to resolve. APS is one of a number of parties in a proceeding, filed March 13, 1975, before the Eleventh Judicial District Court in New Mexico to adjudicate rights to a stream system from which water for Four Corners is derived. An agreement reached with the Navajo Nation in 1985, however, provides that if Four Corners loses a portion of its rights in the adjudication, the Navajo Nation will provide, for an agreed upon cost, sufficient water from its allocation to offset the loss. In addition, APS is a party to a water contract that allows the companyCompany to secure water for Four Corners in the event of a water shortage
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and is a party to a shortage sharing agreement, which provides for the apportionment of water supplies to Four Corners in the event of a water shortage in the San Juan River Basin.

Gila River Adjudication. A summons served on APS in early 1986 required all water claimants in the Lower Gila River Watershed in Arizona to assert any claims to water on or before January 20, 1987, in an action pending in Arizona Superior Court. Palo Verde is located within the geographic area subject to the summons. APS’s rights and the rights of the other Palo Verde participants to the use of groundwater and effluent at Palo Verde are potentially at issue in this adjudication. As operating agent of Palo Verde, APS filed claims that dispute the court’s jurisdiction over the Palo Verde participants’ groundwater rights and their contractual rights to effluent relating to Palo Verde. Alternatively, APS seeks confirmation of such rights. Several of APS’s other power plants are also located within the geographic area subject to the summons, including a number of gas-fired power plants located within Maricopa and Pinal Counties. In November 1999, the Arizona Supreme Court issued a decision confirming that certain groundwater rights may be available to the federal government and Indian tribes. In addition, in September 2000, the Arizona Supreme Court issued a decision affirming the lower court’s criteria for resolving groundwater claims. Litigation on both of these issues has continued in the trial court. In December 2005, APS and other parties filed a petition with the Arizona Supreme Court requesting interlocutory review of a September 2005 trial court order regarding procedures for determining whether groundwater pumping is affecting surface water rights. The Arizona Supreme Court denied the petition in May 2007, and the trial court is now proceeding with implementation of its 2005 order. No trial date concerning APS’s water rights claims has been set in this matter.

At this time, the lower court proceedings in the Gila River adjudication are in the process of determining the specific hydro-geologic testing protocols for determining which groundwater wells located outside of the subflow zone of the Gila River should be subject to the adjudication court’s jurisdiction. A hearing to determine this jurisdictional test question was held in March of 2018 in front of a special master, and a draft decision based on the evidence heard during that hearing was issued on May 17, 2018. The decision of the special master, which was finalized on November 14, 2018, but which is subject to further review by the trial court judge, accepts the proposed hydro-geologic testing protocols supported by APS and other industrial users of groundwater. A finalfurther ruling affirming this decision by the trial court judge in this matter remains pending.overseeing the adjudication was issued on July 8, 2022. Further proceedings have been initiated to determine the specific hydro-geologic testing protocols for subflow depletion determinations. The determinations made in this final stage of the proceedings may ultimately govern the adjudication of rights for parties, such as APS, that rely on groundwater extraction to support their industrial operations. APS cannot predict the outcome of these proceedings.

Little Colorado River Adjudication. APS has filed claims to water in the Little Colorado River Watershed in Arizona in an action pending in the Apache County, Arizona, Superior Court, which was originally filed on September 5, 1985. APS’s groundwater resource utilized at Cholla is within the geographic area subject to the adjudication and, therefore, is potentially at issue in the case. APS’s claims dispute the court’s jurisdiction over its groundwater rights. Alternatively, APS seeks confirmation of such rights. Other claimsNo trial or pretrial proceedings have been identified as ready for litigation in motions filed with the court. A trial is scheduled for Juneadjudication of 2020 regarding the contestedAPS’s water right claims. The adjudication court is currently conducting a trial of federal reserved water right claims ofasserted by the Hopi tribeTribe and by the United States as trustee for federal reserve water rights.  Similar claims of the

Navajo Nation are pending, but Tribe. In addition, the adjudication court has established a schedule for discoveryconsideration of separate federal reserved water right claims asserted by the Navajo Nation and resolutionby the United States as trustee for the Nation. There is no established timeframe within which the adjudication court is expected to issue a final determination of the tribe’s federal reserve water rights has not been established.for the Hopi Tribe and the Navajo Nation, and any such final determination is likely to occur multiple years in the future.

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Although the above matters remain subject to further evaluation, APS does not expect that the described litigation will have a material adverse impact on its financial position, results of operations, or cash flows.

Human Capital

The Company seeks to attract the best employees, retain those employees, and create a safe, inclusive, and productive work environment for all employees. We believe the strength of our employees is one of the significant contributors to our Company’s success. Human capital measures and objectives that the Company focuses on in retaining its talent and managing its business include the safety of our employees, career development, diversity, equity and inclusion, succession planning, hiring, voluntary turnover, compensation, benefits, employee experience, and engagement.

Employee Safety

Our work and our decisions are anchored in safety – safety is the foundation of everything we do, and employee safety is our paramount responsibility as an employer. We develop safety practices and programs that ensure employees have safe and secure workplaces that allow them to perform at the highest levels. Our comprehensive safety programs and our focus on human and organizational performance and injury case management contribute significantly to our strong safety performance.As we continue to improve our safety performance, our ultimate goal remains serious injury reduction. Our employees are expected to do the right thing and are empowered to speak up when there are better or safer ways of doing business, including stopping work to reassess or improve safety.Safety committees operate in organizations throughout the Company, providing opportunities for employees to positively impact their local safety cultures and performance.

Diversity, Equity, and Inclusion

We believe that belonging matters. When we feel seen, heard, and valued, we can more effectively unite behind the APS Promise. Inclusion at the Company involves taking deliberate action to embrace the unique perspectives of each employee. We recognize that diversity of demographics, backgrounds and cultural perspective is a key driver for our success.Our internal diversity, equity, and inclusion team, supported by our Executive Diversity & Inclusion Council as well as other groups, leads this commitment with an emphasis on diversity among employees, in the workplace, and through our community involvement, as well as an increased focus on attracting and retaining diverse talent. This focus extends to individual business units in the Company, which report on the diversity of their teams during management review meetings to build awareness and address gaps of workforce diversity.

Our efforts to support and empower employees include a commitment to full inclusion of all our people. We have a robust, multi-year strategy for diversity, equity, and inclusion that focuses on eleven key areas, both internally- and externally-facing. In 2021, APS received recognition as winner of the Inclusive Workplace Award from Diversity Leadership Alliance and Arizona Society of Human Resource Management. The award recognizes APS as an Arizona corporation that leads by example, creating an inclusive environment in which employees can be their genuine, authentic selves, and partners on community outreach efforts and support.

Each year since 2020, we have conducted company-wide executive listening sessions to provide employees with opportunities to be heard on their experiences at the Company. In 2019, we signed the UNITY Pledge in support of full inclusion and equality in employment, housing, and public
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accommodations for all Arizonans, including gay and transgender people. The UNITY Pledge reinforces our commitment to fostering an environment that recognizes our employees’ unique needs and celebrates the value of diverse perspectives. The Company sponsors ten employee network groups that are intended to create a sense of inclusion and belonging for employees.

We continue to focus on hiring diverse employees as well as hiring employees from our veteran community. During 2022, 44% of external hires were ethnically or racially diverse, 40% were female and 7% were veterans.Additionally, as of December 31, 2022, 35% of our employees are ethnically or racially diverse, 26% are female, and 15% are veterans. Finally, as of December 31, 2022, 39% of the Company’s officers are female, and 18% are ethnically or racially diverse.

Succession Planning

Through a strong focus on succession planning, we ensure that our Company is prepared to fill executive and other key leadership roles with capable, experienced employees. We continually revisit and revise succession plans to make certain that qualified individuals are in place to move into critical positions. We have strategically selected successors for our management team to lead our Company into the future with strong and sustainable performance. In addition, we assure that each business unit of the Company has talent management strategies and development plans to meet its future leadership needs. Effective succession planning helps us identify employees with leadership potential and also allows us to evaluate any gaps in education, skills and experience that need to be addressed to prepare those employees to move into leadership roles. At management review meetings, officers and directors review how business units are addressing succession planning, leadership opportunities, and retirement projections.

Talent Strategy and Development

We place significant focus on attracting and developing a skilled workforce. To attract and retain top talent, we provide formal professional development programs through blended learning education and leadership training.Our employees have access to a wide variety of training and development opportunities, including leadership academies, rotational programs, mentoring programs, industry certifications, and loaned executive programs. In 2022, we graduated 138 individuals from our three academies (Leadership Academy, Impact and Influence Academy, and Strategic Leadership Academy).Additionally, our Learning and Development organization was recognized as a top training organization, earnings an APEX Award from Training Magazine.

Talent pipelines help sustain our skilled workforce needs. Pipeline strategies include our apprentice and rotational programs. Additionally, our recruiters target specific colleges and programs of study that we have identified as talent pipelines. In 2022, we hosted 54summer interns with a diversity rate of 63%.

Total Rewards Strategy

In addition to our talent strategy, we place significant focus on our Total Rewards strategy for attracting, developing, and rewarding our highly skilled workforce. Our employees are important to the success and future of our organization and our customers’ experiences. At the Company, our pay and benefits, along with retirement, recognition, time off, career development and well-being, make up our Total Rewards program. It is an important part of the employee experience at the Company and supports
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personal well-being and professional satisfaction. We are committed to providing programs that matter to our employees throughout various life and career phases.

Employee Engagement

An annual employee experience survey and focused quarterly pulse-surveys, enable us to gather employee feedback, identify opportunities for improvement, and compare our performance to other companies.Through the surveys, we track our Employee Experience Index, a set of seven questions that encompass key elements of a positive employee experience, including recognition, career development possibilities, and pride in the organization.Based on survey results, business units and individual managers are encouraged to take meaningful actions to improve the employee experience. In response to past surveys, we have launched enterprise-wide initiatives focused on improving communication between employees and management as well as removing obstacles that prevent job success. Other initiatives driven by the survey have given employees more access to leadership and improved meeting efficiency. Our cross-functional Employee Engagement Council focuses on improving employee recognition across the organization.We work to ensure that a positive work environment is maintained for all employees. Through an outreach initiative, we obtain feedback from new hires regarding their employee experience. In 2019, we integrated our employee experience surveys with onboarding surveys and exit interviews. Bringing together these elements allows us to get a more complete picture of the experience of our employees, from the time they join the Company until they decide to leave.

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Company Culture

In 2020, the Company launched the APS Promise, anchoring our commitment to our customers, community, and each other. The Promise explains our purpose, vision, and mission and the principles and behaviors that will empower us to achieve our strategic goals. It represents the opportunity to build on our cultural strengths and develop new behaviors to enable our future success.

pnw-20221231_g3.jpg

BUSINESS OF OTHER SUBSIDIARIES

Bright Canyon Energy

On July 31, 2014, Pinnacle West announced its creation of a wholly-owned subsidiary, BCE.  BCE's focusBCE’s strategy is on new growth opportunitiesto develop, own, operate and acquire energy infrastructure in a manner that leverageleverages the Company’s core expertise in the electric energy industry.  BCE’s first initiative isAs of December 31, 2022, BCE had total assets of approximately $115.3 million.

In 2014, BCE formed a 50/50 joint venture with BHE U.S. Transmission LLC, a subsidiary of Berkshire Hathaway Energy Company.  The joint venture, named TransCanyon, is pursuing independent electric transmission opportunities within the eleven11 U.S. states that comprise the Western Electricity Coordinating Council,Interconnection, excluding opportunities related to transmission service that would otherwise be provided under the tariffs of the retail service territories of the venture partners’ utility affiliates.  As

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Table of December 31, 2019, BCE had total assets of approximately $14 million.Contents
On December 20, 2019, BCE acquired minority ownership positions in two wind farms developedunder development by Tenaska Energy, Inc. and Tenaska Energy Holdings, LLC, (collectively, "Tenaska"), the 242 MW Clear Creek wind farm in Missouri (“Clear Creek”) and the 250 MW Nobles 2 wind farm in Minnesota. TheMinnesota (“Nobles 2”). Clear Creek achieved commercial operation in May 2020 and Nobles 2 achieved commercial operation in December 2020. Both wind farms deliver power under long-term PPAs. BCE indirectly owns 9.9% of Clear Creek and 5.1% of Nobles 2.

Tenaska Clear Creek Wind, LLC, the developer, owner, and operator of the Clear Creek wind farm, has disputed the proposed cost allocation of system upgrades related to connecting the Clear Creek wind farm to the transmission system and filed a complaint with FERC on May 21, 2021, which was denied on September 9, 2022. Subsequently, Tenaska Clear Creek Wind, LLC filed with FERC a request for rehearing and a motion for stay of the September 9, 2022 order. On October 7, 2022, the request for rehearing was denied by FERC. FERC has not ruled on the motion for stay. Clear Creek has filed a Petition for Review with the U.S. Court of Appeals and Motion for Stay Pending Appeal, both of which are still pending.

Tenaska Clear Creek Wind, LLC filed a second complaint with FERC on May 25, 2022, alleging that the wind farm was being curtailed in a discriminatory manner. The May 25, 2022 Complaint was denied by FERC on December 15, 2022 and Tenaska Clear Creek Wind, LLC requested Rehearing of the denial on January 13, 2023.

Due to the disputed system upgrades and the related curtailment, the Clear Creek wind farm has experienced a significant reduction in power generation that has had a material adverse impact on the project’s ability to generate cash flow for investors. These energy curtailments are expected to persist, unless and until system upgrades are implemented to alleviate the present transmission system congestion, or the disputes are determined in favor of, or settled in a manner favorable to, Tenaska Clear Creek Wind, LLC. As such, during the fourth quarter of 2022, due to these on-going disputes, cost allocation uncertainties, and no probable favorable resolution, BCE determined its equity method investment was fully impaired. Prior to the impairment, the investment had a carrying value of $17.1 million, which has been written-down to reflect the investments estimated fair value of zero as of December 31, 2022. Pinnacle Wests Consolidated Statement of Income for the year ended December 31, 2022 includes an after-tax loss of $12.8 million relating to this impairment.

BCE has started construction on a microgrid facility in Los Alamitos, California (“Los Alamitos”) featuring 31 MW of solar, 20 MW of battery storage, and 3 MW of backup generators. Supported by a long-term PPA with San Diego Gas and Electric Company, Los Alamitos will supply 20 MW of solar and battery storage capacity to the Southern California grid and provide resilient backup power in the event of a grid emergency to the Army and California National Guard at Joint Forces Training Base Los Alamitos. The Los Alamitos project is expectedscheduled to achieve commercial operation in 2020third-quarter 2023. See Note 6 regarding a credit agreement entered into by BCE to finance capital expenditures and deliver powerrelated costs for this microgrid project.

BCE and Ameresco, Inc. jointly own a special purpose entity that is sponsoring the Kūpono Solar project. This project is a 42 MW solar and battery storage facility in Oʻahu, Hawaii that will supply clean renewable energy and capacity under a long-term power purchase agreement.20-year PPA with Hawaiian Electric Company, Inc. The Nobles 2Kūpono Solar project is also expected to achieve commercial operationbe completed in 2020 and deliver power under a long-term power purchase agreement. BCE indirectly owns 9.9%2024.

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El Dorado
 
El Dorado is a wholly-owned subsidiary of Pinnacle West. El Dorado owns debt investments and minority interests in several energy-related investments and Arizona community-based ventures.  El Dorado’s short-term goalDorado is actively seeking to prudently realize the value of its existingthese investments.  As of December 31, 2019, El Dorado had total assets of approximately $9 million.In particular, El Dorado committed to a $25 million investment in the Energy Impact Partners fund, which is an organization that focuses on fostering innovation and supporting the transformation of the utility industry. The investment will be made by El Dorado as investments are selected by the Energy Impact Partners fund.

4CA
4CA is a wholly-owned subsidiary of Pinnacle West. As of December 31, 2019, 4CA had total assets of2022, El Dorado has contributed approximately $55$12.5 million to the Energy Impact Partners fund. Additionally, El Dorado committed to a $25 million investment in AZ-VC (formerly invisionAZ Fund), which is a fund focused on analyzing, investing, managing, and otherwise dealing with investments in privately-held early stage and emerging growth technology companies and businesses primarily consisting of a note receivable from NTEC.  See "Businessbased in the State of Arizona, Public Service Company - Energy Sourcesor based in other jurisdictions and Resource Planning - Generating Facilities - Coal-Fueled Generating Facilities - Four Corners" above for information regarding 4CA andhaving existing or potential strategic or economic ties to companies or other interests in the note receivable from NTEC.

OTHER INFORMATION
Subpoenas

Pinnacle West previously received grand jury subpoenas issued in connection with an investigationState of Arizona. As of December 31, 2022, El Dorado has contributed approximately $2.6 million to the AZ-VC. The remainder of the investments will be contributed by El Dorado as investments are selected by the office of the United States Attorney for the District of Arizona. The subpoenas sought information principally pertaining to the 2014 statewide election races in Arizona for Secretary of State and for positions on the ACC. The subpoenas requested records involving certain Pinnacle West officers and employees, including the Company’s former Chief Executive Officer, as well as communications between Pinnacle West personnel and a former ACC Commissioner. Pinnacle West understands the matter is closed.AZ-VC.

Other Information

Pinnacle West, APS and El Dorado are all incorporated in the State of Arizona.  BCE and 4CA are incorporated in Delaware. Additional information for each of these companies is provided below:
 
Principal Executive Office
Address
 
Year of
Incorporation
 
Approximate
Number of
Employees at
December 31, 2019
Principal Executive Office
Address
Year of
Incorporation
Approximate
Number of
Employees at
December 31, 2022
Pinnacle West 
400 North Fifth Street
Phoenix, AZ 85004
 1985 97
Pinnacle West400 North Fifth Street
Phoenix, AZ 85004
198582 
APS 
400 North Fifth Street
P.O. Box 53999
Phoenix, AZ 85072-3999
 1920 6,111
APS400 North Fifth Street
P.O. Box 53999
Phoenix, AZ 85072-3999
19205,772 
BCE 
400 East Van Buren
Phoenix, AZ 85004
 2014 2
BCE400 East Van Buren Street
Phoenix, AZ 85004
2014
El Dorado 
400 East Van Buren
Phoenix, AZ 85004
 1983 
El Dorado400 East Van Buren Street
Phoenix, AZ 85004
1983— 
4CA 
400 North Fifth Street
Phoenix, AZ 85004
 2016 
4CA400 East Van Buren Street
Phoenix, AZ 85004
2016— 
Total     6,210
Total  5,861 
 
The APS number includes employees at jointly-owned generating facilities (approximately 2,4572,059 employees) for which APS serves as the generating facility manager.  Approximately 1,3291,162 APS employees are union employees, represented by the International Brotherhood of Electrical Workers ("IBEW"(“IBEW”). In January 2018,March 2020, the Company concluded negotiations with the IBEW and approved a two-yearthree-year extension of the contract set to expire on April 1, 2018.2020.  Under the extension, union members received wage increases for 20182020, 2021 and 2019;2022; there were no other changes. The current contract expires on April 1, 2020. In preparation for that expiration, the Company began negotiations with2023, and APS and the IBEW are currently engaged in October 2019 and negotiations are ongoing.to renew the contract.

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WHERE TO FIND MORE INFORMATION

We use our website (www.pinnaclewest.com)www.pinnaclewest.com) as a channel of distribution for material Company information.  The following filings are available free of charge on our website as soon as reasonably practicable after they are electronically filed with, or furnished to, the Securities and Exchange Commission (“SEC”):  Annual Reports on Form 10-K, definitive proxy statements for our annual shareholder meetings, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and all amendments to those reports. The SEC maintains a website that contains reports, proxy and information statements and other information regarding issuers, such as the Company, that file electronically with the SEC. The address of that website is www.sec.gov. Our board and committee charters, Code of Ethics for Financial Executives, Code of Ethics and Business Practices, and other corporate governance information is also available on the Pinnacle West website.  Pinnacle West will post any amendments to the Code of Ethics for Financial Executives and Code of Ethics

and Business Practices, and any waivers that are required to be disclosed by the rules of either the SEC or the New York Stock Exchange on its website.  The information on Pinnacle West’s website is not incorporated by reference into this report.
 
You can request a copy of these documents, excluding exhibits, by contacting Pinnacle West at the following address:  Pinnacle West Capital Corporation, Office of the Corporate Secretary, Mail Station 8602, P.O. Box 53999, Phoenix, Arizona 85072-3999 (telephone 602-250-4400)602-250-3011).

ITEM 1A.  RISK FACTORS
In addition to the factors affecting specific business operations identified in the description of these operations contained elsewhere in this report, set forth below are risks and uncertainties that could affect our financial results.  Unless otherwise indicated or the context otherwise requires, the following risks and uncertainties apply to Pinnacle West and its subsidiaries, including APS.

REGULATORY RISKS
Our financial condition depends upon APS’s ability to recover costs in a timely manner from customers through regulated rates and otherwise execute its business strategy.
APS is subject to comprehensive regulation by several federal, state and local regulatory agencies that significantly influence its business, liquidity and results of operations and its ability to fully recover costs from utility customers in a timely manner.  The ACC regulates APS’s retail electric rates and FERC regulates rates for wholesale power sales and transmission services.  The profitability of APS is affected by the rates it may charge and the timeliness of recovering costs incurred through its rates.rates and adjustor recovery mechanisms. Consequently, our financial condition and results of operations are dependent upon the satisfactory resolution of any APS rate proceedings, adjustor recovery and ancillary matters which may come before the ACC and FERC, including in some cases how court challenges to these regulatory decisions are resolved. Arizona, like certain other states, has a statute that allows the ACC to reopen prior decisions and modify otherwise final orders under certain circumstances. Additionally, given that APS is subject to oversight by several regulatory agencies, a resolution by one may not foreclose potential actions by others for similar or related matters. See Note 10.

The ACC must also approve APS’s issuance of equity and debt securities and any significant transfer or encumbrance of APS property used to provide retail electric service and must approve or receive prior notification of certain transactions between us, APS, and our respective affiliates, including the infusion of equity into APS.  Decisions made by the ACC or FERC could have a material adverse impact on our financial condition, results of operations, or cash flows.
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APS’s ability to conduct its business operations and avoid finesnegative operational and penaltiesfinancial impacts depends in part upon compliance with federal, state and local laws, judicial decisions, statutes, regulations and ACC requirements, which may be revised from time to time by legislative or other action, and obtaining and maintaining certain regulatory permits, approvals, and certificates.
APS must comply in good faith with all applicable statutes, regulations, rules, tariffs, and orders of agencies that regulate APS’s business, including FERC, NRC, EPA, the ACC, and state and local governmental agencies.  These agencies regulate many aspects of APS’s utility operations, including safety and performance, emissions, siting and construction of facilities, customer service and the rates that APS can charge retail and wholesale customers.  Failure to comply can subject APS to, among other things, fines and penalties.  For example, under the Energy Policy Act of 2005, FERC can impose penalties (approximately $1.2 million dollars per day per violation) for failure to comply with mandatory electric reliability standards.  APS is also required to have numerous permits, approvals and certificates from these agencies.  APS believes the necessary permits, approvals and certificates have been obtained for its existing operations and that APS’s business is conducted in accordance with applicable laws in all material respects. However, changes
Changes in laws or regulations that govern APS, new interpretations of law and regulations, or the imposition

of new or revised laws or regulations could have an adverse impact on the manner in which we operate our business and our results of operations. In particular, new or revised laws or interpretations of existing laws or regulations may impact or call into question the ACC’s permissive regulatory authority, which may result in uncertainty as to jurisdictional authority within our state, and uncertainty as to whether ACC decisions will be binding or challenged by other agencies or bodies asserting jurisdiction. In November 2021, the Arizona Court of Appeals issued an opinion that called into question the ACC-approved limitation of liability provision found in the APS Service Schedules. APS sought review of the decision at the Arizona Supreme Court, which was denied; however, the Supreme Court depublished portions of the Court of Appeals’ decision. APS is seeking revised tariff language to mitigate potential adverse impacts on APS’s future, potential litigation exposure which may result from this court decision. We are also unable to predict the impact on our business and operating results from any pending or future regulatory activities of any of these agencies.

or legislative rulemaking.
The operation of APS’s nuclear power plant exposes it to substantial regulatory oversight and potentially significant liabilities and capital expenditures.
The NRC has broad authority under federal law to impose safety-related, security-related and other licensing requirements for the operation of nuclear generating facilities.  Events at nuclear facilities of other operators or impacting the industry generally may lead the NRC to impose additional requirements and regulations on all nuclear generating facilities, including Palo Verde.  In the event of noncompliance with its requirements, the NRC has the authority to impose a progressively increased inspection regime that could ultimately result in the shut-down of a unit or civil penalties, or both, depending upon the NRC’s assessment of the severity of the situation, until compliance is achieved.  The increased costs resulting from penalties, a heightened level of scrutiny and implementation of plans to achieve compliance with NRC requirements may adversely affect APS’s financial condition, results of operations and cash flows.

APS is subject to numerous environmental laws and regulations, and changes in, or liabilities under, existing or new laws or regulations may increase APS’s cost of operations or impact its business plans.
APS is, or may become, subject to numerous environmental laws and regulations affecting many aspects of its present and future operations, including air emissions of conventional pollutants and greenhouse gases,GHGs, water quality, discharges of wastewater and waste streams originating from fly ash and bottom ash handling facilities, solid waste, hazardous waste, and coal combustion products, which consist of bottom ash, fly ash, and air pollution control wastes.  These laws and regulations can result in increased capital,
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operating, and other costs, particularly with regard to enforcement efforts focused on power plant emissions obligations.  These laws and regulations generally require APS to obtain and comply with a wide variety of environmental licenses, permits, and other approvals.  If there is a delay or failure to obtain any required environmental regulatory approval, or if APS fails to obtain, maintain, or comply with any such approval, operations at affected facilities could be suspended or subject to additional expenses.  In addition, failure to comply with applicable environmental laws and regulations could result in civil liability as a result of government enforcement actions or private claims or criminal penalties.  Both public officials and private individuals may seek to enforce applicable environmental laws and regulations.  APS cannot predict the outcome (financial or operational) of any related litigation that may arise.
Environmental Clean Up. APS has been named as a PRP for a Superfund site in Phoenix, Arizona, and it could be named a PRP in the future for other environmental clean-up at sites identified by a regulatory body. APS cannot predict with certainty the amount and timing of all future expenditures related to environmental matters because of the difficulty of estimating clean-up costs.  There is also uncertainty in quantifying liabilities under environmental laws that impose joint and several liability on all PRPs.

Coal Ash. In December 2014, EPA issued final regulations governing the handling and disposal of CCR, which are generated as a result of burning coal and consist of, among other things, fly ash and bottom ash. The rule regulates CCR as a non-hazardous waste. APS currently disposes of CCR in ash ponds and dry storage areas at Cholla and Four Corners and in a dry landfill storage area at the Navajo Plant.Corners. To the extent the rule requires the closure or modification of these CCR units, modification or changes to the manner of closure of such units, or the construction of new CCR units beyond what we currently anticipate, APS would incur significant additional costs for CCR disposal. In addition, the rule may also require corrective action to address releases from CCR disposal units or the presence of CCR constituents within groundwater near CCR disposal units above certain regulatory thresholds.


Ozone National Ambient Air Quality Standards. In 2015, EPA finalized revisions to the national ambient air quality standardsNAAQS for nitrogen oxides,ozone, which set new, more stringent standards intendedon emissions of nitrogen oxide, a precursor to ozone, in an effort to protect human health and human welfare. Depending on the final attainment designations for the new standards and the state implementation requirements, APS may be required to invest in new pollution control technologies and to generate emission offsets for new projects or facility expansions located in ozone nonattainment areas.

APS cannot assure that existing environmental regulations will not be revised or that new regulations seeking to protect the environment will not be adopted or become applicable to it.  Revised or additional regulations that result in increased compliance costs or additional operating restrictions, particularly if those costs incurred by APS are not fully recoverable from APS’s customers, could have a material adverse effect on its financial condition, results of operations, or cash flows.  Due to current or potential future regulations or legislation coupled with trends in natural gas and coal prices, or other clean energy rules or initiatives, the economics or feasibility of continuing to own certain resources, particularly coal facilities, may deteriorate, warranting early retirement of those plants, which may result in asset impairments.  APS would seek recovery in rates for the book value of any remaining investments in the plants as well as other costs related to early retirement but cannot predict whether it would obtain such recovery.
APS faces potential financial risks resulting from climate change litigation and legislative and regulatory efforts to limit GHG emissions, as well as physical and operational risks related to climate effects.

Concern over climate change has led to significant legislative and regulatory efforts to limit CO2, which is a major byproduct of the combustion of fossil fuel, and other GHG emissions.
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Potential Financial Risks - Greenhouse Gas Regulation, the Clean Power Plan and Potential Litigation. In 2015, EPA finalized a rule to limit carbon dioxideCO2 emissions from existing power plants, the Clean Power Plan, or CPP. The implementation of this rule within the jurisdictions where APS operates could resultwould have resulted in a shift in in-state generation from coal to more natural gas and renewable generation. SuchBecause of a substantial change in APS’sview that the federal Clean Air Act did not permit such an expansive use of administrative authority over utility generation portfolio could require additional capital investments and increased operating costs, and thus have a significant financial impact on the Company. EPA took action in October 2017 to repeal these regulations and in July 2019, EPA published final regulations, the ACE Rule, to replace the CPP with a new set of regulations. EPA’s actionresources, in 2019 to repealregulations were issued that repealed the CPP and replacereplaced it with the ACEa far narrower set of regulations is currently subject to pending judicial review infocused solely on coal-fired power plant efficiency improvements. On January 19, 2021, the U.S. Court of Appeals for the DistrictD.C. Circuit vacated the ACE regulations and remanded them back to EPA to develop new regulations governing carbon emissions from existing power plants consistent with the court’s ruling. That decision, which endorsed an expansive view of Columbia.the federal Clean Air Act consistent with the CPP, was subsequently reversed by the U.S. Supreme Court on June 30, 2022. While the current administration has expressed its intent to develop new carbon emission regulations governing existing power plants in 2023, such action will be constrained by the U.S. Supreme Court’s decision that the CPP violated the Clean Air Act.
Depending on the final outcome of a pendingfuture carbon emission rulemakings under the Clean Air Act targeting new and existing power plants, the utility industry may become subject to more stringent and expansive regulations. Depending on the means of compliance with federal emission performance standards, the electric utility industry may be forced to incur substantial costs necessary to achieve compliance. In addition, we anticipate that such regulations will be challenged in federal court prior to their implementation. Depending on the outcome of such judicial review, of ACE and repeal of the CPP, along with related regulatory activity to implement the ACE regulations, the utility industry may face alternative efforts from private parties seeking to establish alternative GHG emission limitations from power plants. Alternative GHG emission limitations may arise from litigation under either federal or state common laws or citizen suit provisions of federal environmental statutes that attempt to force federal agency rulemaking or imposing direct facility emission limitations. Such lawsuits may also seek damages from harm alleged to have resulted from power plant GHG emissions.
Physical and Operational Risks. Weather extremes such as drought and high temperature variations are common occurrences in the southwest United States'States’ desert area, and these are risks that APS considers in the normal course of business in the engineering and construction of its electric system. Large increases in ambient temperatures could require evaluation of certain materials used within its system and may represent a greater challenge. Limitations on water supplies necessary to operate electric generation infrastructure could arise from prolonged drought and shortage declarations associated with key surface water resources. As part of conducting its business, APS recognizes that the southwestern United States is particularly susceptible to the risks posed by climate change, which over time is projected to exacerbate high temperature extremes and prolong drought in the area where APS conducts its business.

Co-owners of our jointly owned generation and transmission facilities may have unaligned goals and positions due to the effects of legislation, regulations, economic conditions, or changes in our industry, which could have a significant impact on our ability to continue operations of such facilities.

APS owns certain of ourits power plants and transmission facilities jointly with other owners, with varying ownership interests in such facilities. Changes in the nature of our industry and the economic viability of certain plants and facilities, including impacts resulting from types and availability of other resources, fuel costs, legislation, and regulation, together with timing considerations related to expiration of leases or other agreements for such facilities, could result in unaligned positions among co-owners. Such differencesDifferences in the co-owners’ willingness or ability to continue their participation could ultimately lead to disagreements among the parties as to how and whether to continue operation of such plants, which could lead to eventual shut down of units or facilities and uncertainty related to the resulting cost recovery of such assets. See Note 43 for a discussion of the Navajo Plant and Cholla retirement and the related risks associated with APS'sAPS’s continued recovery of its remaining investment in the plant.

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Deregulation or restructuring of the electric industry may result in increased competition, which could have a significant adverse impact on APS’s business and its results of operations.
In 1999, the ACC approved rules for the introduction of retail electric competition in Arizona.  Retail competition could have a significant adverse financial impact on APS due to an impairment of assets, a loss of retail customers, lower profit margins or increased costs of capital.  Although some very limited retail competition existed in APS’s service area in 1999 and 2000, there are currently no active retail competitors offering unbundled energy or other utility services to APS’s customers.  This is in large part due to a 2004 Arizona Court of Appeals decision that found critical components of the ACC'sACC’s rules to be violative of the Arizona Constitution. The ruling also voided the operating authority of all the competitive providers previously authorized by the ACC. On May 9, 2013, the ACC voted to re-examine the facilitation of a deregulated retail electric market in Arizona.  The ACC subsequently opened a docket for this matter and received comments from a number of interested parties on the considerations involved in establishing retail electric deregulation in the state.  One of these considerations is whether various aspects of a deregulated market, including setting utility rates on a “market” basis, would be consistent with the requirements of the Arizona Constitution.  On September 11, 2013, after receiving legal advice from the ACC staff, the ACC voted 4-1 to close the current docket and await full Arizona Constitutional authority before any further examination of this matter. The motion approved by the ACC also included opening one or more new dockets in the future to explore options to offer more rate choices to customers and innovative changes within the existing cost-of-service regulatory model that could include elements of competition. 

One of these options would be a continuation or expansion of APS’s existing AG (Alternative Generation)-X program, which essentially allows up to 200 MW of cumulative load to be served via a buy-through arrangement with competitive suppliers of generation.  The AG-X program was approved by the ACC as part of the 2017 Settlement Agreement.
In November 2018, the ACC voted to again re-examine retail competition. In addition, proposals to enable or supportthe facilitation of a deregulated retail electric competition may be made from time to time through ballot initiatives, legislative action or other forumsmarket in Arizona. TheOn July 1 and July 2, 2019, ACC has scheduledStaff issued a workshop for February 25-26, 2020 for further considerationreport and discussion ofinitial proposed draft rules regarding possible modifications to the ACC’s retail electric competition rules. APS cannot predict whether these efforts will result in any changes and, if changesOn February 10, 2020, two ACC Commissioners filed two sets of draft proposed retail electric competition rules. On February 12, 2020, ACC Staff issued its second report regarding possible modifications to the rules results, what impact these rules would have on APS.


ProposalsACC’s retail electric competition rules. During a July 15, 2020, ACC Staff meeting, the ACC Commissioners discussed the possible development of a retail competition pilot program, but no action was taken. The ACC continues to change policydiscuss matters related to retail electric competition, including the potential for additional buy-through programs or other pilot programs. In April 2022, the Arizona Legislature passed and the Governor signed a bill that repealed the electric deregulation law that had been in place in Arizona or other states made through ballot initiatives or referenda may increase the Company’s cost of operations or impact its business plans.since 1998.

In Arizona and other states, a person or organization may file a ballot initiative or referendum with the Arizona Secretary of State or other applicable state agency and, if a sufficient number of verifiable signatures are presented, the initiative or referendum may be placed on the ballot for the public to vote on the matter. Ballot initiatives and referenda may relate to any matter, including policy and regulation related to the electric industry, and may change statutes or the state constitution in ways that could impact Arizona utility customers, the Arizona economy and the Company. Some ballot initiatives and referenda are drafted in an unclear manner and their potential industry and economic impact can be subject to varied and conflicting interpretations. We may oppose certain initiatives or referenda (including those that could result in negative impacts to our customers, the state or the Company) via the electoral process, litigation, traditional legislative mechanisms, agency rulemaking or otherwise, which could result in significant costs to the Company. The passage of certain initiatives or referenda could result in laws and regulations that impact our business plans and have a material adverse impact on our financial condition, results of operations or cash flows.

OPERATIONAL RISKS
APS’s results of operations can be adversely affected by various factors impacting demand for electricity.
Weather Conditions.  Weather conditions directly influence the demand for electricity and affect the price of energy commodities.  Electric power demand is generally a seasonal business.  In Arizona, demand for power peaks during the hot summer months, with market prices also peaking at that time.  As a result, APS’s overall operating results fluctuate substantially on a seasonal basis.  In addition, APS has historically sold less power, and consequently earned less income, when weather conditions are milder.  As a result, unusually mild weather could diminish APS’s financial condition, results of operations, or cash flows.

Apart from the impact upon electricity demand, weather conditions related to prolonged high temperatures or extreme heat events present operational challenges. In the southwestern United States, where APS conducts its business, the effects of climate change are projected to increase the overall average temperature, lead to more extreme temperature events, and exacerbate prolonged drought conditions leading to the declining availability of water resources. Extreme heat events and rising temperatures are projected to reduce the generation capacity of thermal-power plants and decrease the efficiency of the transmission grid. These operational risks related to rising temperatures and extreme heat events could affect APS’s financial condition, results of operations, or cash flows.

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Higher temperatures may decrease the snowpack, which might result in lowered soil moisture and an increased threat of forest fires.  Forest fires could threaten APS’s communities and electric transmission lines and facilities.  Any damage caused as a result of forest fires could negatively impact APS’s financial condition, results of operations, or cash flows. In addition, the decrease in snowpack can also lead to reduced water supplies in the areas where APS relies upon non-renewable water resources to supply cooling and process water for electricity generation. Prolonged and extreme drought conditions can also affect APS’s long-term ability to access the water resources necessary for thermal electricity generation operations. Reductions in the availability of water for power plant cooling could negatively impact APS’s financial condition, results of operations, or cash flows.
Effects of Energy Conservation Measures and Distributed Energy Resources.  The ACC has enacted rules regarding energy efficiency that mandate a 22% cumulative annual energy savings requirement by 2020.  This will likely increase participation by  APS customers in energy efficiency and conservation programs and other demand-side management efforts, which in turn will impact the demand for electricity.  The rules also

include a requirement for the ACC to review and address financial disincentives, recovery of fixed costs and the recovery of net lost revenue that would result from lower sales due to increased energy efficiency requirements.  To that end, the LFCR is designed to address these matters.
APS must also meet certain distributed renewable energy requirements.  A portion of APS’s total renewable energy requirement must be met with an increasing percentage of distributed renewable energy resources (generally, small scale renewable technologies located on customers’ properties).  The distributed renewable energy requirement is 30% of the applicable RES requirement for 2012 and subsequent years.years (this requirement has been waived by the ACC for 2023).  Customer participation in distributed renewable energy programs would result in lower demand since customers would be meeting some of their own energy needs.

In addition to these rules and requirements, energy efficiency technologies and distributed energy resources continue to evolve, which may have similar impacts on demand for electricity. Reduced demand due to these energy efficiency requirements, distributed energy requirements and other emerging technologies, unless substantially offset through ratemaking mechanisms, could have a material adverse impact on APS’s financial condition, results of operations and cash flows.
Actual and Projected Customer and Sales Growth. Retail customers in APS'sAPS’s service territory increased 2.0%2.1% for the year ended December 31, 20192022, compared with the prior year.prior-year period. For the three years 2017 through 2019,2022, APS’s retail customer growth averaged 1.8%2.2% per year. We currently project annual customer growth to be 1.5 -1.5% to 2.5% for 20202023 and for 2020the average annual growth to be in the range of 1.5% to 2.5% through 20222025 based on our assessment of improving economic conditionsanticipated steady population growth in Arizona. Arizona during that period.

Retail electricity sales in kWh, adjusted to exclude the effects of weather variations, increased 0.6%2.4% for the year ended December 31, 20192022, compared with the prior year.  Improving economic conditions andprior-year period. While steady customer growth werewas offset by energy savings driven by customer conservation, energy efficiency, and distributed renewable generation initiatives.  initiatives, the main drivers of positive sales for this period were a strong improvement in sales to commercial and industrial customers and the ramp-up of new data center customers.
For the three years 2017 through 2019,2022, annual retail electricity sales were about flat,growth averaged 2.5%, adjusted to exclude the effects of weather variations. WeDue to the expected rapid growth of several large data centers and new large manufacturing facilities, we currently project that annual retail electricity sales in kWh will increase in the range of 1.0 - 2.0%3.5% to 5.5% for 20202023 and increase onthat average annual growth will be in the range of 1.0 - 2.0% during 20204.5% to 6.5% through 2022,2025, including the effects of customer conservation, and energy efficiency, and distributed renewable generation initiatives, but excluding the effects of weather variations and excludingvariations. This projected sales growth range includes the impacts of several new large data centers opening operations in Metro Phoenix.  The impact ofand new large data centers could raisemanufacturing facilities, which are expected to contribute to average annual growth in the range of expected sales annual growth rate over the 20203.5% to 2022 period, but demand from these customers remains uncertain at this point. Slower than expected growth of the Arizona economy or acceleration of the expected effects of customer conservation, energy efficiency or distributed renewable generation initiatives could further impact these estimates.

5.5% through 2025.
Actual customer and sales growth, excluding weather-related variations, may differ from our projections as a result of numerous factors, such as economic conditions, customer growth, usage patterns and energy conservation, slower ramp-up of and/or fewer data centers and large manufacturing facilities, slower than expected commercial and industrial expansions, impacts of energy efficiency programs, and growth in distributed renewable generation, DG,
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and responses to retail price changes.  Additionally, recovery ofBased on past experience, a substantial portion of1% variation in our fixed costs of providing service is based upon the volumetric amount of our sales.  If our customer growth rate does not continue to improve as projected, or if we experience acceleration of expected effects of customer conservation, energy efficiency or distributed renewable generation initiatives, we may be unable to reach our estimatedannual residential and small commercial and industrial kWh sales projections which could haveunder normal business conditions can result in increases or decreases in annual net income of approximately $20 million, and a negative impact on1% variation in our financial condition, resultsannual large commercial and industrial kWh sales projections under normal business conditions can result in increases or decreases in annual net income of operations and cash flows.

approximately $5 million.
The operation of power generation facilities and transmission systems involves risks that could result in reduced output or unscheduled outages, which could materially affect APS’s results of operations.
The operation of power generation, transmission and distribution facilities involves certain risks, including the risk of breakdown or failure of equipment, fuel interruption, and performance below expected

levels of output or efficiency.  Unscheduled outages, including extensions of scheduled outages due to mechanical failures or other complications, occur from time to time and are an inherent risk of APS’s business.  Because our transmission facilities are interconnected with those of third parties, the operation of our facilities could be adversely affected by unexpected or uncontrollable events occurring on the larger transmission power grid, and the operation or failure of our facilities could adversely affect the operations of others.  Concerns over physical security of these assets could include damage to certain of our facilities due to vandalism or other deliberate acts that could lead to outages or other adverse effects. If APS’s facilities operate below expectations, especially during its peak seasons, it may lose revenue or incur additional expenses, including increased purchased power expenses. 
The impact of wildfires could negatively affect APS'sAPS’s results of operations.

Wildfires have the potential to affect the communities that APS serves and APS'sAPS’s vast network of electric transmission and distribution lines and facilities. The potential likelihood of wildfires has increased due to many of the same weather and climate change impacts existing in Arizona as those that led to the catastrophic wildfires in Northern California. While we proactively take steps to mitigate wildfire risk in the areas of our electrical assets, wildfire risk is always present due to APS'sAPS’s expansive service territory. APS could be held liable for damages incurred as a result of wildfires if it was determined that they were caused by or enhanced due to APS'sAPS’s negligence. The Arizona liability standard is different from that of California, which generally imposes liability for resulting damages without regard to fault. Any damage caused to our assets, loss of service to our customers, or liability imposed as a result of wildfires could negatively impact APS'sAPS’s financial condition, results of operations, or cash flows.

The inability to successfully develop, acquire or acquireoperate generation resources to meet future resource needs and load forecasts in accordance with reliability requirements and other new or evolving standards orand regulations could adversely impact our business.
Potential changes in regulatory standards, impacts of new and existing laws and regulations, including environmental laws and regulations, and the need to obtain various regulatory approvals create uncertainty surrounding our current and future generation portfolio. The current abundance of low, stably priced natural gas, together with environmentalregulatory standards, laws, and other concerns surrounding coal-fired generation resources,regulations create strategic challenges as to the appropriate generation portfolio and fuel diversification mix. In addition, APS is required by the ACC to meet certain energy resource portfolio requirements, including those related to renewables development and energy efficiency measures.measures, in addition to specific competitive resource procurement requirements. The development and operation of any generation facility is also subject to many risks, including those related to financing, siting, permitting, new and evolving technology, and the construction of sufficient transmission capacity to support these facilities. APS needs to develop or acquire new generation facilities, potentially modernize existing facilities, and/or contract for additional capacity in order to meet future resource needs and load forecasts. APS’s inability to adequately develop or acquire the necessary generation resourcesdo so could have a material adverse impact on our business and results of operations.

In expressing concerns about the environmental and climate-related impacts from continued extraction, transportation, delivery and combustion of fossil fuels, environmental advocacy groups and other third parties have in recent years undertaken greater efforts to oppose the permitting, construction,
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and constructionoperation of fossil fuel infrastructure projects. These efforts may increase in scope and frequency depending on a number of variables, including the future course of Federal environmental regulation and the increasing financial resources devoted to these opposition activities. APS cannot predict the effect that any such opposition may have on our ability to develop, construct, and constructoperate fossil fuel infrastructure projects in the future.

In January 2020, APS announced its goal to provide 100% clean, carbon-free electricity by 2050 with an intermediate 2030 target of achieving a resource mix that is 65% clean energy, with 45% of the generation portfolio coming from renewable energy. APS’s ability to successfully execute its clean energy commitment is dependent upon a number of external factors, some of which include supportive national and state energy policies, a supportive regulatory environment, sales and customer growth, the development, deployment and advancement of clean energy technologies, adequate supply chain for generation resources, and continued access to capital markets.
The lack of access to sufficient supplies of water could have a material adverse impact on APS’s business and results of operations.
Assured supplies of water are important for APS’s generating plants.  Water in the southwestern United States is limited, and various parties have made conflicting claims regarding the right to access and use such limited supply of water.  Both groundwater and surface water in areas important to the operation of APS’s generating plants have been and are the subject of inquiries, claims and legal proceedings.  In addition, the region in which APS’s power plants are located is prone tosuffer from prolonged drought conditions, which could potentially affect the plants’ water supplies.  Climate change is also projected to exacerbate prolongedsuch drought conditions. In addition, Colorado River water supplies for Arizona are subject to a Tier 2a shortage declaration, which substantially limits the quantity of water available for the state. APS’s inability to access sufficient supplies of water, along with that of its customers, could have a material adverse impact on our business and results of operations.

We are subject to cybersecurity risks and risks of unauthorized access to our systems that could adversely affect our business and financial condition.

We operate in a highly regulated industry that requires the continued operation of sophisticated information technology systems and network infrastructure. In the regular course of our business, we handle a range of sensitive security, customer, and business systems information. There appears to be an increasing level of activity, sophistication, and maturity of threat actors, in particularincluding from both nation state and non-nation state actors, that seek to exploit potential vulnerabilities in the electric utility industry and wish to disrupt the U.S. bulk power transmission and distribution system. Oursystem, our information technology systems, generation (including our Palo Verde nuclear facility), transmission and distribution facilities, and other infrastructure facilities and systems and physical assetsassets. We have been and could be targetsthe target of unauthorized accessattacks, and the aforementioned systems are critical areas of cyber protection for us.

We rely extensively on IT systems, networks, and services, including internet sites, data hosting and processing facilities, and other hardware, software and technical applications and platforms. Some of these systems are managed, hosted, provided, or used for third parties to assist in conducting our business. Malicious actors may attack vendors to disrupt the services these vendors provide to us or to use those vendors as a cyber conduit to attack us. As more third parties are involved in the operation of our business, there is a risk the confidentiality, integrity, privacy, or security of data held by, or accessible to, third parties may be compromised.

If a significant cybersecurity event or breach were to occur, we may not be able to fulfill critical business functions and we could (i) experience property damage, disruptions to our business, theft of or unauthorized access to customer, employee, financial or system operation information or other information; (ii) experience loss of revenue or incur significant costs for repair, remediation and breach
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notification, and increased capital and operating costs to implement increased security measures; and (iii) be subject to increased regulation, litigation and reputational damage. If such disruptions or breaches are not detected quickly, their effecteffects could be compounded or could delay our response or the effectiveness of our response and ability to limit our exposure to potential liability. These types of events couldwould also require significant management attention and resources and could have a material adverse impact on our financial condition, results of operations, or cash flows.

We develop and maintain systems and processes aimed at detecting and preventing information and cybersecurity incidents which require significant investment, maintenance, and ongoing monitoring and updating as technologies and regulatory requirements change. These systems and processes may be insufficient to mitigate the possibility of information and cybersecurity incidents, malicious social engineering, fraudulent or other malicious activities, and human error or malfeasance in the safeguarding of our data.

We are subject to laws and rules issued by multiple government agencies concerning safeguarding and maintaining the confidentiality of our security, customer information and business information. One of these agencies, NERC, has issued comprehensive regulations and standards surrounding the security of bulk power systems,

and is continually in the process of developing updated and additional requirements with which the utility industry must comply. The NRC also has issued regulations and standards related to the protection of critical digital assets at commercial nuclear power plants. The increasing promulgation of NERC and NRC rules and standards will increase our compliance costs and our exposure to the potential risk of violations of the standards. Experiencing a cybersecurity incident could cause us to be non-compliant with applicable laws and regulations, such as those promulgated by NERC and the NRC, privacy laws, or contracts that require us to securely maintain confidential data, causing us to incur costs related to legal claims or proceedings and regulatory fines or penalties.

The risk of these system-related events and security breaches occurring continues to intensify. We have experienced, and expect to continue to experience, threats and attempted intrusions to our information technology systems and we could experience such threats and attempted intrusions to our operational control systems. To date, we do not believe we have experienced a material breach or disruption to our network or information systems or our service operations. We willmay not be able to anticipate and prevent all cyberattacks or information security breaches, and our ongoing investments in security resources, talent, and business practices may not be effective against all threat actors. As such attacks continue to increase in sophistication and frequency, we may be unable to prevent all such attacks from being successful in the future.

We maintain cyber insurance to provide coverage for a portion of the losses and damages that may result from a security breach of our information technology systems, but such insurance is subject to a number of exclusions and may not cover the total loss or damage caused by a breach. The market for cybersecurity insurance is relatively new and coverage availableCoverage for cybersecurity events maycontinues to evolve as the industry matures. In the future, adequate insurance may not be available at rates that we believe are reasonable, and the costs of responding to and recovering from a cyber incident may not be covered by insurance or recoverable in rates.

The ownership and operation of power generation and transmission facilities on Indian lands could result in uncertainty related to continued leases, easements, and rights-of-way, which could have a significant impact on our business.
Four Corners and portions of certain APS transmission lines are located on Indian lands pursuant to leases, easements or other rights-of-way that are effective for specified periods.  APS is unable to predict the final outcomes of pending and future approvals by the applicable sovereign governing bodies with respect to renewals of these leases, easements, and rights-of-way.
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There are inherent risks in the ownership and operation of nuclear facilities, such as environmental, health, fuel supply, spent fuel disposal, regulatory and financial risks and the risk of terrorist attack that could adversely affect our business and financial condition.
APS has an ownership interest in and operates on behalf of a group of participants, Palo Verde, which is the largest nuclear electric generating facility in the United States.  Palo Verde constitutes approximately 18% of ourAPS’s owned and leased generation capacity.  Palo Verde is subject to environmental, health and financial risks, such as the ability to obtain adequate supplies of nuclear fuel; the ability to dispose of spent nuclear fuel; the ability to maintain adequate reserves for decommissioning; potential liabilities arising out of the operation of these facilities; the costs of securing the facilities against possible terrorist attacks; and unscheduled outages due to equipment and other problems.  APS maintains nuclear decommissioning trust funds and external insurance coverage to minimize its financial exposure to some of these risks; however, it is possible that damages could exceed the amount of insurance coverage.  In addition, APS may be required under federal law to pay up to $120.1 million (but not more than $17.9 million per year) of liabilities arising out of a nuclear incident occurring not only at Palo Verde, but at any other nuclear power reactorplant in the United States. In addition, APS is subject to retrospective premium adjustments under its nuclear property insurance policies with Nuclear Electric Insurance Limited (“NEIL”) for approximately $22.3 million if NEIL’s losses in any policy year exceed accumulated funds and if the retrospective premium assessment is declared by NEIL’s Board of Directors. Although we haveAPS has no reason to anticipate a serious nuclear incident at Palo Verde, if an incident did occur, it could materially and adversely affect our results of operations and financial condition.  A major incident at a nuclear facility anywhere in the world could cause the NRC to limit or prohibit the operation or licensing of any domestic nuclear unit and to promulgate new regulations that could require significant capital expenditures and/or increase operating costs.
The use of derivative contracts in the normal course of our business could result in financial losses that negatively impact our results of operations.
APS’s operations include managing market risks related to commodity prices.  APS is exposed to the impact of market fluctuations in the price and transportation costs of electricity, natural gas and coal to the extent that unhedged positions exist.  We have established procedures to manage risks associated with these market fluctuations by utilizing various commodity derivatives, including exchange traded futures and over-the-counter forwards, options, and swaps.  As part of our overall risk management program, we enter into derivative transactions to hedge purchases and sales of electricity and fuels.  The changes in market value of such contracts have a high correlation to price changes in the hedged commodity.  To the extent that commodity markets are illiquid, we may not be able to execute our risk management strategies, which could result in greater unhedged positions than we would prefer at a given time and financial losses that negatively impact our results of operations.
The Dodd-Frank Wall Street Reform and Consumer Protection Act (“Dodd-Frank Act”) contains measures aimed at increasing the transparency and stability of the over-the counter ("OTC") derivative markets and preventing excessive speculation. The Dodd-Frank Act could restrict, among other things, trading positions in the energy futures markets, require different collateral or settlement positions, or increase regulatory reporting over derivative positions. Based on the provisions included in the Dodd-Frank Act and the implementation of regulations, these changes could, among other things, impact our ability to hedge commodity price and interest rate risk or increase the costs associated with our hedging programs.
We are exposed to losses in the event of nonperformance or nonpayment by counterparties.  We use a risk management process to assess and monitor the financial exposure of all counterparties.  Despite the fact that the majority of APS’s trading counterparties are rated as investment grade by the rating agencies, there is still a possibility that one or more of these companies could default, which could result in a material adverse impact on our earnings for a given period.

Changes in technology could create challenges for APS’s existing business.
Alternative energy technologies that produce power or reduce power consumption or emissions are being developed and commercialized, including renewable technologies such as photovoltaic (solar) cells, customer-sited generation, energy storage (batteries) and efficiency technologies.  Advances in technology and equipment/appliance efficiency could reduce the demand for supply from conventional generation, including carbon-free nuclear generation, and increase the complexity of managing APS'sAPS’s information technology and power system operations, which could adversely affect APS’s business.

Customer-sited alternative energy technologies present challenges to APS’s operations due to misalignment with APS’s existing operational needs. When these resources lack “dispatchability” and other elements of utility-side control, they are considered “unmanaged” resources. The cumulative effect of such unmanaged resources results in added complexity for APS’s system management.
APS continues to pursue and implement advanced grid technologies, including transmission and distribution system technologies and digital meters enabling two-way communications between the utility and its customers.  Many of the products and processes resulting from these and other alternative technologies, including energy storage technologies, have not yet been widely used or tested on a long-term basis, and their use on large-scale systems is not as established or mature as APS’s existing technologies and equipment.  The implementation of new and additional technologies adds complexity to our information technology and operational technology systems, which could require additional infrastructure and resources. Widespread installation and acceptance of new technologies could also enable the entry of new market participants, such as technology companies, into the interface between APS and its customers and could have other unpredictable effects on APS’s traditional business model.

Deployment of renewable energy technologies is expected to continue across the western states and result in a larger portion of the overall energy production coming from these sources. These trends, which
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have benefited from historical and continuing government support for certain technologies, have the potential to put downward pressure on wholesale power prices throughout the western states which could make APS'sAPS’s existing generating facilities less economical and impact their operational patterns and long-term viability.
We are subject to employee workforce factors that could adversely affect our business and financial condition.
Like many companies in the electric utility industry, our workforce is maturing, with approximately 35%30% of employees eligible to retire by the end of 2024.2027. Although we have undertaken efforts to recruit, train and develop new employees, we face increased competition for talent. We are subject to other employee workforce factors, such as the availability and retention of qualified personnel and the need to negotiate collective bargaining agreements with union employees. These or other employee workforce factors could negatively impact our business, financial condition, or results of operations.
COVID-19 could negatively affect our business. 

COVID-19 is a continually developing situation around the globe that has led to economic disruption and volatility in the financial markets. The spread of COVID-19 and efforts to contain the virus and mitigate its public health effects, could decrease demand for energy, lower economic growth, impact our employees and contractors, cause disruptions in our supply chain, increase certain costs, further increase volatility in the capital markets (and result in increases in the cost of capital or an inability to access the capital markets or draw on available credit facilities), delay the completion of capital or other construction projects and other operations and maintenance activities, delay payments or increase uncollectable accounts, impact our ability to hire or retain qualified employees, or cause other unpredictable events, each of which could adversely affect our business, results of operations, cash flows or financial condition.
FINANCIAL RISKS
Financial market disruptions or new rules or regulations may increase our financing costs or limit our access to various financial markets, which may adversely affect our liquidity and our ability to implement our financial strategy.
Pinnacle West and APS rely on access to credit markets as a significant source of liquidity and the capital markets for capital requirements not satisfied by cash flow from our operations.  We believe that we will maintain sufficient access to these financial markets.  However, certain market disruptions or rules or regulations may cause our cost of borrowing to increase generally, and/or otherwise adversely affect our ability to access these financial markets.
In addition, the credit commitments of our lenders under our bank facilities may not be satisfied or continued beyond current commitment periods for a variety of reasons, including new rules and regulations, periods of financial distress or liquidity issues affecting our lenders or financial markets, which could materially adversely affect the adequacy of our liquidity sources and the cost of maintaining these sources.
Changes in economic conditions, monetary policy, financial regulation or other factors could result in higher interest rates, which would increase interest expense on our existing variable rate debt and new debt we expect to issue in the future, and thus reduce funds available to us for our current plans.

Additionally, an increase in our leverage, whether as a result of these factors or otherwise, could adversely affect us by:

causing a downgrade of our credit ratings;
increasing the cost of future debt financing and refinancing;
increasing our vulnerability to adverse economic and industry conditions; and
requiring us to dedicate an increased portion of our cash flow from operations to payments on our debt, which would reduce funds available to us for operations, future investment in our business or other purposes.

A downgrade of our credit ratings could materially and adversely affect our business, financial condition, and results of operations.
Our current ratings are set forth in “Liquidity and Capital Resources — Credit Ratings” in Item 7.  We cannot be sure that any of our current ratings will remain in effect for any given period of time or that a rating will not be lowered or withdrawn entirely by a rating agency if, in its judgment, circumstances in the future so warrant.  Any downgrade or withdrawal could adversely affect the market price of Pinnacle West’s and APS’s securities, limit our access to capital and increase our borrowing costs, which would adversely impact our financial results.  We could be required to pay a higher interest rate for future financings, and our potential pool of investors and funding sources could decrease.  In addition, borrowing costs under our existing credit facilities depend on our credit ratings.  A downgrade could also require us to provide additional support in the form of letters of credit or cash or other collateral to various counterparties.  If our short-term ratings were to be lowered, it could severely limit access to the commercial paper market.  We note that the ratings from rating agencies are not recommendations to buy, sell or hold our securities and that each rating should be evaluated independently of any other rating.

Investment performance, changing interest rates, new rules or regulations and other economic, social, and political factors could decrease the value of our benefit plan assets, nuclear decommissioning trust funds and other special use funds or increase the valuation of our related obligations, resulting in significant additional funding requirements.  We are also subject to risks related to the provision of employee healthcare benefits and healthcare reform legislation.  Any inability to fully recover these costs in our utility rates would negatively impact our financial condition.
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We have significant pension plan and other postretirement benefits plan obligations to our employees and retirees, and legal obligations to fund our pension trust and nuclear decommissioning trusts for Palo Verde.  We hold and invest substantial assets in these trusts that are designed to provide funds to pay for certain of these obligations as they arise.  Declines in market values of the fixed income and equity securities held in these trusts may increase our funding requirements into the related trusts.  Additionally, the valuation of liabilities related to our pension plan and other postretirement benefit plans are impacted by a discount rate, which is the interest rate used to discount future pension and other postretirement benefit obligations.  Declining interest rates decrease the discount rate, increase the valuation of the plan liabilities, and may result in increases in pension and other postretirement benefit costs, cash contributions, regulatory assets, and charges to OCI.  Changes in demographics, including increased number of retirements or changes in life expectancy and changes in other actuarial assumptions, may also result in similar impacts.  The minimum contributions required under these plans are impacted by federal legislation and related regulations.  Increasing liabilities or otherwise increasing funding requirements under these plans, resulting from adverse changes in legislation or otherwise, could result in significant cash funding obligations that could have a material impact on our financial position, results of operations, or cash flows.
We recover most of the pension costs and other postretirement benefit costsexpense and all of the currently estimated nuclear decommissioning costs in our regulated rates.  Any inability to fully recover these costs in a timely manner wouldcould have a material negative impact on our financial condition, results of operations, or cash flows.
While most of the Patient Protection and Affordable Care Act provisions have been implemented, changes to or repeal of that Act and pendingPending or future federal or state legislative or regulatory activity or court proceedings could increase costs of providing medical insurance for our employees and retirees. Any potential changes and resulting cost impacts cannot be determined with certainty at this time.
Our cash flow depends on the performance of APS and its ability to make distributions.
We derive essentially all of our revenues and earnings from our wholly-owned subsidiary, APS.  Accordingly, our cash flow and our ability to pay dividends on our common stock is dependent upon the earnings and cash flows of APS and its distributions to us.  APS is a separate and distinct legal entity and has no obligation to make distributions to us.
APS’s financing agreements may restrict its ability to pay dividends, make distributions or otherwise transfer funds to us.  In addition, an ACC financing order requires APS to maintain a common equity ratio of at least 40% and does not allow APS to pay common dividends if the payment would reduce its common equity below that threshold.  The common equity ratio, as defined in the ACC order, is total shareholder equity divided by the sum of total shareholder equity and long-term debt, including current maturities of long-term debt.

Pinnacle West’s ability to meet its debt service obligations could be adversely affected because its debt securities are structurally subordinated to the debt securities and other obligations of its subsidiaries.
Because Pinnacle West is structured as a holding company, all existing and future debt and other liabilities of its subsidiaries will be effectively senior in right of payment to its own debt securities.  The assets and cash flows of our subsidiaries will be available, in the first instance, to service their own debt and other obligations.  Our ability to have the benefit of their cash flows, particularly in the case of any insolvency or financial distress affecting our subsidiaries, would arise only through our equity ownership interests in our subsidiaries and only after their creditors have been satisfied.
The use of derivative contracts in the normal course of our business could result in financial losses that negatively impact our results of operations.
APS’s operations include managing market risks related to commodity prices.  APS is exposed to the impact of market fluctuations in the price and transportation costs of electricity, natural gas, and coal to
45

the extent that unhedged positions exist.  We have established procedures to manage risks associated with these market fluctuations by utilizing various commodity derivatives, including exchange traded futures and over-the-counter (“OTC”) forwards, options, and swaps.  As part of our overall risk management program, we enter into derivative transactions to hedge purchases and sales of electricity and natural gas.  The changes in market value of such contracts have a high correlation to price changes in the hedged commodity.  To the extent that commodity markets are illiquid, we may not be able to execute our risk management strategies, which could result in greater unhedged positions than we would prefer at a given time and financial losses that negatively impact our results of operations.
The Dodd-Frank Wall Street Reform and Consumer Protection Act (“Dodd-Frank Act”) contains measures aimed at increasing the transparency and stability of the over-the-counter derivative markets and preventing excessive speculation. The Dodd-Frank Act could restrict, among other things, trading positions in the energy futures markets, require different collateral or settlement positions, or increase regulatory reporting over derivative positions. Based on the provisions included in the Dodd-Frank Act and the implementation of regulations, these changes could, among other things, impact our ability to hedge commodity price and interest rate risk or increase the costs associated with our hedging programs.
We are exposed to losses in the event of nonperformance or nonpayment by counterparties.  We use a risk management process to assess and monitor the financial exposure of all counterparties.  Despite the fact that the majority of APS’s trading counterparties are rated as investment grade by the rating agencies, there is still a possibility that one or more of these companies could default, which could result in a material adverse impact on our earnings for a given period.
GENERAL RISKS
Proposals to change policy in Arizona or other states made through ballot initiatives or referenda may increase the Company’s cost of operations or impact its business plans.
In Arizona and other states, a person or organization may file a ballot initiative or referendum with the Arizona Secretary of State or other applicable state agency and, if a sufficient number of verifiable signatures are presented, the initiative or referendum may be placed on the ballot for the public to vote on the matter. Ballot initiatives and referenda may relate to any matter, including policy and regulation related to the electric industry, and may change statutes or the state constitution in ways that could impact Arizona utility customers, the Arizona economy, and the Company. Some ballot initiatives and referenda are drafted in an unclear manner and their potential industry and economic impact can be subject to varied and conflicting interpretations. We may oppose certain initiatives or referenda (including those that could result in negative impacts to our customers, the state, or the Company) via the electoral process, litigation, traditional legislative mechanisms, agency rulemaking or otherwise, which could result in significant costs to the Company. The passage of certain initiatives or referenda could result in laws and regulations that impact our business plans and have a material adverse impact on our financial condition, results of operations, or cash flows.
General economic conditions could materially affect our business, financial condition, and results of operations.
General economic factors that are beyond the Company’s control impact the Company’s forecasts and actual performance. These factors include interest rates; recession; inflation; stagflation; deflation; supply chain constraints; unemployment trends; sanctions, trade restrictions, military interventions and the threat or possibility of war; terrorism or other global or national unrest; and political or financial instability. In particular, during 2021 and 2022, the United States’ economy has experienced a substantial rise in the inflation rate. There is increased uncertainty as to whether the rise in inflation will continue and for how long. Increases in inflation raise the Company’s costs for commodities, labor, materials and services. Additionally, COVID-19 severely impacted global supply chains, resulting in equipment delays and
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increased costs. A failure to recover the increased costs caused by increased inflation and supply chain constraints through our rates could have a material adverse impact on our financial condition, results of operations, or cash flows.
The market price of our common stock may be volatile.
The market price of our common stock could be subject to significant fluctuations in response to factors such as the following, some of which are beyond our control:
variations in our quarterly operating results;
operating results that vary from the expectations of management, securities analysts, and investors;
changes in expectations as to future financial performance, including financial estimates by securities analysts and investors;
developments generally affecting industries in which we operate;
announcements by us or our competitors of significant contracts, acquisitions, joint marketing relationships, joint ventures, or capital commitments;
announcements by third parties of significant claims or proceedings against us;
favorable or adverse regulatory or legislative developments;
our dividend policy;
change in our management;
future sales by the Company of equity or equity-linked securities; and
general domestic and international economic conditions.

In addition, the stock market in general has experienced volatility that has often been unrelated to the operating performance of a particular company.  These broad market fluctuations may adversely affect the market price of our common stock.
Financial market disruptions or new rules or regulations may increase our financing costs or limit our access to various financial markets, which may adversely affect our liquidity and our ability to implement our financial strategy.
Pinnacle West and APS rely on access to credit markets as a significant source of liquidity and the capital markets for capital requirements not satisfied by cash flow from our operations.  We believe that we will maintain sufficient access to these financial markets.  However, certain market disruptions or revisions to rules or regulations may cause our cost of borrowing to increase generally, and/or otherwise adversely affect our ability to access these financial markets.
In addition, the credit commitments of our lenders under our bank facilities may not be satisfied or continued beyond current commitment periods for a variety of reasons, including new rules and regulations, changes to the internal policies of our lenders, periods of financial distress or liquidity issues affecting our lenders or financial markets, which could materially adversely affect the adequacy of our liquidity sources and/or the cost of maintaining these sources.
Changes in economic conditions, monetary policy, fiscal policy, financial regulation, rating agency treatment and/or other factors could result in higher interest rates, which would increase interest expense on our existing variable rate debt and new debt we expect to issue in the future, and thus increase the cost and/or reduce the amount of funds available to us for our current plans.
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Additionally, an increase in our leverage, whether as a result of these factors or otherwise, could adversely affect us by:
causing a downgrade of our credit ratings;
increasing the cost of future debt financing and refinancing;
increasing our vulnerability to adverse economic and industry conditions; and
requiring us to dedicate an increased portion of our cash flow from operations to payments on our debt, which would reduce funds available to us for operations, future investment in our business or other purposes.
Certain provisions of our articles of incorporation and bylaws and of Arizona law make it difficult for shareholders to change the composition of our board and may discourage takeover attempts.
These provisions, which could preclude our shareholders from receiving a change of control premium, include the following:
restrictions on our ability to engage in a wide range of “business combination” transactions with an “interested shareholder” (generally, any person who beneficially owns 10% or more of our outstanding voting power, or any of our affiliates or associates who beneficially owned 10% or more of our outstanding voting power at any time during the prior three years) or any affiliate or associate of an interested shareholder, unless specific conditions are met;
anti-greenmail provisions of Arizona law and our bylaws that prohibit us from purchasing shares of our voting stock from beneficial owners of more than 5% of our outstanding shares unless specified conditions are satisfied;
the ability of the Board of Directors to increase the size of and fill vacancies on the Board of Directors, whether resulting from such increase, or from death, resignation, disqualification or otherwise;

the ability of our Board of Directors to issue additional shares of common stock and shares of preferred stock and to determine the price and, with respect to preferred stock, the other terms, including preferences and voting rights, of those shares without shareholder approval;
restrictions that limit the rights of our shareholders to call a special meeting of shareholders; and
restrictions regarding the rights of our shareholders to nominate directors or to submit proposals to be considered at shareholder meetings.
While these provisions may have the effect of encouraging persons seeking to acquire control of us to negotiate with our Board of Directors, they could enable the Board of Directors to hinder or frustrate a transaction that some, or a majority, of our shareholders might believe to be in their best interests and, in that case, may prevent or discourage attempts to remove and replace incumbent directors.

ITEM 1B.  UNRESOLVED STAFF COMMENTS
 
Neither Pinnacle West nor APS has received written comments regarding its periodic or current reports from the SEC staff that were issued 180 days or more preceding the end of its 20192022 fiscal year and that remain unresolved.


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ITEM 2.  PROPERTIES
Generation Facilities
APS
APS’s portfolio of owned generating facilities as of December 31, 20192022 is provided in the table below:
NameNo. of
Units
%
Owned (a)
Principal
Fuels
Used
Primary
Dispatch
Type
Owned
Capacity
(MW)
Nuclear:     
Palo Verde (b)329.1 %UraniumBase Load1,146 
Total Nuclear    1,146 
Steam:     
Four Corners 4, 5 (c)263 %CoalBase Load970 
Cholla 1,32 CoalBase Load387 
Total Steam    1,357 
Combined Cycle:     
Redhawk (d)2 GasLoad Following1,088 
West Phoenix5 GasLoad Following887 
Total Combined Cycle    1,975 
Combustion Turbine:     
Ocotillo (e)7 GasPeaking620 
Saguaro3 GasPeaking189 
Douglas1 OilPeaking16 
Sundance10 GasPeaking420 
West Phoenix2 GasPeaking110 
Yucca 1, 2, 33 GasPeaking93 
Yucca 41 OilPeaking54 
Yucca 5, 62 GasPeaking96 
Total Combustion Turbine    1,598 
Solar:     
Cotton Center (f)1 SolarAs Available17 
Hyder I (f)1 SolarAs Available17 
Paloma (f)1 SolarAs Available17 
Chino Valley1 SolarAs Available20 
Gila Bend (f)1SolarAs Available36 
Hyder II (f)1 SolarAs Available14 
Foothills (f)1 SolarAs Available38 
Luke AFB1SolarAs Available11 
Desert Star (f)1SolarAs Available10 
Red Rock1SolarAs Available44 
APS Owned Distributed Energy  SolarAs Available36 
Multiple facilities  SolarAs Available
Total Solar    264 
Total Capacity    6,340 
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(a)100% unless otherwise noted.
(b)APS’s 29.1% ownership in Palo Verde includes leased interests and is the largest capacity interest of all the participants. See “Business of Arizona Public Service Company — Energy Sources and Resource Planning — Generation Facilities — Nuclear” in Item 1 for details regarding leased interests in Palo Verde. The other participants are Salt River Project, SCE, El Paso, Public Service Company of New Mexico, Southern California Public Power Authority, and Los Angeles Department of Water & Power.
Name 
No. of
Units
 
%
Owned (a)
 
Principal
Fuels
Used
 
Primary
Dispatch
Type
 
Owned
Capacity
(MW)
Nuclear:    
      
Palo Verde (b) 3 29.1% Uranium Base Load 1,146
Total Nuclear    
     1,146
Steam:    
      
Four Corners 4, 5 (c) 2 63% Coal Base Load 970
Cholla 1,3 2  
 Coal Base Load 387
Navajo (d)    Coal Base Load 
Ocotillo (e)   
 Gas Peaking 
Total Steam    
     1,357
Combined Cycle:    
      
Redhawk (f) 2  
 Gas Load Following 1,088
West Phoenix 5  
 Gas Load Following 887
Total Combined Cycle    
     1,975
Combustion Turbine:    
      
Ocotillo (e) 7  
 Gas Peaking 620
Saguaro 3  
 Gas Peaking 189
Douglas/Fairview 1  
 Oil Peaking 16
Sundance 10  
 Gas Peaking 420
West Phoenix 2  
 Gas Peaking 110
Yucca 1, 2, 3 3  
 Gas Peaking 93
Yucca 4 1  
 Oil Peaking 54
Yucca 5, 6 2  
 Gas Peaking 96
Total Combustion Turbine    
     1,598
Solar:    
      
Cotton Center (g) 1  
 Solar As Available 17
Hyder I (g) 1  
 Solar As Available 16
Paloma (g) 1  
 Solar As Available 17
Chino Valley 1  
 Solar As Available 19
Gila Bend (g) 1   Solar As Available 32
Hyder II (g) 1  
 Solar As Available 14
Foothills (g) 1  
 Solar As Available 35
Luke AFB 1   Solar As Available 10
Desert Star (g) 1   Solar As Available 10
Red Rock 1   Solar As Available 40
APS Owned Distributed Energy    
 Solar As Available 26
Multiple facilities    
 Solar As Available 4
Total Solar    
     240
Total Capacity    
     6,316
(c)The other participants are Salt River Project (10%), Public Service Company of New Mexico (13%), Tucson Electric Power Company (7%) and NTEC (7%).  The plant is operated by APS. 

(d)Redhawk generation capacity increased by 104 MW following the Advanced Gas Path upgrade installed on both units.
(a)100% unless otherwise noted.
(b)Our 29.1% ownership in Palo Verde includes leased interests. See “Business of Arizona Public Service Company — Energy Sources and Resource Planning — Generation Facilities — Nuclear” in Item 1 for details regarding leased interests in Palo Verde.  The other participants are Salt River Project (17.49%), SCE (15.8%), El Paso (15.8%), Public Service Company of New Mexico (10.2%), Southern California Public Power Authority (5.91%), and Los Angeles Department of Water & Power (5.7%).  The plant is operated by APS.
(c)
The other participants are Salt River Project (10%), Public Service Company of New Mexico (13%), Tucson Electric Power Company (7%) and NTEC
(e)Ocotillo Steam Units 1 and 2 were retired on January 10, 2019. Units 3 through 7 all went into service on or prior to May 30, 2019, which increased generation capacity by 510 MW.
(f)APS is under contract and currently plans to add battery storage at these AZ Sun sites. See “Business of Arizona Public Service Company — Energy Sources and Resource Planning — Energy Storage” above for details related to these and other energy storage agreements.

(7%).  The plant is operated by APS. 
(d)Unit 3 was retired in October 2019 with Units 1 and 2 following in November 2019.
(e)Ocotillo Steam Units 1 and 2 were retired on January 10, 2019. Units 3 through 7 all went into service on or prior to May 30, 2019 which increased generation capacity by 510 MW.
(f)Redhawk generation capacity increased by 104 MW following the Advanced Gas Path upgrade installed on both units.
(g)APS is under contract and currently plans to add battery storage at these AZ Sun sites. Due to the McMicken battery energy storage equipment failure, APS is working with the counterparty for the AZ Sun sites to determine appropriate timing and path forward for such facilities. (See "Business of Arizona Public Service Company - Energy Sources and Resource Planning - Energy Storage" above for details related to these and other energy storage agreements.)

See “Business of Arizona Public Service Company — Environmental Matters” in Item 1 with respect to matters having a possible impact on the operation of certain of APS’s generating facilities.
 
See “Business of Arizona Public Service Company” in Item 1 for a map detailing the location of APS’s major power plants and principal transmission lines.

4CA

4CA, a wholly-owned subsidiary of Pinnacle West, purchased El Paso's 7% interest in Units 4 and 5 of Four Corners on July 6, 2016 and subsequently sold the interest to NTEC on July 3, 2018. (See "Business of Arizona Public Service Company - Energy Sources and Resource Planning - Generation Facilities - Coal-Fueled Generating Facilities - Four Corners" in Item 1 and "Four Corners - 4CA Matter" in Note 11 for additional information about 4CA's interest in Four Corners.)
Transmission and Distribution Facilities
 
Current Facilities.  As of January 3, 2023, APS’s transmission facilities consist of approximately 6,1925,828 pole miles of overhead lines and approximately 4985 miles of underground lines, 5,9695,768 miles of which are located in Arizona.  APS’s distribution facilities consist of approximately 11,191 11,276 miles of overhead lines and approximately 22,09223,082 miles of underground primary cable (20,021 when excluding abandoned conductor), all of which are located in Arizona. APS also owns and maintains 469 substations, including both transmission and distribution yards. APS shares ownership of some of its transmission facilities with other companies. 




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The following table shows APS’s jointly-owned interests in those transmission facilities recorded on the Consolidated Balance Sheets at December 31, 2019:
2022:
Percent Owned

(Weighted-Average)
Morgan — Pinnacle Peak System64.664.7 %
Palo Verde — Rudd 500kV System50.0%
Round Valley System50.0%
ANPP 500kV System33.533.4 %
Navajo Southern System26.726.8 %
Four Corners Switchyards63.061.9 %
Palo Verde — Yuma 500kV System19.025.4 %
Phoenix — Mead System17.1%
Palo Verde — Morgan System88.987.8 %
Hassayampa — North Gila System80.0%
Cholla 500kV Switchyard85.7%
Saguaro 500kV Switchyard60.0%
Kyrene - Knox System50.0%
Agua Fria Switchyard10.0 %
 
Expansion. Each year APS prepares and files with the ACC a ten-year transmission plan.Ten-Year Transmission Plan.  In APS’s 2020 plan,2023 Ten-Year Plan, APS projects it will develop 2984 miles of new transmission lines over the next ten10 years. One significant project,Additionally, APS plans to upgrade 55 miles of existing transmission lines over the Palo Verde to Morgan project recently completed all phases and providessame horizon. The 2023 Ten-Year Plan includes a new 25-mile 500kV path that spansline from the Palo Verde hub aroundJojoba substation to the westernRudd substation. The purpose of this 500kV line project is to bring in a new source to the west and northern edgessouthwest parts of the Phoenix metropolitan area and terminates at a bulk substationwhich is experiencing rapid economic development. In addition, this new source will provide customers in the northeast partarea greater access to a diverse mix of Phoenix.resources from around the region. The Palo Verde to Morgan project2023 Ten-Year Plan includes Palo Verde-Delaney-Sun Valley-Morgan-Pinnacle Peak. The project consisted of four phases and the fourth phase, Morgan to Sun Valley 500kV, was energized in April of 2018. In total, the project consisted of over 100 miles of new 500kV lines, with many of those miles constructednumerous projects with the capabilitypurpose to employ a 230kV line as a second circuit.

APS continues to work with regulators to identify transmission projects necessary to supportinterconnect new renewable energy facilities. Two such projects, which have been completed and were included in previous APS transmission plans, are the Delaneyresources to Palo Verde line and the North Gila to Hassayampa line, both of which support the transmission of renewable energy to Phoenix and California. The North Gila to Hassayampa line went into service in May 2015 and the Delaney to Palo Verde line went into service in May 2016.

system.

NERC Critical Infrastructure Protection Reliability Standards.  Since 2014, APS has been implementing a comprehensive project to ensure compliance with NERC's Critical Infrastructure Protection Reliability Standards ("CIP").  APS completed substantial implementation in the fourth quarter of 2019 for compliance with CIP standards that became effective January 1, 2020.

Plant and Transmission Line Leases and Rights-of-Way on Indian Lands
 
The Navajo Plant and Four Corners are located on land held under leases from the Navajo Nation and also under rights-of-way from the federal government.  The co-owners of the Navajo Plant and the Navajo Nation agreed that the Navajo Plant would remainceased operations in operation until December 2019 under the existing plant lease.November 2019. The co-owners and the Navajo Nation executed a lease extension on November 29, 2017, that allows for decommissioning activities to begin after the plant ceased operations in November 2019.operations.

APS, on behalf of the Four Corners participants, negotiated amendments to the Four Corners facility lease with the Navajo Nation, which extends the Four Corners leasehold interest from 2016 to 2041.  See

"Business “Business of Arizona Public Service Company - Energy Sources and Resource Planning - Generating— Generation Facilities - Coal-Fueled Generating Facilities - Four Corners"Corners” in Item 1 for additional information about the Four Corners right-of-way and lease matters.

Certain portions of our transmission lines are located on Indian lands pursuant to rights-of-way that are effective for specified periods.  Some of these rights-of-way have expired and our renewal applications have not yet been acted upon by the appropriate Indian tribes or federal agencies.  Other rights expire at various times in the future and renewal action by the applicable tribe or federal agencies will be required at that time.  In recent negotiations, certain of the affected Indian tribes have required payments substantially
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in excess of amounts that we have paid in the past for such rights-of-way.  The ultimate cost of renewal of certain of the rights-of-way for our transmission lines is therefore uncertain.


ITEM 3.  LEGAL PROCEEDINGS
 
See “Business of Arizona Public Service Company — Environmental Matters” in Item 1 with regard to pending or threatened litigation and other disputes.
See Note 43 for ACC and FERC-related matters.
See Note 1110 for information regarding environmental matters, and Superfund–related matters.matters and other disputes. 

ITEM 4.  MINE SAFETY DISCLOSURES
 
Not applicable.


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INFORMATION ABOUT OUR EXECUTIVE OFFICERS
Pinnacle West’s executive officers are elected no less often than annually and may be removed by the Board of Directors, or in certain cases also by the Human Resources Committee, at any time.any time.  The executive officers, their ages at February 21, 2020,27, 2023, current positions and principal occupations for the past five years are as follows:
NameAgePositionPeriod
Jeffrey B. Guldner5457Chairman of the Board, President and Chief Executive OfficeOfficer and President of Pinnacle West; West2019-Present
Chairman of the Board and Chief Executive Officer of APS2019-Present2022-Present
Chairman of the Board, Chief Executive Officer and President of APS2018-20202021-2022
Chairman of the Board and Chief Executive Officer of APS2020-2021
President of APS2018-2020
Executive Vice President, Public Policy of Pinnacle West2017-2019
Executive Vice President, Public Policy of APS2017-2018
General Counsel of Pinnacle West and APS2017-2018
Senior Vice President, Public Policy of APS2014-2017
Robert S. Bement64Executive Vice President and Special Advisor to the Chief Executive Officer of APS2020-Present
Executive Vice President and Chief Nuclear Officer, PVGS, of APS2016-2020
Senior Vice President, Site Operations, PVGS, of APS2011-2016
Elizabeth A. Blankenship4851Vice President, Controller and Chief Accounting Officer of Pinnacle West and APS2019-Present
General Manager, Accounting Operations of APS2019-2019
Director, Accounting Operations of APS2014-2019
Donna M. EasterlyAndrew D. Cooper5544Senior Vice President, Human Resources of APS2020-Present
Vice President, Human Resources and Ethics of APS2017-2020
Vice President, Chief Procurement Officer of APS2014-2017
Daniel T. Froetscher58President and Chief Operating Officer of APS2020-Present
Executive Vice President, Operations of APS2018-2020
Senior Vice President, Transmission, Distribution & Customers of APS2014-2018
Theodore N. Geisler41Senior Vice President and Chief Financial Officer of Pinnacle West and APS2020-Present2022-Present
Vice President and Treasurer of Pinnacle West and APS2020-2022
Director, Corporate Finance of Consolidated Edison Company of New York, Inc.2017-2020
Donna M. Easterly58Senior Vice President, Human Resources of APS2020-Present
Vice President, Human Resources and Ethics of APS2017-2020
Jose L. Esparza48Senior Vice President, Public Policy of APS2022-Present
Vice President, Regulatory of APS2022
Officer and Senior Vice President, Customer Engagement and Information Technology of Southwest Gas2019-2021
Vice President, Customer Engagement of Southwest Gas2012-2019
Theodore N. Geisler44President of APS2022-Present
Senior Vice President and Chief Financial Officer of Pinnacle West and APS2020-2022
Vice President and Chief Information Officer of APS2018-2020
General Manager, Transmission and Distribution Operations and Maintenance of APS2017-2018
Adam C. Heflin59Director, Investor Relations of Pinnacle West2016-2017
Director, Transmission Operations and Maintenance of APS2013-2016
James R. Hatfield62Chief Administrative Officer and Treasurer of Pinnacle West and APS2020-Present
Executive Vice President of Pinnacle West and APS2012-Present
Chief Financial Officer of Pinnacle West and APS2008-2020
Maria L. Lacal59Executive Vice President and Chief Nuclear Officer, PVGS, of APS2020-Present2022-Present
Senior Vice President, Regulatory and Oversight, PVGS,Chief Executive Officer of APSWolf Creek Nuclear Operating Corporation2016-20202014-2019
Paul J. Mountain45Vice President, Regulatory and Oversight, PVGS, of APS2015-2016
Vice President, Operations Support, PVGS, of APS2011-2015
Barbara D. Lockwood53Senior Vice President, Public Policy of APS2020-Present
Vice President, Regulation of APS2015-2020
General Manager, Regulatory Policy and Compliance of APS2014-2015
Lee R. Nickloy (a)53Vice President and Treasurer of Pinnacle West and APS2010-Present2022-Present
Vice President, Finance and Planning of Pinnacle West and APS2020-2022
General Manager, Finance of Pinnacle West2017-2020
Robert E. Smith5053Executive Vice President, General Counsel and Chief Development Officer of Pinnacle West and APS2021-Present
Senior Vice President and General Counsel of Pinnacle West and APS2018-Present2018-2021
Jacob Tetlow50Executive Vice President, Operations of APS2021-Present
Senior Vice President, Non-Nuclear Operations of APS2020-2021
Vice President, Transmission and General CounselDistributions Operations of Columbia Pipeline Group, Inc.APS2014-20162017-2020
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(a) Lee R. Nickloy is retiring from Pinnacle West and APS on March 2, 2020.

PART II

 ITEM 5.  MARKET FOR REGISTRANTS’ COMMON EQUITY, RELATED
STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES
Pinnacle West’s common stock is publicly held and is traded on the New York Stock Exchange under stock symbol PNW.  At the close of business on February 14, 2020,21, 2023, Pinnacle West’s common stock was held of record by approximately 16,94215,182 shareholders.
APS’s common stock is wholly-owned by Pinnacle West and is not listed for trading on any stock exchange.  The sole holder of APS’s common stock, Pinnacle West, is entitled to dividends when and as declared out of legally available funds.  At December 31, 2019,2022, APS did not have any outstanding preferred stock.

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ITEM 6.  SELECTED FINANCIAL DATAStock Performance Chart
PINNACLE WEST CAPITAL CORPORATION – CONSOLIDATED

The selected data presented below as of and forThis graph compares the cumulative total shareholder return on Pinnacle West’s common stock during the five years ended December 31, 2019, 2018,2022, to the cumulative total returns on the S&P 500 Index and the Edison Electric Index. The comparison assumes that $100 was invested on December 31, 2017, 2016in Pinnacle West’s common stock and 2015 are derived fromin each of the Consolidated Financial Statements. The data should be read in connection withindices shown and that all of the Consolidated Financial Statements including the related notes included in Item 8dividends were reinvested.

pnw-20221231_g4.jpg

Years Ended December 31,
Company/Index201720182019202020212022
Pinnacle West Common Stock$100$104$113$104$96$109
Edison Electric Institute Index$100$104$130$129$151$153
S&P 500 Index$100$96$126$149$192$156

ITEM 6. [RESERVED]
55

  2019 2018 2017 2016 2015
  (dollars in thousands, except per share amounts)
OPERATING RESULTS  
  
  
  
  
Operating revenues $3,471,209
 $3,691,247
 $3,565,296
 $3,498,682
 $3,495,443
Net income 557,813
 530,540
 507,949
 461,527
 456,190
Less: Net income attributable to noncontrolling interests 19,493
 19,493
 19,493
 19,493
 18,933
Net income attributable to common shareholders $538,320
 $511,047
 $488,456
 $442,034
 $437,257
COMMON STOCK DATA  
  
  
  
  
Book value per share – year-end $48.30
 $46.59
 $44.80
 $43.14
 $41.30
Earnings per weighted-average common share outstanding:  
  
  
  
  
Net income attributable to common shareholders – basic $4.79
 $4.56
 $4.37
 $3.97
 $3.94
Net income attributable to common shareholders – diluted $4.77
 $4.54
 $4.35
 $3.95
 $3.92
Dividends declared per share $3.04
 $2.87
 $2.70
 $2.56
 $2.44
Weighted-average common shares outstanding – basic 112,442,818
 112,129,017
 111,838,922
 111,408,729
 111,025,944
Weighted-average common shares outstanding – diluted 112,758,059
 112,549,722
 112,366,675
 112,046,043
 111,552,130
BALANCE SHEET DATA  
  
  
  
  
Total assets $18,479,247
 $17,664,202
 $17,019,082
 $16,004,253
 $15,028,258
Liabilities and equity:  
  
  
  
  
Current liabilities $2,078,365
 $1,648,964
 $1,197,852
 $1,292,946
 $1,442,317
Long-term debt less current maturities 4,832,558
 4,638,232
 4,789,713
 4,021,785
 3,462,391
Deferred credits and other 6,015,136
 6,028,301
 5,895,787
 5,753,610
 5,404,093
Total liabilities 12,926,059
 12,315,497
 11,883,352
 11,068,341
 10,308,801
Total equity 5,553,188
 5,348,705
 5,135,730
 4,935,912
 4,719,457
Total liabilities and equity $18,479,247
 $17,664,202
 $17,019,082
 $16,004,253
 $15,028,258



SELECTED FINANCIAL DATA
ARIZONA PUBLIC SERVICE COMPANY – CONSOLIDATED
  2019 2018 2017 2016 2015
  (dollars in thousands)
OPERATING RESULTS  
  
  
  
  
Operating revenues $3,471,209
 $3,688,342
 $3,557,652
 $3,498,090
 $3,494,900
Fuel and purchased power costs 1,042,237
 1,094,020
 992,744
 1,082,625
 1,101,298
Other operating expenses 1,741,988
 1,764,554
 1,640,369
 1,556,980
 1,556,670
Operating income 686,984
 829,768
 924,539
 858,485
 836,932
Other income 89,854
 111,015
 60,482
 52,081
 54,225
Interest expense — net of allowance for borrowed funds 201,646
 206,211
 192,051
 183,090
 176,109
Net income before income taxes 575,192
 734,572
 792,970
 727,476
 715,048
Income taxes (9,572) 144,814
 269,168
 245,842
 245,841
Net income 584,764
 589,758
 523,802
 481,634
 469,207
Less: Net income attributable to noncontrolling interests 19,493
 19,493
 19,493
 19,493
 18,933
Net income attributable to common shareholder $565,271
 $570,265
 $504,309
 $462,141
 $450,274
BALANCE SHEET DATA  
  
  
  
  
Total assets $18,370,723
 $17,565,323
 $16,893,751
 $15,931,175
 $14,982,182
Liabilities and equity:  
  
  
  
  
Total equity $5,998,803
 $5,786,797
 $5,385,869
 $5,037,970
 $4,814,794
Long-term debt less current maturities 4,833,133
 4,189,436
 4,491,292
 4,021,785
 3,337,391
Total capitalization 10,831,936
 9,976,233
 9,877,161
 9,059,755
 8,152,185
Current liabilities 1,492,029
 1,576,097
 1,098,274
 1,094,037
 1,424,708
Deferred credits and other 6,046,758
 6,012,993
 5,918,316
 5,777,383
 5,405,289
Total liabilities and equity $18,370,723
 $17,565,323
 $16,893,751
 $15,931,175
 $14,982,182


ITEM 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS
OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

INTRODUCTION
 
The following discussion should be read in conjunction with Pinnacle West’s Consolidated Financial Statements and APS’s Consolidated Financial Statements and the related Notes that appear in Item 8 of this report. This discussion provides a comparison of the 20192022 results with 20182021 results. A comparison of the 20182021 results with 20172020 results can be found in the Annual Report on Form 10-K for the fiscal year ended December 31, 2018.2021.  For information on factors that may cause our actual future results to differ from those we currently seek or anticipate, see “Forward-Looking Statements” at the front of this report and “Risk Factors” in Item 1A.

OVERVIEW
Business Overview

Pinnacle West is an investor-owned electric utility holding company based in Phoenix, Arizona with consolidated assets of about $18$23 billion.For over 130 years, Pinnacle West and our affiliates have provided energy and energy-related products to people and businesses throughout Arizona.

Pinnacle West derives essentially all of our revenues and earnings from our principal subsidiary, APS. APS is Arizona’s largest and longest-serving electric company that generates safe, affordable, and reliable electricity for approximately 1.3 million retail customers in 11 of Arizona’s 15 counties.APS is also the operator and co-owner of Palo Verde - a primary source of electricity for the southwest United States and the largest nuclear power plant in the United States.

Inflation

Overall inflation has grown by 9.5% in Phoenix in 2022, compared to 6.5% nationally; however, APS’s work with national and international companies has helped to partially reduce local cost escalation impacts on APS. The impacts from inflation have varied across separate categories of APS’s spending. Pricing increases across major categories have ranged from 8% to 10% for vendor services and up to 15% to 60% for equipment in 2022. APS has seen specific inflationary impacts in individual spend categories, as well as general inflationary pricing impacts on a broader set of spend categories. Some of the highest increases in 2022 as compared to 2021 have been in chemical costs and contract services.

Even prior to these increases, APS has focused on its customer affordability initiative, which has enabled APS to mitigate inflationary pressure. This initiative includes identifying efficiency opportunities through APS’s LEAN Sigma approach as well as other corporate decisions. For example, APS maintains its inventory to take advantage of lower pricing, when available, and to minimize supply chain delays that can increase the pricing due to expediting fees. Additionally, APS has proactively entered into long-term contracts to hedge against price volatility, which has allowed it to mitigate several procurement spend areas such as transformers.

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Inflation Reduction Act of 2022

On August 16, 2022, President Biden signed the Inflation Reduction Act of 2022 (“IRA”). The IRA significantly expands the availability of tax credits for investments in clean energy generation technologies and energy storage. Key provisions that are relevant to the Company’s clean energy commitment include (i) an extension of tax credits for solar and wind generation, including a new option for solar investments to claim a Production Tax Credit (“PTC”) in lieu of the Investment Tax Credit (“ITC”) beginning in 2022; (ii) expansion of the ITC to cover stand-alone energy storage technology beginning in 2023; and (iii) introduction of a new PTC for nuclear energy produced by existing nuclear energy plants, available from 2024 through 2032. The Internal Revenue Service and U.S. Treasury are expected to issue regulations and other guidance which will provide additional details and clarifications regarding how the Company may be able to claim each of these credits.

In addition, the IRA contains several provisions which could create additional tax liabilities for corporations, including a 15% corporate alternative minimum tax for corporations with net profits in excess of $1 billion and a 1% excise tax on stock buybacks. We currently do not believe the Company will be subject to any material tax liabilities as a result of these legislative provisions.

COVID-19

COVID-19 continues to be an evolving situation. Essential planned work and capital investments continued during the pandemic with priority given to support fire mitigation and summer storm efforts, as well as heat-related outages. Raw material shortages, rising inflation, COVID-19 related work force disruptions and natural disasters continue to place increased pressure on the global supply chain. APS is experiencing some delays in finished materials and tight labor markets. To date, APS has not experienced labor or material supply chain shortages that have significantly impacted its ability to serve its customers’ needs. However, shortages are causing minor delays and shifting of work projects based on material availability. If APS continues to experience delays in materials, it could experience an increase in purchased power costs for summer generation needs. Such increased purchased power costs would be expected to be recoverable through the PSA. See Note 3 for additional information on the PSA. APS has measures in place to continually monitor and evaluate resource needs and supply chain adequacy but cannot predict whether there will be material supply chain shortages in the future.

While the total expected impact of COVID-19 on future sales is currently unknown, APS experienced higher electric residential sales and lower electric commercial and industrial sales from the outset of the pandemic through April 2021.Beginning in May 2021, electric sales from commercial and industrial customers increased to levels in line with pre-COVID-19 sales but residential sales continued to be higher than pre-COVID-19 sales. Based on past experience, a 1% variation in our annual residential and small commercial and industrial kWh sales projections under normal business conditions can result in increases or decreases in annual net income of approximately $20 million, and a 1% variation in our annual large commercial and industrial kWh sales projections under normal business conditions can result in increases or decreases in annual net income of approximately $5 million.

The Coronavirus Aid, Relief, and Economic Security (“CARES”) Act allowed employers to defer payments of the employer share of Social Security payroll taxes that would have otherwise been owed from March 27, 2020, through December 31, 2020.We deferred the cash payment of the employer’s portion of Social Security payroll taxes for the period July 1, 2020, through December 31, 2020, which was approximately $18 million. As of December 31, 2022, we have paid this cash deferral in full.

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Due to COVID-19, APS voluntarily suspended disconnections of customers for nonpayment beginning March 13, 2020 until December 31, 2020. The suspension of disconnection of customers for nonpayment ended on January 1, 2021, and customers were automatically placed on eight-month payment arrangements if they had past due balances at the end of the disconnection period of $75 or greater. APS voluntarily began waiving late payment fees of its customers on March 13, 2020. Effective February 1, 2023, late payment fees for residential customers were reinstated, and late payment fees for commercial and industrial customers were reinstated effective May 1, 2022. See Note 3 for additional information regarding the Summer Disconnection Moratorium.

More detailed discussion of the impacts and future uncertainties related to COVID‑19 can be found throughout this Management’s Discussion and Analysis of Financial Condition and Results of Operations and the Combined Notes to Pinnacle West’s and APS’s financial statements that appear in Part II, Item 8 of this report and “Risk Factors” in Part I, Item 1A of this report.

Strategic Overview

Our strategy is to deliver shareholder value by creating a sustainable energy future for Arizona by serving our customers with a clean, affordable, reliable, and customer-focused plan.

affordable energy.

Clean Energy Commitment


We are committed to doing our part to make the future clean and carbon-free. As Arizona stewards, we do what is right for the people and prosperity of Arizona.Our vision is to create a sustainable energy future for APSArizona through providing clean, affordable, and Arizona presents an opportunity to engagereliable energy.We can accomplish our visions through collaboration with customers, to achievecommunities, employees, policymakers, shareholders, and other stakeholders. Our clean energy goals. Guided bygoal is based on sound science our approach is intended to encourage market-based and innovative solutions to drive towards a low-carbon economy. We believe clean energy can power a robust economy.supports continued growth and economic development while maintaining reliability and affordable prices for APS’s customers.

APS's newAPS’s clean energy goals consist of three parts:
An aspirationala 2050 goal to provide 100% clean, carbon-free electricity;
Aa 2030 target of achieving a resource mix that is 65% clean energy, with 45% of the generation portfolio coming from renewable energy; and
Aa commitment to end APS’s use of coal-fired generation by 2031.

APS'sAPS’s ability to successfully execute its clean energy commitment is dependent upon a number of important external factors, some of which include a supportive regulatory environment, sales and customer growth, development of clean energy technologies and continued access to capital markets.


2050 Aspirational Goal: 100% Clean, Carbon-Free Electricity. Achieving a fully clean, carbon-free energy mix by 2050 is our aspiration. The 2050 goal will involve new thinking and depends on improved and new technologies.

2030 Goal: 65% Clean Electricity.Energy. APS has an energy mix that is already 50% clean with existing plans to add more renewables and energy storage before 2025. ThoseBy building on those plans, are intended to allow usAPS intends to attain an energy mix that is 65% clean by 2030, with 45% of APS'sAPS’s generation portfolio coming from renewable energy. “Clean” is measured as percent of energy mix which includes all carbon-free resources like nuclear, renewables, and demand-side management. “Renewable” energy includes generation sources such as solar, wind, and biomass, and is measured in accordance with the ACC’s Renewable Energy
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Standard as a percentage of retail sales. This target will serve as a checkpoint for our resource planning, investment strategy, and customer affordability efforts as APS moves toward 100% clean, carbon-free energy mix by 2050.

2031 Goal: End APS'sAPS’s Use of Coal-Fired Generation. The commitment to end APS'sAPS’s use of coal-fired generation by 2031 will require APS to cease buyinguse of coal-generation fromat Four Corners.APS has permanently retired more than 1,000 MW of coal-fired electric generating capacity. These closures and other measures taken by APS have resulted in a total reduction of carbon emissions of 28%33% since 2005. In addition, APS has committed to end the use of coal at its remaining Cholla units by 2025.

APS understands that the transition away from coal-fired power plants toward a clean energy future will pose unique economic challenges for the communities around these plants. We worked collaboratively with stakeholders and leaders of the Navajo Nation to consider the impacts of ceasing operation of APS coal-fired power plants on the communities surrounding those facilities to propose a comprehensive Coal Community Transition (“CCT”) plan. The proposed framework provided substantial financial and economic development support to build new economic opportunities and addresses a transition strategy for plant employees. We are committed to continuing our long-running partnership with the Navajo Nation in other areas as well, including expanding electrification and developing tribal renewable energy projects. Our proposed CCT plan supported the Navajo Nation, where Four Corners is located, the communities surrounding the Cholla Power Plant and the Hopi Tribe, which was impacted by closure of the Navajo Plant. On November 2, 2021, the ACC approved an amended 2019 Rate Case ROO that will require (i) equal payments over a three-year period that total $10 million to the Navajo Nation, (ii) a $1 million one-time payment to the Hopi Tribe within 60 days of the 2019 Rate Case decision, (iii) a $500,000 one-time payment to the Navajo County communities within 60 days of the 2019 Rate Case decision, (iv) up to $1.25 million for electrification of homes and businesses on the Hopi reservation, and (v) up to $1.25 million for the electrification of homes and businesses on the Navajo Nation reservation. The payments and expenditures are attributable to the future closures of Four Corners and Cholla, along with the prior closure of the Navajo Plant. All ordered payments and expenditures would be recoverable through rates. See Note 3 for a discussion of the CCT plan.

Consistent with the 2019 Rate Case decision, as of April 2022, APS has completed the following payments that will be recoverable through rates related to the CCT: (i) $3.33 million to the Navajo Nation; (ii) $0.5 million to the Navajo County communities; and (iii) $1 million to the Hopi Tribe. Consistent with APS’s commitment to the impacted communities, APS has also completed the following payments: (i) $0.5 million to the Navajo Nation for CCT; (ii) $1.1 million to the Navajo County Communities for CCT and economic development; and (iii) $1.25 million to the Hopi Tribe for CCT and economic development. The ACC has also authorized $1.25 million to be recovered through rates for electrification of homes and businesses on both the Navajo Nation and Hopi reservation. Expenditure of the recoverable funds for electrification of homes and businesses on the Navajo Nation and the Hopi reservations is contingent upon completion of a census of the unelectrified homes and businesses in each that are also within APS service territory.

On September 28, 2022, ACC Staff filed their staff report in the Matter of Impact of the Closures of Fossil-Based Generation Plan on Impacted Communities. APS and other interested parties filed comments on the report. On October 21, 2022, ACC Staff filed a revised report and proposed order. The revised report and proposed order recommended that funds for CCT shall not be collected from rate payers. On December 8, 2022, the ACC voted against ACC Staff’s proposed order. APS cannot predict if the ACC will take any further action on this matter.

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In June 2021, APS and the owners of Four Corners entered into an agreement that would allow Four Corners to operate seasonally at the election of the owners beginning in fall 2023, subject to the necessary governmental approvals and conditions associated with changes in plant ownership. Under seasonal operation, one generating unit would be shut down during seasons where electricity demand is reduced, such as the winter and spring. The other unit would remain online year-round, subject to market conditions as well as planned maintenance outages and unplanned outages. APS anticipates that it will elect not to begin seasonal operation in November 2023, unless market conditions change.

Renewables. APS’s IRP (see Note 3 for additional information) establishes the path to meeting our clean energy commitment and maintaining reliable electric service for our customers. APS intends to strengthen its already diverse energy mix by increasing its investments in carbon-free resources. Our IRP rapidly adds clean energy and storage resources while maintaining reliable and affordable service. Its near-term actions includeare focused on clean energy and positive customer outcomes and includes: (a) competitive solicitations to procure clean energy resources such as solar, wind, energy storage, demand response and DSM resources, including energy efficiency resources that enable renewable additions andall of which lead to a cleaner grid.grid; and (b) strategic, short-term wholesale market purchases from a combination of existing merchant natural gas units, neighboring utility systems, and wholesale market participants that ensure operational reliability.

Palo Verde.APS has a diverse portfolio of existing and planned renewable resources, including solar, wind, geothermal, biomass, and biogas that supports our commitment to clean energy, which is already strengthened by Palo Verde, is the nation’s largest producer of electricity and the largest source of carbon-free, energy. The plant supplies nearly 70% of our clean energy andresource, that provides the foundation for the reliable and affordable service for APS customers. APS’s longer-term clean energy strategy includes pursuing the right mix of purchased power contracts for new facilities, procurement of new facilities to be owned by APS, and the ongoing development of distributed energy resources. This balance will ensure an appropriately diverse portfolio designed to achieve the same operational reliability and customer affordability as APS’s near-term strategies. In addition, APS is actively seeking to include future facility purchase options in its PPAs that will enable investments with greater financial flexibility.

APS uses competitive “All-Source” RFPs to pursue market resources that meet its system needs and offer the best value for customers. APS selects projects based on cost and commercial viability, taking into consideration timing and likelihood of successful contracting and development. Under current market conditions, APS must aggressively contract for resources that can withstand supply chain and other geopolitical pressures. Available projects are guided by IRP timelines and quantities and APS maintains a flexible approach that allows it to optimize system reliability and customer affordability through the RFP process. Agreements for the development and completion of future resources are subject to various conditions, including successful siting, permitting and interconnection of the projects to the electric grid. See “Business of Arizona Public Service Company — Energy Sources and Resource Planning — Current and Future Resources — Renewable Energy Standard — Renewable Energy Portfolio” in Item 1 for details regarding APS’s renewable energy resources.

In September 2019, APS issued an RFP that requested up to 250 MW of wind resources to be in service as soon as possible, but no later than 2022. As a result of this RFP, APS executed a 200 MW PPA for a wind resource that went into service in January 2022. In December 2020, APS issued two additional RFPs: (i) a battery storage RFP for projects to be located at two AZ Sun sites; and (ii) an all source RFP that solicited resources to meet our clean energy needs and capacity to maintain system reliability, and that was later amended to include a request for 150 MW of solar resources to be developed on APS property and owned by APS. As a result of the December 2020 RFPs, APS executed two solar plus storage PPAs totaling 275 combined MW, a PPA for a 238 MW wind resource, two energy storage PPAs for a combined 300 MW, extended an existing natural gas tolling agreement and also executed an engineering,
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procurement, and construction contract in November 2021 for a 150 MW solar resource to be owned by APS and in service in early 2023.

In May 2022, APS issued an RFP to address resource needs for 2025 and beyond. The 2022 RFP solicits competitive proposals for approximately 1,000 MW to 1,500 MW of resources, including up to 600 MW to 800 MW of renewable resources to meet the needs of 2025 and 2026 while considering resources that can be online as late as 2027. The 2022 RFP stopped accepting bids on July 15, 2022, and APS sent notifications to shortlisted bidders on September 23, 2022. As a result of the 2022 RFP, and as of December 31, 2022, APS has signed a PPA for 300 MW of solar plus energy storage resources and a PPA for 216 MW of wind resources. Once it secures those important resources and closes out the 2022 RFP, APS intends to issue its next RFP to address future resource needs.

Energy Storage. APS deploys a number of advanced technologies on its system, including energy storage. Energy storage provides capacity, improves power quality, can be utilized for system regulation and, in certain circumstances, be used to defer certain traditional infrastructure investments. Energy storage also aids in integrating renewable generation by storing excess energy when system demand is low and renewable production is high and then releasing the stored energy during peak demand hours later in the day and after sunset. APS is utilizing grid-scale energy storage projects to meet customer reliability requirements, increase renewable utilization, and further our understanding of how storage works with other advanced technologies and the grid.

In 2018, APS issued RFP for approximately 106 MW of energy storage to be located at up to five of its AZ Sun sites.Based upon its evaluation of the RFP responses, APS decided to expand the initial phase of battery deployment to 141 MW by adding a sixth AZ Sun site.These battery storage facilities are currently expected to be in service during the first quarter of 2023.On August 2, 2021, APS executed a contract for an additional 60 MW of utility-owned energy storage to be located on APS’s AZ Sun sites.This contract, with a 2023 in-service date, will complete the addition of storage on current APS-owned utility-scale solar facilities.

Additionally, in February 2019, APS signed two 20-year PPAs for energy storage totaling 150 MW.These PPAs were subject to ACC approval in order to allow for cost recovery through the PSA.APS received the requested ACC approval on January 12, 2021, and service under the agreements is expected to begin in 2023.
As a result of its December 2020 RFPs, APS executed four 20-year PPAs for resources that include energy storage:(a) two PPAs for standalone energy storage resources totaling 300 MW; and (b) two PPAs for solar plus energy storage resources totaling 275 MW. The PPAs are also subject to ACC approval to enable cost recovery through the PSA. APS received the requested ACC approval for three out of four of the projects on December 16, 2021 and on April 13, 2022 for the remaining project. Service under the agreements is expected to begin in 2023 and 2024.

Following the 2022 RFP, as of January 2023, APS has executed a 20-year PPA for solar plus storage resources totaling 300 MW. The PPA is subject to ACC approval to enable cost recovery through the PSA, which was requested in December 2022 and approved in February 2023. Service under this agreement is expected to begin in 2025.

APS currently plans to install more than 1,200 MW of energy storage by 2025, including the energy storage projects under PPAs and AZ Sun retrofits described above. The remaining energy storage is expected to be made up of resources solicited through current and future RFPs.
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The following table summarizes the resources in APS’s energy storage portfolio that are in operation and under development as of December 31, 2021. Agreements for the development and completion of future resources are subject to various conditions.

Net Capacity in Operation
(MW)
Net Capacity Planned / Under
Development (MW)
APS Owned Energy Storage201
PPAs Energy Storage1,025 
Residential Energy Storage19(a)7
Total Energy Storage Portfolio191,233 
(a)     This includes 18.5 MW of APS customer-owned batteries and 0.2 MW of APS-owned residential batteries.

Palo Verde. Palo Verde, the nation’s largest carbon-free, clean energy resource, will continue to be a foundational part of APS’s resource portfolio. Palo Verde is not just the cornerstone of our current clean energy mix,mix; it also is a significant provider of clean energy to the southwest United States. The plant’splant is a critical asset to the Southwest, generating more than 32 million MWh annually – enough power for roughly 3.4 million households, or approximately 8.5 million people. Its continued operation is important to a carbon-free and clean energy future for Arizona and the region, as a reliable, continuous, affordable resource and as a large contributor to the local economy.

Affordable

Affordable

We believe it is APS's responsibility to deliver electric services to customers in the most cost-effective manner. Since January 2018, the average residential bill decreased by 7.8% or $11.68, due primarily to savings from lower operating costs in areas such as fuel and purchased power and federal tax reform that have been passed on to customers.

Building upon existing cost management efforts, APS launched a customer affordability initiative in 2019. The initiative was implemented company-wide to thoughtfully and deliberately assess our business processes and organizational approaches to completing high-value work and eliminating waste. Through theachieving internal efficiencies. APS continues to drive this initiative by identifying opportunities to streamline its business processes to assist in mitigating cost increases, increasing employee retention, and existing cost management practices, APS identified $20 million in possible cost savings for 2020.improving customer satisfaction.

Participation in the EIM continues to be an effectivea tool for creating savings for ourAPS’s customers from the real-time, voluntary market. OverAPS continues to expect that its participation in EIM will lower its fuel and purchased-power costs, improve situational awareness for system operations in the past three years,Western Interconnection power grid, and improve integration of APS’s renewable resources. APS continues to evaluate opportunities that benefit our customers and is exploring opportunities to move to a day-ahead market with the EIM has delivered approximately $140 million in gross benefits toexpectation of reliably achieving incrementally greater cost savings and using the region’s increasing renewable resources more efficiently. As part of that effort, APS customers.is exploring several options. APS is in discussions with the current EIM operator, the CAISO, the Western Resource Adequacy Program, the Western Markets Exploratory Group, and the Southwest Power Pool. Each of these explorations also involve other EIM participants aboutentities and are being undertaken to evaluate the feasibility and cost/benefit of creating a voluntary day-ahead market to achieve more cost savings and use the region’s renewable resources more efficiently.


market.
Reliable
Reliable

While our energy mix evolves, the obligation to deliver reliable service to our customers remains. Excluding voluntary outages and proactive fire mitigation efforts, APS finished 2019 with its best score for frequencyis managing through significant growth in the Phoenix metropolitan area while experiencing supply chain issues similar to other industries.
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Planned investments will support operating and maintaining the grid, updating technology, accommodating customer growth, and enabling more renewable energy resources. Our advanced distribution management system allows operators to locate outages, control line devices remotely and helps them coordinate more closely with field crews to safely maintain an increasingly dynamic grid. The system also integrates a new meter data management system that increases grid visibility and gives customers access to more of their energy usage data. (See "Liquidity and Capital Resources - Capital Expenditures" below for additional details on capital expenditures.)

Wildfire safety remains a critical focus for APS and other utilities. We increased investment in fire mitigation efforts to clear defensible space around our infrastructure, continue ongoing system upgrades, build partnerships with government entities and first responders and educate customers and communities. These programs contribute to customer reliability, responsible forest management and safe communities.

The new units at our modernized Ocotillo power plantPower Plant provide cleaner-running and more efficient units. They support reliability by responding quickly to the variability of solar generation and delivering energy in the late afternoon and early evening when solar production declines as the sun sets and customer demand peaks.

APS continues to evaluate options to meet growing energy demand and ensure grid reliability, including through upgrades to and/or modernization of additional existing gas facilities.
Customer-Focused

Customers are atIn October of 2021, APS announced plans to evaluate regional market solutions as part of the coreinformal Western Markets Exploratory Group (“WMEG”). As part of what APS does every day andWMEG, APS is committedexploring the potential for a staged approach to providing optionsnew market services, including day-ahead energy sales, transmission system expansion, and other power supply and grid solutions consistent with existing state regulations. WMEG hopes to identify market solutions that makecan help achieve carbon reduction goals while supporting reliable, affordable service for customers. APS is unable to predict the outcome of these discussions.

APS’s key elements to delivering reliable power include resource planning, sufficient reserve margins, customer partnerships to manage peak demand, fire mitigation, and operational preparedness. Seasonal readiness procedures at APS also include walkdowns to ensure good material conditions and critical control system surveys. APS also plans for the unexpected by conducting emergency operations drills and coordinating on fire and emergency management with federal, state, and local agencies.

Customer-Focused

Recognizing that creating customer value is inextricably linked to increasing shareholder value, APS’s focus remains on its customers and the communities it easierserves. Accordingly, it is APS’s goal to achieve an industry-leading, best-in-class customer experience, while demonstrating compassion and advocacy for its customers. This multi-year objective includes incrementally improving APS’s J.D. Power (“JDP”) overall customer satisfaction ratings from the fourth quartile to the first quartile of its peer set comprised of large investor-owned utilities. APS made progress on that front in 2022.

As previously disclosed, APS’s JDP Residential rankings for overall customer satisfaction rating improved in 2020 and 2021. That improvement trend continued with the JDP Residential 2022 year-end results. Compared to 2021, APS made quartile gains in every single driver of residential customer satisfaction, firmly lifting APS into the second quartile nationally. Consequently, overall residential satisfaction is now above industry benchmarks when compared to APS’s large investor-owned peers. APS’s strongest performing drivers for the year were Customer Care (phone and digital), Power Quality and Reliability, Corporate Citizenship, and Billing & Payment. Additionally, the JDP Business 2022 full-year results place APS in the top – or first – quartile of utilities nationally for business customers. As a
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result, APS is among the most improved utilities in the nation for both residential and business customer satisfaction.

In mid-2021, APS initiated an organization-wide customer experience strategy council designed to further drive a customer-oriented culture and improve customer satisfaction. Through this and other on-going customer-centric initiatives, APS has embraced increased empathy training for care center associates and adopted more flexible payment arrangements for customers. Numerous customer web-based enhancements also were implemented, including streamlined navigation and Spanish language transaction capabilities on aps.com; an enhanced online power outage center; and enrollment of more than 1 million customers for outage email and text notifications. Additionally, APS launched a broad-reaching multi-channel communications campaign focused on messages that matter most to APS’s customers – reliability, energy-efficiency, financial assistance, the environment, and programs that enable customers to do business with them. In 2019, APS launched its redesigned aps.com website and mobile app, giving customers upgraded access todesign their own personalized energy usage data and billing information. APS's Customer Care team is using speech analytics to enrich advisors’ interactions with customers over the telephone, and customers can also communicate with APS through an online chat.experience.

APS expanded financialoffers assistance programs that provide discounts to qualified limited-income customers, as well as programs to help for itscustomers stay current on their bills. And, to ensure our most vulnerable customers are connected to these programs, we train and work with more than 100 community action agencies. APS’s Energy Support program gives qualified limited-income customers a 25% discount on their bill each month. Additionally, qualified customers experiencing an unplanned major expense or an unexpected reduction in 2019, allocating $2.75income can receive up to $800 a year to cover current or past due APS bills through the Crisis Bill Assistance program. Making customers aware of the assistance programs and resources available to them is a top priority for APS, and we have significantly increased the level of marketing and customer outreach through various campaigns and communication channels. As of December 31, 2022, approximately 60,000 customers received an aggregate of about $29.6 million in crisis bill assistance and increasingfrom various sources, with the individual benefit for qualifying customerslargest amount coming from $400 to $800 per year. The APS Solar Communities program has allowed more than 600 limited- and moderate-income customers to support clean energy and save money by hosting APS-owned solar systemsthe Arizona Department of Economic Security’s Emergency Rental Assistance Program. This assistance is on their residences in exchange for a monthly bill credit.

APS continues to develop and deploy innovative programs that connect customers with advanced technologies to help them manage their bills and encourage energy use during midday, when solar power is most abundant. Three energy storage programs incorporating smart thermostats, connected water heaters and batteries are helping customers shift energy use to times when they can take advantage of low-cost, abundant energy and reduce peak demand on APS's system.

In 2020, APS is convening an advisory panel of customers to gain a deeper understandingtop of the customer experience through their individual perspectives. A groupapproximately $33 million of customer service advisors, in conjunction with local human services agencies, will provide in-person customer support in communities APS serves.


Emerging Technologies

Energy Storage

APS deploys a number of advanced technologies on its system, including energy storage. Storage can provide capacity, improve power quality, be utilized for system regulation, integrate renewable generation, and in certain circumstances, be useddiscounts provided to defer certain traditional infrastructure investments. Energy storage can also aid in integrating higher levels of renewables by storing excess energy when system demand is low and renewable production is high and then releasing the stored energy during peak demand hours later in the day and after sunset. APS is utilizing grid-scale energy storage projects to benefiteligible customers to increase renewable utilization, and to further our understanding of how storage works with other advanced technologies and the grid. We are preparing for additional energy storage in the future.

In early 2018, APS entered into a 15-year power purchase agreement for a 65 MW solar facility that charges a 50 MW solar-fueled battery. Service under this agreement is scheduled to begin in 2021. In 2018, APS issued a request for proposal for approximately 106 MW of energy storage to be located at up to five of its AZ Sun sites. Based upon our evaluation of the RFP responses, APS decided to expand the initial phase of battery deployment to 141 MW by adding a sixth AZ Sun site. In February 2019, we contracted for the 141 MW and originally anticipated such facilities could be in service by mid-2020. In April 2019, a battery module in APS’s McMicken battery energy storage facility experienced an equipment failure, which prompted an internal investigation to determine the cause. The results of the investigation will inform the timing of our utilization and implementation of batteries on our system. Due to the April 2019 event, APS is working with the counterparty for the AZ Sun sites to determine appropriate timing and path forward for such facilities. Additionally, in February 2019, APS signed two 20-year power purchase agreements for energy storage totaling 150 MW. Service under these power purchase agreements is also dependent on the results of the McMicken battery incident investigation and requires approval from the ACC to allow for recovery of these agreements through the PSA.APS Energy Support Program.

We currently plan to install at least 850 MW of energy storage by 2025, includingA consumer working group and a customer advisory board were formed in 2020 – the 150 MW of energy storage projects under power purchase agreements described above.  The additional 700 MW of APS-owned energy storage is expected to beformer made up of stakeholders and advocates representing various customer interests, and the retrofits associatedlatter comprised of a cross-section of customers. APS meets monthly with the consumer working group to obtain feedback on customer-related initiatives. Topics in 2022 ranged from TOU implementation, bill redesign, aps.com, customer assistance and customer care center performance. APS also met with the customer advisory board in 2022 to keep apprised of customer needs, wants and perspectives on a variety of topics, including rate plan selection, billing and payment alerts, value for price insights and outage experience. The customer advisory board’s input helped shape customer communications, as well as our AZ Sun sites as described above, along with current and future RFPs for energy storage and solar plus energy storage projects. Giventhinking on related program development. In September 2022, APS completed the April 2019 event, we continuetransition to evaluatenew 4 p.m. to 7 p.m. on-peak TOU hours. More than one million residential customer meters were reprogrammed to the appropriate timing and path forward to support the overall capacity goals for our system and associated energy storage requirements. Currently, APS is pursuing an RFP for battery-ready solar resources up to 150 MW with results expected in the first half of 2020.new on-peak hours.

Developing Clean Energy Technologies

Electric Vehicles

APS plans to makeis making electric vehicle charging more accessible for its customers and helphelping Arizona businesses, schools and governments electrify their fleets. In 2019,2021, APS implementedcontinued its expansion of its Take Charge AZ Pilot Program. As of December 31, 2022, APS had installed 668 Level 2 (“L2”) charging ports at customer locations, with more stations expected to be added through 2023. The program provides
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charging equipment, installation, and maintenance to business customers, government agencies, non-profits, and multifamily housing communities. RatesIn addition to the L2 charging stations, APS has deployed DC fast charging (“DCFC”) stations that are designedowned and operated by APS at five locations in Arizona. The first location opened for public use in March 2022 in Show Low, Arizona. The other four projects in Sedona, Prescott, Globe, and Payson were energized by the end of 2022. Each location features 2-150 kilowatt and 2-350 kilowatt DCFC ports. Charging at these stations will be accessible through the Electrify America charging network. APS has a goal to encouragereach 450,000 light-duty electric vehicles in its service territory by 2030.

Additionally, as part of APS’s DSM Plan, APS has launched an Electric Vehicle Charging Demand Management Pilot Program to proactively address the growing electric demand from electric vehicle charging overnightas electric vehicles become more widely adopted. This program includes the APS SmartCharge data gathering program, a $250 residential electric vehicle smart charger rebate for qualifying electric vehicle chargers, Fleet Advisory Services, and during daytime off-peak hours when solar energya $100 rebate to home builders for new homes to be built EV ready with 240V charging station garage outlets. APS filed its 2023 DSM Plan on November 30, 2022, which proposes two new programs, an expanded residential EV Managed Charging Program and a Commercial Make-Ready Program. The Commercial Make-Ready Program is abundant.

intended to help reduce some of the high upfront cost for our customers installing DCFC stations, and enables APS to deploy effective load management strategies at these commercial sites.

The ACC ordered certain public service corporations, including APS, to develop a long-term, comprehensive statewide transportation electrification plan (“TE Plan”) for Arizona. The statewide TE Plan is intended to provide a roadmap for transportation electrification in Arizona, focused on realizing the associated air quality and economic development benefits for all residents in the state along with understanding the impact of electric vehicle charging on the grid. APS actively participated in the development of that plan, which was approved by the ACC in December 2021. In the decision, the ACC also ordered APS and another large Arizona electric public service corporation to each develop and submit for ACC approval their own TE Plans and corresponding budget for 2023. Accordingly, APS met its compliance obligation and filed both a 2023 TE Plan on June 1, 2022 and a supplemental TE Plan on November 30, 2022. APS will file its required TE progress reports on March 15 and September 15, 2023, along with a 2024 TE Plan later this year.

Hydrogen Production
Palo Verde,
APS, in partnership with Idaho National Laboratory (“INL”), Energy Harbor Corporation (“Energy Harbor”), and two other utilities, has beenXcel Energy Incorporated (“Xcel”), was chosen by the DOE'sDOE’s Office of Nuclear Energy to participate in a series of hydrogen production projectprojects with the goal to improve the long-term economic competitiveness of the nuclear power industry. The project, planned formulti-phase projects began in 2020 through 2022, will lookwith a series of small-scale hydrogen production demonstration projects led by Energy Harbor and Xcel, as well as a technical and economic assessment performed by INL of using electricity generated at how hydrogenPalo Verde to produce hydrogen.

Based on the experience from Palo Verde may be usedVerde’s utility partners’ small scale demonstration projects and from the Palo Verde-specific technical and economic assessment performed by INL, in April 2021, PNW Hydrogen LLC (“PNW Hydrogen”), a newly formed subsidiary of Pinnacle West, applied for DOE funding for a larger scale hydrogen production demonstration project using electricity sourced from Palo Verde. On October 7, 2021, PNW Hydrogen was notified that DOE’s Office of Energy Efficiency & Renewable Energy and Office of Nuclear Energy had selected PNW Hydrogen’s application for an award of $20 million in federal funding to support the hydrogen production demonstration project, subject to
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negotiation and execution of a definitive Cooperative Agreement funding instrument between PNW Hydrogen and DOE. PNW Hydrogen continues to work through negotiations with DOE, while also investigating how best to coordinate its efforts with the Southwest Clean Hydrogen Innovation Network (“SHINe”) regional hub on development opportunities.

SHINe Regional Hub.The Infrastructure Investment and Jobs Act (“IIJA”), also known as energy storagethe Bipartisan Infrastructure Bill, was signed into law on November 15, 2021. Among other things, the IIJA included money for use in reverse-operable electrolysis or peaking gas turbines during timesregional clean hydrogen hubs, and on February 15, 2022, the Department of Energy DOE announced a Request for Information to collect feedback from stakeholders to inform the implementation and design of the day when photovoltaic solarregional hubs.

On May 12, 2022, APS, along with three other Arizona energy sources are

unavailableproviders and energy reservesthe State’s three public universities announced the formation of a new, interdisciplinary coalition, called the Arizona Center for a Carbon Neutral Economy (“AzCaNE”), with the goal of attaining a carbon neutral economy in Arizona. AzCaNE’s first action was to pursue the southwest United States are low. It could also be usedcreation of an Arizona-led approach to support a rapidly increasingsecuring regional clean hydrogen transportation fuel market.

Experiencehub funding. Leading professionals from the pilot project will offer insights into methodsseven founding participants, along with representatives of Arizona, the Navajo Nation and companies working to develop a hydrogen ecosystem within Arizona make up the Governance Committee for flexible transitions between electricityAzCaNE’s current efforts.

On September 22, 2022, the DOE opened applications for the up to $7 billion program to create six to ten regional clean hydrogen hubs across the country. Concept papers for each regional hub were due by November 7, 2022, and hydrogen generation missions in solar-dominated electricity markets, and demonstrate how hydrogen may be used as energy storageAzCaNE submitted a concept paper for the SHINe regional hub. On December 27, 2022, the SHINe regional hub was one of thirty-three regional hubs encouraged to provide electricity during operating periods when solar is not available.

submit a full application by the DOE. Full applications are due by April 7, 2023.

Carbon Capture

Carbon capture technologies can isolate atmospheric CO2 and either sequester it permanently in geologic formations or convert it for use in products. Currently, almost all existing fossil fuel generators do not control carbon emissions the way they control emissions of other air pollutants such as sulfur dioxide or oxides of nitrogen. At the same time, these generators are dispatchable: they can supply energy quickly as needed for reliability. Carbon capture technologies are still in the demonstration phase and while they show promise, they are still being tested in real-world conditions. These technologies could offer the potential to keep in operation existing generators that otherwise would need to be retired. There are a number of demonstration projects that show promise but are still being tested in real-world conditions. APS will continue to monitor this emerging technology.

Environmental, Social, and Governance (ESG) Practices

Pinnacle West has been integrating ESG practices into its core work for almost 30 years. As a business strategy, we seek solutions that provide “shared value,” meaning solutions that address societal and environmental challenges in a way that also delivers business value. Our commitment extends beyond implementing sustainability practices; we are dedicated to working with our stakeholders to identify and address the sustainability issues that we are uniquely positioned to impact through our business. In 2020, in support of our clean energy commitment and the growing focus on ESG within our organization, we increased our efforts by dedicating a new Sustainability Department at Pinnacle West to integrating ESG best practices into the everyday work of the Company.

As a first step, the Company engaged the Electric Power Research Institute (“EPRI”) and leveraged input from employees, large customers, limited-income advocates, economic development groups, environmental non-governmental organizations, leading sustainability academics and other stakeholders to
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identify and assess the sustainability issues that matter most. In total, 23 Priority Sustainability Issues (“PSIs”) were identified and prioritized. The most critical category, Integral Shared Value, includes four issues deemed most important and most able to be impacted by our actions: clean energy, customer experience, energy access and reliability and safety and health. These Integral PSIs provide the foundation for informing our strategic direction, creating a framework for incorporating best practices and driving enterprise-wide alignment and accountability. In 2021, the Company engaged EPRI for the second phase of this work, focused on benchmarking best practices within these four Integral Shared Value PSIs. We utilized the benchmarking information to identify opportunities for further improvement in our ESG performance.

In 2021, the Company established a Social Issues Committee Framework. The goal of the framework is to provide a process for considering emergent social issues, and for determining whether or how best to engage. The committee’s responsibility is to determine, using a set of principles grounded in the APS Promise and the PSIs, whether engagement on specific emergent social issues is appropriate and, if so, how best to engage.

The Company also finalized an ESG Strategic Framework to guide our work. The framework is based upon three foundational pillars: ESG Policy Advocacy (we advocate for policy that supports our clean energy goals); Driving Performance (improving our ESG performance in the most important areas, including our PSIs); and effectively communicating and amplifying our ESG story to our various stakeholders, including investors, customers, employees and beyond. Throughout 2022, the ESG Strategic Framework has guided our ESG activities allowing the Sustainability Department to prioritize projects and collaborate with our teams in the Company. Also in 2022, the Company developed an ESG Narrative, aligned to the APS Promise, to guide the Company’s communications strategy internally and externally to customers to effectively share APS’s sustainability story.

Regulatory Overview

On October 31, 2019, 2022 Retail Rate Case

APS filed an application with the ACC foron October 28, 2022 (the “2022 Rate Case”) seeking an annual increase in annual retail base rates on the date rates become effective (“Day 1”) of $69a net $460 million. This amount includesDay 1 net impact represents a total base revenue deficiency of $772 million offset by proposed adjustor transfers of cost recovery of the deferralto annual retail rates and rate base effects of the Four Corners SCR project that is currently the subject of a separate proceeding (see “SCR Cost Recovery” in Note 4). It also reflects a net credit to base rates of approximately $115 million primarily due to the prospective inclusion of rate refunds currently provided through the TEAM. The proposed total revenue increase in APS's application is $184 million.adjustor mechanism modifications. The average annual customer bill impact of APS’s request on Day 1 is an increase of 5.6% (the average annual bill impact for a typical APS residential customer is 5.4%)13.6%.

The principal provisions of APS'sAPS’s application are:

a test year comprised of twelve12 months ended June 30, 2019,2022, adjusted as described below;
an original cost rate base of $8.87$10.5 billion, which approximates the ACC-jurisdictional portion of the book value of utility assets, net of accumulated depreciation and other credits;
the following proposed capital structure and costs of capital:
 Capital Structure Cost of Capital   Capital Structure Cost of Capital 
Long-term debtLong-term debt 45.3%4.10%Long-term debt 48.07 %3.85%
Common stock equityCommon stock equity 54.7%10.15%Common stock equity 51.93 %10.25 %
Weighted-average cost of capitalWeighted-average cost of capital   7.41%Weighted-average cost of capital   7.17 %
 
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a 1% return on the increment of fair value rate base above APS’s original cost rate base, as provided for by Arizona law;
authorizationa rate of $0.038321 per kWh for the portion of APS’s retail base rates attributable to defer until APS's next generalfuel and purchased power costs;
modification of its adjustment mechanisms including:
eliminate the Environmental Improvement Surcharge and collect costs through base rates,
eliminate the Lost Fixed Cost Recovery mechanism and collect costs through base rates and the Demand Side Management Adjustment Charge (“DSMAC”),
maintain as inactive the Tax Expense Adjustor Mechanism,
maintain the Transmission Cost Adjustment mechanism,
modify the performance incentive in the DSMAC, and
modify the Renewable Energy Adjustment Charge to include recovery of capital carrying costs of APS owned renewable and storage resources;
changes to its limited-income program, including a second tier to provide an additional discount for customers with greater need; and
twelve months of post-test year plant to reflect used and useful projects that will be placed into service prior to July 1, 2023.

APS requested that the increase become effective December 1, 2023. The hearing for this rate case is currently scheduled to begin in August 2023. APS cannot predict the outcome of its request.

2019 Retail Rate Case

On October 31, 2019, APS filed an application with the ACC (the “2019 Rate Case”) seeking an increase or decrease in its Arizona property taxes attributableannual retail base rates. On August 2, 2021, the Administrative Law Judge issued a Recommended Opinion and Order in the 2019 Rate Case (the “2019 Rate Case ROO”) and issued corrections on September 10 and September 20, 2021. See Note 3 for information regarding the 2019 Rate Case ROO.

On October 6, 2021 and October 27, 2021, the ACC voted on various amendments to tax rate changes after the date2019 Rate Case ROO that would result in, among other things, (i) a return on equity of 8.70%, (ii) the rate application is adjudicated;
a number of proposed rate and program changes for residential customers, including:
a super off-peak period during the winter months for APS’s time-of-use with demand rates;
additional $1.25 million in funding for limited-income crisis bill program; and
a flat bill/subscription rate pilot program;
proposed rate design changes for commercial customers, including an experimental program designed to provide access to market pricing for up to 200 MW of medium and large commercial customers;

recovery of the deferral and rate base effects of the construction and operating costs and construction of the Ocotillo modernizationFour Corners SCR project, with the exception of $215.5 million (see Note 4 discussion“Four Corners SCR Cost Recovery” below), (iii) that the CCT plan include the following components: (a) a payment of $1 million to the Hopi Tribe within 60 days of the 2017 Settlement Agreement); and
continued recovery2019 Rate Case decision, (b) a payment of $10 million over three years to the Navajo Nation, (c) a payment of $0.5 million to the Navajo County communities within 60 days of the remaining investment2019 Rate Case decision, (d) up to $1.25 million for electrification of homes and other costs relatedbusinesses on the Hopi reservation, and (e) up to $1.25 million for the electrification of homes and businesses on the Navajo Nation reservation. These payments and expenditures are attributable to the retirementfuture closures of Four Corners and Cholla, along with the prior closure of the Navajo Plant and all ordered payments and expenditures would be recoverable through rates, and (iv) a change in the residential on-peak time-of-use period from 3 p.m. to 8 p.m. to 4 p.m. to 7 p.m. Monday through Friday, excluding holidays. The 2019 Rate Case ROO, as amended, results in a total annual revenue decrease for APS of $4.8 million, excluding temporary CCT payments and expenditures. On November 2, 2021, the ACC approved the 2019 Rate Case ROO, as amended. On November 24, 2021, APS filed an application for rehearing of the 2019 Rate Case with the ACC and the application was deemed denied on December 15, 2021, as the ACC did not act upon it. On December 17, 2021, APS filed its Notice of Direct Appeal at the Arizona Court of Appeals and a Petition for Special Action with the Arizona Supreme Court, requesting review of the disallowance of $215.5 million of Four
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Corners SCR plant investments and deferrals (see Note 4“Four Corners SCR Cost Recovery” below for details relatedadditional information) and the 20 basis point penalty reduction to the resulting regulatory asset).

APS requested thatreturn on equity. On February 8, 2022, the increase become effective December 1, 2020.Arizona Supreme Court declined to accept jurisdiction on APS’s Petition for Special Action. The Arizona Court of Appeals heard oral arguments on November 30, 2022. The Court took the matter under advisement and will issue its decision in due course. APS cannot predict the outcome of its request.this proceeding.

Consistent with the 2019 Rate Case decision, APS implemented the new rates effective as of December 1, 2021. In addition, the ACC ordered extensive compliance and reporting obligations and will be continuing to explore whether penalties or rebates would be owed to certain customers. APS completed the implementation of the new on-peak hours for residential customers before the September 1, 2022 deadline. APS cannot predict if the ACC will take any further action on this matter.

Additionally, consistent with the 2019 Rate Case decision, as of April 2022, APS has completed the following payments that will be recoverable through rates related to the CCT: (i) $3.33 million to the Navajo Nation; (ii) $0.5 million to the Navajo County communities; and (iii) $1 million to the Hopi Tribe. Consistent with APS’s commitment to the impacted communities, APS has also completed the following payments: (i) $0.5 million to the Navajo Nation for CCT; (ii) $1.1 million to the Navajo County Communities for CCT and economic development; and (iii) $1.25 million to the Hopi Tribe for CCT and economic development. The ACC has also authorized $1.25 million to be recovered through rates for electrification of homes and businesses on both the Navajo Nation and Hopi reservation. Expenditure of the recoverable funds for electrification of homes and businesses on the Navajo Nation and the Hopi reservations is contingent upon completion of a census of the unelectrified homes and businesses in each that are also within APS service territory.

See Note 43 for information regarding additional regulatory matters.

Four Corners SCR Cost Recovery

As part of APS’s 2019 Rate Case, APS included recovery of the deferral and rate base effects of the Four Corners SCR project. On November 2, 2021, the 2019 Rate Case decision was approved by the ACC allowing approximately $194 million of SCR related plant investments and cost deferrals in rate base and to recover, depreciate and amortize in rates based on an end-of-life assumption of July 2031. The decision also included a partial and combined disallowance of $215.5 million on the SCR investments and deferrals. APS believes the SCR plant investments and related SCR cost deferrals were prudently incurred, and on December 17, 2021, APS filed its Notice of Direct Appeal at the Arizona Court of Appeals requesting review of the $215.5 million disallowance. The Arizona Court of Appeals heard oral arguments on November 30, 2022. The Court took the matter under advisement and will issue its decision in due course. Based on the partial recovery of these investments and cost deferrals in current rates and the uncertainty of the outcome of the legal appeals process, APS has not recorded an impairment or write-off relating to the SCR plant investments or deferrals as of December 31, 2022. If the 2019 Rate Case decision to disallow $215.5 million of the SCRs is ultimately upheld, APS will be required to record a charge to its results of operations, net of tax, of approximately $154.4 million. We cannot predict the outcome of the legal challenges nor the timing of when this matter will be resolved. See Note 3 for additional information regarding the Four Corners SCR cost recovery.

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Financial Strength and Flexibility

Pinnacle West and APS currently have ample borrowing capacity under their respective credit facilities and may readily access these facilities ensuring adequate liquidity for each company.  Capital expenditures will be funded with internally generated cash and external financings, which may include issuances of long-term debt and Pinnacle West common stock.

Other Subsidiaries

Bright Canyon Energy. On July 31, 2014, Pinnacle West announced its creation of a wholly-owned subsidiary, BCE.  BCE's focusBCE’s strategy is on new growth opportunitiesto develop, own, operate and acquire energy infrastructure in a manner that leverageleverages the Company’s core expertise in the electric energy industry.  BCE’s first initiative isAs of December 31, 2022, BCE had total assets of approximately $115.3 million.

In 2014, BCE formed a 50/50 joint venture with BHE U.S. Transmission LLC, a subsidiary of Berkshire Hathaway Energy Company.  The joint venture, named TransCanyon, is pursuing independent electric transmission opportunities within the eleven11 U.S. states that comprise the Western Electricity Coordinating Council,Interconnection, excluding opportunities related to transmission service that would otherwise be provided under the tariffs of the retail service territories of the venture partners’ utility affiliates.

On December 20, 2019, BCE acquired minority ownership positions in two wind farms developedunder development by Tenaska Energy, Inc. and Tenaska Energy Holdings, LLC, the 242 MW Clear Creek wind farm in Missouri and the 250 MW Nobles 2 wind farm in Minnesota. Thefarms. Clear Creek achieved commercial operation in May 2020 and Nobles 2 achieved commercial operation in December 2020. Both wind farms deliver power under long-term PPAs. BCE indirectly owns 9.9% of Clear Creek and 5.1% of Nobles 2.

Tenaska Clear Creek Wind, LLC, the developer, owner, and operator of the Clear Creek wind farm, has disputed the proposed cost allocation of system upgrades related to connecting the Clear Creek wind farm to the transmission system and filed a complaint with FERC on May 21, 2021, which was denied on September 9, 2022. Subsequently, Tenaska Clear Creek Wind, LLC filed with FERC a request for rehearing and a motion for stay of the September 9, 2022 order. On October 7, 2022, the request for rehearing was denied by FERC. FERC has not ruled on the motion for stay. Clear Creek has filed a Petition for Review with the U.S. Court of Appeals and Motion for Stay Pending Appeal, both of which are still pending.

Tenaska Clear Creek Wind, LLC filed a second complaint with FERC on May 25, 2022, alleging that the wind farm was being curtailed in a discriminatory manner. The May 25, 2022 Complaint was denied by FERC on December 15, 2022 and Tenaska Clear Creek Wind, LLC requested Rehearing of the denial on January 13, 2023.

Due to the disputed system upgrades and the related curtailment, the Clear Creek wind farm has experienced a significant reduction in power generation that has had a material adverse impact on the project’s ability to generate cash flow for investors. These energy curtailments are expected to persist, unless and until system upgrades are implemented to alleviate the present transmission system congestion, or the disputes are determined in favor of, or settled in a manner favorable to, Tenaska Clear Creek Wind, LLC. As such, during the fourth quarter of 2022, due to these on-going disputes, cost allocation uncertainties, and no probable favorable resolution, BCE determined its equity method investment was fully impaired. Prior to the impairment, the investment had a carrying value of $17.1 million, which has been written-down to reflect the investment’s estimated fair value of zero as of December 31, 2022.
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Pinnacle West’s Consolidated Statement of Income for the year ended December 31, 2022 includes an after-tax loss of $12.8 million relating to this impairment.

BCE has started construction on a microgrid facility in Los Alamitos, California featuring 31 MW of solar, 20 MW of battery storage, and 3 MW of backup generators. Supported by a long-term power purchase agreement with San Diego Gas and Electric Company, Los Alamitos will supply 20 MW of solar and battery storage capacity to the Southern California grid and provide resilient backup power in the event of a grid emergency to the Army and California National Guard at Joint Forces Training Base Los Alamitos. The Los Alamitos project is expectedscheduled to achieve commercial operation in 2020third-quarter 2023. See Note 6 regarding a credit agreement entered into by BCE to finance capital expenditures and deliver powerrelated costs for this microgrid project.

BCE and Ameresco, Inc. jointly own a special purpose entity that is sponsoring the Kūpono Solar project. This project is a 42 MW solar and battery storage facility in Oʻahu, Hawaii that will supply clean renewable energy and capacity under a long-term20-year power purchase agreement.agreement with Hawaiian Electric Company, Inc. The Nobles 2Kūpono Solar project is also expected to achieve commercial operationbe completed in 2020 and deliver power under a long-term power purchase agreement. BCE indirectly owns 9.9% of the Clear Creek project and 5.1% of the Nobles 2 project.2024.

El Dorado. El Dorado is a wholly-owned subsidiary of Pinnacle West.El Dorado owns debt investments and minority interests in several energy-related investments and Arizona community-based ventures. In particular, El Dorado committed to a $25 million investment in the Energy Impact Partners fund, which is an organization that focuses on fostering innovation and supporting the transformation of the utility industry.The investment will be made by El Dorado as investments are selected by the Energy Impact Partners fund.As of December 31, 2022, El Dorado has contributed approximately $12.5 million to the Energy Impact Partners fund.Additionally, El Dorado committed to a $25 million investment in AZ-VC (formerly the invisionAZ Fund), which is a fund focused on analyzing, investing, managing, and otherwise dealing with investments in privately held early stage and emerging growth technology companies and businesses primarily based in the State of Arizona, or based in other jurisdictions and having existing or potential strategic or economic ties to companies or other interests in the State of Arizona. As of December 31, 2022, El Dorado has contributed approximately $2.6 million to AZ-VC. The remainder of the investment will be contributed by El Dorado as investments are selected by AZ-VC.

Key Financial Drivers
 
In addition to the continuing impact of the matters described above, many factors influence our financial results and our future financial outlook, including those listed below.  We closely monitor these factors to plan for the Company’s current needs, and to adjust our expectations, financial budgets, and forecasts appropriately.
 
Electric Operating Revenues.  For the years 20172020 through 2019,2022, retail electric revenues comprised approximately 95%92% of our total operating revenues.  Our electric operating revenues are affected by customer growth or decline, variations in weather from period to period, customer mix, average usage per customer and

the impacts of energy efficiency programs, distributed energy additions, electricity rates and tariffs, the recovery of PSA deferrals and the operation of other recovery mechanisms.  These revenue transactions are affected by the availability of excess generation or other energy resources and wholesale market conditions, including competition, demand, and prices.
 
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Actual and Projected Customer and Sales Growth.��Retail customers in APS’s service territory increased 2.0%2.1% for the year ended December 31, 20192022, compared with the prior year.prior-year period. For the three years 2017 through 2019,2022, APS’s customer growth averaged 1.8%2.2% per year. We currently project annual customer growth to be 1.5 -1.5% to 2.5% for 20202023 and for 2020the average annual growth to be in the range of 1.5% to 2.5% through 20222025 based on our assessment ofanticipated steady economicpopulation growth in Arizona.Arizona during that period.

Retail electricity sales in kWh, adjusted to exclude the effects of weather variations, increased 0.6%2.4% for the year ended December 31, 20192022, compared with the prior year.  Steady economic growth andprior-year period. While steady customer growth werewas offset by energy savings driven by customer conservation, energy efficiency, and distributed renewable generation initiatives.  initiatives, the main drivers of positive sales for this period were a strong improvement in sales to commercial and industrial customers and the ramp-up of new data center customers.

For the three years 2017 through 2019,2022, annual retail electricity sales were about flat,growth averaged 2.5%, adjusted to exclude the effects of weather variations. WeDue to the expected rapid growth of several large data centers and new large manufacturing facilities, we currently project that annual retail electricity sales in kWh will increase in the range of 1.0 - 2.0%3.5% to 5.5% for 20202023 and increase onthat average annual growth will be in the range of 1.0 - 2.0% during 20204.5% to 6.5% through 2022,2025, including the effects of customer conservation, and energy efficiency, and distributed renewable generation initiatives, but excluding the effects of weather variations and excludingvariations. This projected sales growth range includes the impacts of several new large data centers opening operations in Metro Phoenix.  The impact ofand new large data centers could raisemanufacturing facilities, which are expected to contribute to average annual growth in the range of expected sales annual growth rate over the 20203.5% to 2022 period, but demand from these customers remains uncertain at this point. Slower than expected growth of the Arizona economy or acceleration of the expected effects of customer conservation, energy efficiency or distributed renewable generation initiatives could further impact these estimates.5.5% through 2025.

Actual sales growth, excluding weather-related variations, may differ from our projections as a result of numerous factors, such as economic conditions, customer growth, usage patterns and energy conservation, slower ramp-up of and/or fewer data centers and large manufacturing facilities, slower than expected commercial and industrial expansions, impacts of energy efficiency programs, and growth in distributed generation,DG, and responses to retail price changes.  Based on past experience, a reasonable range of1% variation in our annual residential and small commercial and industrial kWh sales projections attributable to such economic factors under normal business conditions can result in increases or decreases in annual net income of up to approximately $15$20 million, and a 1% variation in our annual large commercial and industrial kWh sales projections under normal business conditions can result in increases or decreases in annual net income of approximately $5 million.
 
Weather.  In forecasting the retail sales growth numbers provided above, we assume normal weather patterns based on historical data.  Historically, extreme weather variations have resulted in annual variations in net income in excess of $25 million.  However, ourOur experience indicates that the more typical variations from normal weather can result in increases orand decreases in annual net income of up to $15 million.million; however, extreme weather variations have resulted in larger annual variations in net income.
 
Fuel and Purchased Power Costs.  Fuel and purchased power costs included on our Consolidated Statements of Income are impacted by our electricity sales volumes, existing contracts for purchased power and generation fuel, our power plant performance, transmission availability or constraints, prevailing market prices, new generating plants being placed in service in our market areas, changes in our generation resource allocation, our hedging program for managing such costs and PSA deferrals and the related amortization.

Operations and Maintenance ExpensesOperations and maintenance expenses are impacted by customer and sales growth, power plant operations, maintenance of utility plant (including generation, transmission, and distribution facilities), inflation, unplanned outages, planned outages (typically scheduled in the spring and fall), renewable energy and demand side managementDSM related expenses (which are offset by the same amount of operating revenues) and other factors.

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Depreciation and Amortization Expenses.  Depreciation and amortization expenses are impacted by net additions to utility plant and other property (such as new generation, transmission, and distribution facilities), and changes in depreciation and amortization rates.  See "Liquidity“Liquidity and Capital Resources"Resources” below for information regarding the planned additions to our facilities and income tax impacts related to bonus depreciation.facilities. 
 
Pension and Other Postretirement Non-Service Credits, Net.  Pension and other postretirement non-service credits can be impacted by changes in our actuarial assumptions. The most relevant actuarial assumptions are the discount rate used to measure our net periodic costs/credit, the expected long-term rate of return on plan assets used to estimate earnings on invested funds over the long-term, the mortality assumptions and the assumed healthcare cost trend rates. We review these assumptions on an annual basis and adjust them as necessary.

Property Taxes.  Taxes other than income taxes consist primarily of property taxes, which are affected by the value of property in-service and under construction, assessment ratios, and tax rates.  The average property tax rate in Arizona for APS, which owns essentially all of our property, was 10.9%10.2% of the assessed value for 2019, 11.0%2022, 10.7% for 20182021 and 11.2%10.8% for 2017. We expect2020. Property taxes decreased in 2022 due to recent legislative changes reducing both property taxes to increase astax assessment ratios and rates in Arizona. As we add new generating units and continue with improvements and expansions to our existing generating units andgeneration, transmission, and distribution facilities.facilities in future years, we anticipate property taxes may increase, though these increases will continue to be partially offset by the impacts of the recent legislative changes noted above. 
 
Income Taxes.  Income taxes are affected by the amount of pretax book income, income tax rates, certain deductions, and non-taxable items, such as AFUDC.  In addition, income taxes may also be affected by the settlement of issues with taxing authorities. On December 22, 2017, the Tax Cuts and Jobs Act (the "Tax Act"“Tax Act”) was enacted and was generally effective on January 1, 2018. Changes impacting the Company include a reduction in the corporate tax rate to 21%, revisions to the rules related to tax bonus depreciation, limitations on interest deductibility and an associated exception for certain public utilities, and requirements that certain excess deferred tax amounts of regulated utilities be normalized. (SeeSee Note 54 for details of the impacts on the Company as of December 31, 2019.)2022. In APS'sAPS’s 2017 Rate Case Decision, the ACC approved the TEAM, which iswas being used to pass through the income tax effects to retail customers of the Tax Act. (SeeAs part of the 2019 Rate Case (defined above), all impacts of the Tax Act were removed from the TEAM and incorporated into APS’s base rates. The TEAM was retained to address potential changes in tax law that may be enacted prior to a decision in APS’s next rate case. See Note 43 for details of the TEAM.)
 
Interest Expense.  Interest expense is affected by the amount of debt outstanding and the interest rates on that debt (seedebt. See Note 7).6 for further details.  The primary factors affecting borrowing levels are expected to be our capital expenditures, long-term debt maturities, equity issuances and internally generated cash flow.  An allowance for borrowed funds used during construction offsets a portion of interest expense while capital projects are under construction.  We stop accruing AFUDC on a project when it is placed in commercial operation.

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RESULTS OF OPERATIONS
 
Pinnacle West’s only reportable business segment is our regulated electricity segment, which consists of traditional regulated retail and wholesale electricity businesses (primarily sales supplied under traditional cost-based rate regulation) and related activities and includes electricity generation, transmission, and distribution.
 
Operating Results – 20192022 compared with 2018.

2021

Our consolidated net income attributable to common shareholders for the year ended December 31, 20192022, was $538$484 million, compared with $511$619 million for the prior year.  The results reflect an increasea decrease of approximately $30$114 million for the regulated electricity segment, which include higher depreciation and amortization expense primarily due to the absence of the Ocotillo modernization project and the Four Corners SCR project regulatory deferrals that ended upon the 2019 Rate Case effective date (see Note 3), increased plant assets and updated depreciation rates. In addition, the results reflect lower revenue driven by the LFCR alternative revenue treatment and higher operations and maintenance costs and tax expense due to amortization of excess deferred taxes as a result of the Tax Act,

expense. These negative factors were partially offset by lowerhigher revenue due todriven by the refunds provided to customers resulting from the Tax Act,effects of weather, customer usage and milder weathergrowth, increased transmission revenue and lower pension and other postretirement non-service credits.income taxes.

The following table presents net income attributable to common shareholders by business segment compared with the prior year:
 Year Ended
December 31,
 
20222021Net change
 (dollars in millions)
Regulated Electricity Segment:   
Operating revenues less fuel and purchased power expenses$2,690 $2,645 $45 
Operations and maintenance(983)(951)(32)
Depreciation and amortization(753)(651)(102)
Taxes other than income taxes(220)(235)15 
Pension and other postretirement non-service credits — net98 113 (15)
All other income and expenses, net23 61 (38)
Interest charges, net of allowance for borrowed funds used during construction(255)(233)(22)
Income taxes (Note 4)(75)(110)35 
Less income related to noncontrolling interests (Note 17)(17)(17)— 
Regulated electricity segment income508 622 (114)
All other(24)(3)(21)
Net Income Attributable to Common Shareholders$484 $619 $(135)

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Year Ended
December 31,
  
 2019 2018 Net change
 (dollars in millions)
Regulated Electricity Segment: 
  
  
Operating revenues less fuel and purchased power expenses$2,425
 $2,590
 $(165)
Operations and maintenance(939) (1,025) 86
Depreciation and amortization(591) (581) (10)
Taxes other than income taxes(219) (212) (7)
Pension and other postretirement non-service credits - net23
 50
 (27)
All other income and expenses, net61
 59
 2
Interest charges, net of allowance for borrowed funds used during construction(217) (218) 1
Income taxes (Note 5)16
 (134) 150
Less income related to noncontrolling interests (Note 19)(19) (19) 
Regulated electricity segment income540
 510
 30
All other(2) 1
 (3)
Net Income Attributable to Common Shareholders$538
 $511
 $27



Operating revenues less fuel and purchased power expensesRegulated electricity segment operating revenues less fuel and purchased power expenses were $165$45 million lowerhigher for the year ended December 31, 20192022, compared with the prior year.  The following table summarizes the major components of this change:

 Increase (Decrease)
 
Operating
revenues
 
Fuel and
purchased
power expenses
 Net change
 (dollars in millions)
Refunds due to lower Federal corporate income tax rate (Note 4)$(146) $
 $(146)
Effects of weather(32) (8) (24)
Lower renewable energy regulatory surcharges and higher purchased power, offset by operations and maintenance costs(15) 2
 (17)
Change in residential rate design (a)13
 
 13
Lost fixed cost recovery8
 
 8
Higher retail revenue due to higher customer growth, partially offset by the impacts of energy efficiency, distributed generation and changes in customer usage patterns10
 5
 5
Changes in net fuel and purchased power costs, including off-system sales margins and related deferrals(60) (61) 1
Miscellaneous items, net5
 10
 (5)
Total$(217) $(52) $(165)
(a) As part of the 2017 Settlement Agreement, rate design changes were implemented that moved some revenue responsibility from summer to non-summer months. The change was made to better align revenue collections with costs of service.

 Increase (Decrease)
 Operating
revenues
Fuel and
purchased
power expenses
Net change
(dollars in millions)
Lower refunds in the current year related to the Tax Act (Note 3)$141 $— $141 
Effects of weather77 19 58 
Higher retail revenue due to changes in customer usage patterns and customer growth, partially offset by the impacts of energy efficiency and distributed generation46 23 23 
Higher transmission revenues (Note 3)14 — 14 
Higher renewable energy regulatory surcharges, partially offset by operations and maintenance costs18 
Changes in net fuel and purchased power costs, including off-system sales margins and related deferrals425 426 (1)
Lost fixed cost recovery (Note 3)(54)— (54)
Impact of new retail base rates from 2019 Rate Case effective December 1, 2021(147)— (147)
Miscellaneous items, net— 
Total$522 $477 $45 
Operations and maintenance.  Operations and maintenance expenses decreased $86increased $32 million for the year ended December 31, 20192022, compared with the prior-year period primarily because of:

A decreasean increase of $42$14 million primarily related to public outreacha decreased recovery from contributions of administrative and general costs at the parent companyfrom Palo Verde owners and increased operating costs;
an increase of $10 million primarily associated with the ballot initiative in 2018;

A decrease of $28 million in fossil generation costs primarily due to lower planned outages and operating costs, including $4 million of Navajo Plant costs which were offset in depreciation and amortization;

A decrease of $19 million related to employee benefitstrategic planning consulting costs;

an increase of $6 million for costs related to transmission, distribution and customer service;
A decreasean increase of $18$6 million primarily related to costs for renewable energy and similar regulatory programs, which are partially offset in operating revenues and purchased power;

An increasea decrease of $12 million forin non-nuclear generation costs relatedprimarily due to information technology;lower planned outages and partially offset by higher operating costs; and

Anan increase of $12 million related to consulting costs; and

A decrease of $3$8 million for corporate resources and other miscellaneous factors.

Depreciation and amortization.  Depreciation and amortization expenses were $10$102 million higher for the year ended December 31, 20192022, compared with the prior-year period primarily due to $55 million for the Ocotillo modernization project and the Four Corners SCR project regulatory deferrals recorded in the prior year period that ended upon the 2019 Rate Case effective date and the related 2022 regulatory deferral amortization, and $47 million related to increased plant in service of $33 million, partially offset by the regulatory deferrals for the Four Corners SCR and Ocotillo modernization project of $19 million and the deferral of Navajo Plant costs of $4 million which is offset in operations and maintenance.updated depreciation rates.

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Taxes other than income taxes.  Taxes other than income taxes were $7$15 million higherlower for the year ended December 31, 20192022, compared with the prior-year period primarily due to higherthe impacts of recent legislative changes reducing both property values.tax assessment ratios and rates in Arizona and property tax deferrals that ended upon the 2019 Rate Case effective date and the related 2022 property tax deferral amortization.

Pension and other postretirement non-service credits, net. Pension and other postretirement non-service credits, net were $27$15 million lower for the year ended December 31, 20192022, compared to the prior-year period primarily due to loweractual market returns being lower than estimated returns in 2018.2021.

Income taxes.All other income and expenses, net. Income taxesAll other income and expenses, net were $150$38 million lower for the year ended December 31, 2022, compared to the prior-year period primarily due to the Ocotillo modernization and Four Corners SCR debt deferrals that ended upon the 2019 Rate Case effective date.

Interest charges, net of allowance for borrowed funds used during construction. Interest charges, net of allowance for borrowed funds used during construction were $22 million higher for the year ended December 31, 2022, compared to the prior-year period primarily due to higher debt balances and higher interest rates in the current period, partially offset by higher allowance for borrowed funds due to increased capital expenditures.

Income taxes.  Income taxes were $35 million lower for the year ended December 31, 2022, compared with the prior-year period primarily due to amortizationlower pre-tax net income, partially offset by a net operating loss carryback benefit that the Company recognized during the first quarter of excess deferred taxes and2021.

All Other. All other earnings were $21 million lower pretax incomefor year ended December 31, 2022, compared with the prior-year period primarily due to the Clear Creek wind farm impairment write-off. See “BCE Matters” in the current year period (see Note 5).10 for additional details.


LIQUIDITY AND CAPITAL RESOURCES
 
Overview
 
Pinnacle West’s primary cash needs are for dividends to our shareholders and principal and interest payments on our indebtedness.  The level of our common stock dividends and future dividend growth will be dependent on declaration by our Board of Directors and based on a number of factors, including our financial condition, payout ratio, free cash flow and other factors.
 
Our primary sources of cash are dividends from APS and external debt and equity issuances.  An ACC order requires APS to maintain a common equity ratio of at least 40%.  As defined in the related ACC order, the common equity ratio is defined as total shareholder equity divided by the sum of total shareholder equity and long-term debt, including current maturities of long-term debt.  At December 31, 2019,2022, APS’s common equity ratio, as defined, was 52%50%.  Its total shareholder equity was approximately $5.9$6.9 billion, and total capitalization was approximately $11.2$13.9 billion. Under this order, APS would be prohibited from paying dividends if such payment would reduce its total shareholder equity below approximately $4.5$5.6 billion, assuming APS’s total capitalization remains the same.  This restriction does not materially affect Pinnacle West’s ability to meet its ongoing cash needs or ability to pay dividends to shareholders.
 
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APS’s capital requirements consist primarily of capital expenditures and maturities of long-term debt.  APS funds its capital requirements with cash from operations and, to the extent necessary, external debt financings and equity infusions from Pinnacle West.


Summary of Cash Flows
 
The following tables present net cash provided by (used for) operating, investing, and financing activities for the years ended December 31, 20192022, and 20182021 (dollars in millions):

Pinnacle West Consolidated
2019 2018 20222021
Net cash flow provided by operating activities$957
 $1,277
Net cash flow provided by operating activities$1,242 $860 
Net cash flow used for investing activities(1,131) (1,193)Net cash flow used for investing activities(1,618)(1,387)
Net cash flow provided by (used for) financing activities179
 (92)
Net increase (decrease) in cash and cash equivalents$5
 $(8)
Net cash flow provided by financing activitiesNet cash flow provided by financing activities371 477 
Net decrease in cash and cash equivalentsNet decrease in cash and cash equivalents$(5)$(50)
 
Arizona Public Service Company
 20222021
Net cash flow provided by operating activities$1,230 $865 
Net cash flow used for investing activities(1,549)(1,391)
Net cash flow provided by financing activities314 478 
Net decrease in cash and cash equivalents$(5)$(48)
 2019 2018
Net cash flow provided by operating activities$1,007
 $1,255
Net cash flow used for investing activities(1,136) (1,187)
Net cash flow provided by (used for) financing activities133
 (76)
Net increase (decrease) in cash and cash equivalents$4
 $(8)

 Operating Cash Flows
 
20192022 Compared with 2018.2021. Pinnacle West’s consolidated net cash provided by operating activities was $957$1,242 million in 20192022 compared to $1,277$860 million in 2018. The decrease2021, an increase of $320$382 million in net cash provided is primarily due to lower$542 million higher cash receipts from electric revenues, higher$47 million lower payments for operations and maintenance costs, $100 million lower pension contributions and $79 million other changes in working capital, partially offset by $321 million higher fuel and purchased power costs, property$47 million higher income taxes and $18 million higher interest and higher pension contributions.payments. The difference between APSAPS’s and Pinnacle West'sWest’s net cash provided by operating activities primarily relates to Pinnacle West'sAPS’s income tax cash payments to APS, offset by lower operations and maintenance expense at the parent.Pinnacle West in 2021.

Retirement plans and other postretirement benefits. Pinnacle West sponsors a qualified defined benefit pension plan and a non-qualified supplemental excess benefit retirement plan for the employees of Pinnacle West and our subsidiaries. Pinnacle West also sponsors other postretirement benefit plans for the employees of Pinnacle West and its subsidiaries. The requirements of the Employee Retirement Income Security Act of 1974 ("ERISA"(“ERISA”) require us to contribute a minimum amount to the qualified plan.  We contribute at least the minimum amount required under ERISA regulations, but no more than the maximum tax-deductible amount.  The minimum required funding takes into consideration the value of plan assets and our pension benefit obligations.  Under ERISA, the qualified pension plan was 117%estimated to be 112% funded as of January 1, 20202023, and 112%was 139% as of January 1, 2019.  Under GAAP, the qualified pension plan was 97% funded as of January 1, 2020 and 90% funded as of January 1, 2019. See Note 8 for additional details. The assets in the plan are comprised of fixed-income, equity, real estate, and short-term investments.2022. Future year contribution amounts are dependent on plan asset performance and plan actuarial assumptions.  We made contributions to our pension plan totaling $150$0 million in 2019 and $502022, $100 million in 2018.2021, and $100 million in 2020.  The minimum required contributions for the pension plan are zero for the next three years.  Weyears and we do not expect to make any voluntary contributions up to $100 million per year during the 2020-2022 period.  With regard toin 2023, 2024 or 2025. Regarding contributions to our other postretirement benefit
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plan, we did not make a contributionany contributions in 20192022 or 2021 and 2018.  We do not expect to make any contributions over the next three years to our other postretirement benefit plans.in 2023, 2024 or 2025. The Company was reimbursed $30$26 million in 2019 and $722022, $24 million in 20182021, and $26 million in 2020 for prior years'years retiree medical claims from the other postretirement benefit plan trust assets. We continually monitor financial market volatility and its impact on our retirement plans and other postretirement benefits, but we believe our liability driven investment strategy helps to minimize the impact of market volatility on our plan’s funded status. For instance, our pension plan’s funded status, as measured for accounting principles generally accepted in the United States of America (“GAAP”) purposes, was 106% funded as of December 31, 2022, and our postretirement benefit plans were 159% funded, as measured for GAAP purposes at December 31, 2022. See Note 7 for additional details.


The CARES Act allows employers to defer payments of the employer share of Social Security payroll taxes that would have otherwise been owed from March 27, 2020, through December 31, 2020. We deferred the cash payment of the employer’s portion of Social Security payroll taxes for the period July 1, 2020, through December 31, 2020, that was approximately $18 million. As of December 31, 2022, we have paid this cash deferral in full.

Investing Cash Flows

20192022 Compared with 2018.2021. Pinnacle West’s consolidated net cash used for investing activities was $1,131$1,618 million in 20192022 compared to $1,193$1,387 million in 2018. The decrease2021, an increase of $62$231 million in net cash used primarily related to decreasedincreased capital expenditures and active union employee medical claim reimbursements (see Note 20). The difference between APS and Pinnacle West's net cash used for investing activities primarily relates to Pinnacle West's investing cash activity related to 4CA.BCE investment activity.

Capital Expenditures.  The following table summarizes the estimated capital expenditures for the next three years:
 
Capital Expenditures
(dollars in millions)
Estimated for the Year Ended
December 31,
 202320242025
APS
Generation:
Clean:
Nuclear Generation$120 $120 $120 
Renewables and Energy Storage Systems (“ESS”) (a)240 345 400 
Other Generation (b)265 245 245 
Distribution520 530 530 
Transmission260 300 300 
Other (c)265 260 255 
Total APS$1,670 $1,800 $1,850 
(a)APS Solar Communities program, energy storage, renewable projects, and other clean energy projects.
(b)Includes generation environmental projects.
(c)Primarily information systems and facilities projects.
The table above does not include capital expenditures related to BCE projects.
78

 
Estimated for the Year Ended
December 31,
 2020 2021 2022
APS 
  
  
Generation: 
  
  
Clean:     
Nuclear Generation$131
 $123
 $123
Renewables and Energy Storage Systems ("ESS") (a)121
 490
 671
Environmental44
 53
 44
Other Generation139
 154
 121
Distribution554
 444
 446
Transmission182
 203
 208
Other (b)160
 183
 112
Total APS$1,331
 $1,650
 $1,725

(a)APS Solar Communities program, energy storage, renewable projects and other clean energy projects
(b)Primarily information systems and facilities projects
Generation capital expenditures are comprised of various additions and improvements to APS’s clean resources, including nuclear plants, renewables and ESS. Generation capital expenditures also include improvements to existing fossil plants. Examples of the types of projects included in the forecast of generation capital expenditures are additions of renewables and energy storage, and upgrades and capital replacements of various nuclear and fossil power plant equipment, such as turbines, boilers, and environmental equipment.  We are monitoring the status of environmental matters, which, depending on their final outcome, could require modification to our planned environmental expenditures.

Distribution and transmission capital expenditures are comprised of infrastructure additions and upgrades, capital replacements, and new customer construction.  Examples of the types of projects included in the forecast include power lines, substations, and line extensions to new residential and commercial developments.

Capital expenditures will be funded with internally generated cash and external financings, which may include issuances of long-term debt and Pinnacle West common stock.
 

Financing Cash Flows and Liquidity
 
20192022 Compared with 2018.2021. Pinnacle West’s consolidated net cash provided by financing activities was $179$371 million in 20192022 compared to $92$477 million 2021, a decrease of net cash used in 2018, an increase of $271$106 million in net cash provided.  The increaseprovided primarily due to $150 million higher long-term debt repayments, a net decrease in net cash providedshort-term borrowings of $74 million and higher dividend payments of $9 million, partially offset by financing activities includes $647$129 million in higher issuances of long-term debt partially offset by higher long-term debt repayments of $418 million, a net increase in short term borrowings of $57 million and higher dividend payments of $21 million.debt.

APS’s consolidated net cash provided by financing activities was $133$314 million in 20192022 compared to $76$478 million in 2021, a decrease of net cash used in 2018, an increase of $209$164 million in net cash provided.  The increaseprovided primarily due to a net decrease in net cash providedshort-term borrowings of $232 million and higher dividend payments of $9 million, partially offset by financing activities includes $797$78 million in higher issuances of long-term debt partially offset by higher long-term debt repayments of $418 million, lower equity infusion of $150 million and higher dividend payments of $20 million.debt.

Significant Financing Activities.  On December 18, 2019,14, 2022, the Pinnacle West Board of Directors declared a dividend of $0.7825$0.865 per share of common stock, payable on March 2, 20201, 2023, to shareholders of record on February 3, 2020.1, 2023. During 2019,2022, Pinnacle West increased its indicated annual dividend from $2.95$3.40 per share to $3.13$3.46 per share. For the year ended December 31, 2019,2022, Pinnacle West'sWest’s total dividends paid per share of common stock were $3.00$3.42 per share, which resulted in dividend payments of $329$379 million.

On February 26, 2019, APS entered into a $200 million term loan agreement that matures August 26, 2020. APS used the proceeds to repay existing indebtedness. Borrowings under the agreement bear interest at London Inter-bank Offered Rate ("LIBOR") plus 0.50% per annum.

On February 28, 2019, APS issued $300 million of 4.25% unsecured senior notes that mature on March 1, 2049. The net proceeds from the sale, together with funds made available from the term loan described above, were used to repay existing indebtedness.

On March 1, 2019, APS repaid at maturity $500 million aggregate principal amount of its 8.75% senior notes.

On August 19, 2019, APS issued $300 million of 2.6% unsecured senior notes that mature on August 15, 2029. The net proceeds from the sale were used to repay short-term indebtedness, consisting of commercial paper borrowings, and to replenish cash used to fund capital expenditures.

On November 20, 2019, APS issued $300 million of 3.5% unsecured senior notes that mature on December 1, 2049. The net proceeds from the sale were used to repay short-term indebtedness, consisting of commercial paper borrowings, to replenish cash used to fund capital expenditures, and to redeem, on December 30, 2019, $100 million of the $250 million aggregate principal amount of our 2.2% Notes due January 15, 2020.

On January 15, 2020, APS repaid at maturity the remaining $150 million of the $250 million aggregate principal amount of its 2.2% senior notes mentioned above.

Available Credit FacilitiesPinnacle West and APS maintain committed revolving credit facilities in order to enhance liquidity and provide credit support for their commercial paper. See Note 5 for more information on available credit facilities.
On May 9, 2019, Pinnacle West entered into a $50 million term loan agreement that matures May 7, 2020. Pinnacle West used the proceeds to refinance indebtedness under and terminate a prior $150 million revolving credit facility. Borrowings under the agreement bear interest at LIBOR plus 0.55% per annum. At December 31, 2019, Pinnacle West had $38 million
in outstanding borrowings under the agreement.


At December 31, 2019, Pinnacle West had a $200 million revolving credit facility that matures in July 2023. Pinnacle West has the option to increase the amount of the facility up to a maximum of $300 million upon the satisfaction of certain conditions and with the consent of the lenders. Interest rates are based on Pinnacle West's senior unsecured debt credit ratings. The facility is available to support Pinnacle West's $200 million commercial paper program, for bank borrowings or for issuances of letters of credits. At December 31, 2019, Pinnacle West had no outstanding borrowings under its credit facility, no letters of credit outstanding and $77 million of commercial paper borrowings.

At December 31, 2019, APS had two revolving credit facilities totaling $1 billion, including a $500 million credit facility that matures in June 2022 and a $500 million facility that matures in July 2023.  APS may increase the amount of each facility up to a maximum of $700 million, for a total of $1.4 billion, upon the satisfaction of certain conditions and with the consent of the lenders.  Interest rates are based on APS’s senior unsecured debt credit ratings. These facilities are available to support APS’s $500 million commercial paper program, for bank borrowings or for issuances of letters of credit.  At December 31, 2019, APS had no commercial paper outstanding and no outstanding borrowings or letters of credit under its revolving credit facilities. See "Financial Assurances" in Note 11 for a discussion of APS's other outstanding letters of credit.

Other Financing Matters.  See Note 1715 for information related to the change in our margin and collateral accounts.
 
79

Debt Provisions
 
Pinnacle West’s and APS’s debt covenants related to their respective bank financing arrangements include maximum debt to capitalization ratios.  Pinnacle West and APS comply with these covenants.  For both Pinnacle West and APS, these covenants require that the ratio of consolidated debt to total consolidated capitalization not exceed 65%.  At December 31, 2019,2022, the ratio was approximately 52%58% for Pinnacle West and 47%51% for APS.  Failure to comply with such covenant levels would result in an event of default which, generally speaking, would require the immediate repayment of the debt subject to the covenants and could "cross-default"“cross-default” other debt.  See further discussion of "cross-default"“cross-default” provisions below.
 
Neither Pinnacle West’s nor APS’s financing agreements contain "rating triggers"“rating triggers” that would result in an acceleration of the required interest and principal payments in the event of a rating downgrade.  However, our bank credit agreements contain a pricing grid in which the interest rates we pay for borrowings thereunder are determined by our current credit ratings.
 
All of Pinnacle West’s loan agreements contain "cross-default"“cross-default” provisions that would result in defaults and the potential acceleration of payment under these loan agreements if Pinnacle West or APS were to default under certain other material agreements.  All of APS’s bank agreements contain "cross-default"“cross-default” provisions that would result in defaults and the potential acceleration of payment under these bank agreements if APS were to default under certain other material agreements.  Pinnacle West and APS do not have a material adverse change restriction for credit facility borrowings.

On December 17, 2020, the ACC issued a financing order that, subject to specified parameters and procedures, increased APS’s long-term debt limit from $5.9 billion to $7.5 billion, and authorized APS’s short-term debt authorization equal to the sum of (i) 7% of APS’s capitalization, and (ii) $500 million  (which is required to be used for costs relating to purchases of natural gas and power). On December 15, 2022, the ACC issued a financing order approving APS’s application filed April 6, 2022 requesting to increase the long-term debt limit from $7.5 billion to $8.0 billion and to exclude financing lease PPAs from the definition of long-term debt for purposes of the ACC financing orders. See Note 76 for further discussions of liquidity matters.

Credit Ratings

The ratings of securities of Pinnacle West and APS as of February 14, 202015, 2023, are shown below. We are disclosing these credit ratings to enhance understanding of our cost of short-term and long-term capital and our ability to access the markets for liquidity and long-term debt. The ratings reflect the respective views of the rating agencies, from which an explanation of the significance of their ratings may be obtained. There is no

assurance that these ratings will continue for any given period of time.period. The ratings may be revised or withdrawn entirely by the rating agencies if, in their respective judgments, circumstances so warrant. Any downward revision or withdrawal may adversely affect the market price of Pinnacle West’s or APS’s securities and/or result in an increase in the cost of, or limit access to, capital. Such revisions may also result in substantial additional cash or other collateral requirements related to certain derivative instruments, insurance policies, natural gas transportation, fuel supply, and other energy-related contracts. At this time, we believe we have sufficient available liquidity resources to respond to a potential downward revision to our credit ratings.
80

Moody’sStandard & Poor’sFitch
Pinnacle West
Corporate credit ratingBaa1BBB+BBB+
Senior unsecuredBaa1BBBBBB+
Commercial paperP-2A-2F2
OutlookNegativeNegativeNegative
Moody’sStandard & Poor’sFitch
Pinnacle WestAPS
Corporate credit ratingA3A-BBB+A-BBB+
Senior unsecuredA3BBB+A-
Commercial paperP-2A-2F2
OutlookNegativeStableNegativeNegative
APS
Corporate credit ratingA2A-A-
Senior unsecuredA2A-A
Commercial paperP-1A-2F2
OutlookNegativeStableNegative

Off-Balance Sheet Arrangements
See Note 19 for a discussion of the impacts on our financial statements of consolidating certain VIEs.

Contractual Obligations

The following table summarizes Pinnacle West’s consolidatedWest has contractual requirementsobligations and other commitments that will need to be funded in the future, in addition to its capital expenditure programs. Material contractual obligations and other commitments are as offollows:

Pinnacle West and APS have material long-term debt obligations that mature at various dates through 2050 and bear interest principally at fixed rates. Interest on variable-rate long-term debt is determined by using average rates at December 31, 2019 (dollars2022. See Note 6.

Pinnacle West and APS maintain committed revolving credit facilities. See Note 5 for short-term debt details.

Fuel and purchased power commitments include purchases of coal, electricity, natural gas, renewable energy, nuclear fuel, and natural gas transportation. See Notes 3 and 10. Purchase obligations include capital expenditures and other obligations. See Note 10. Commitments related to purchased power lease contracts are also considered fuel and purchased power commitments. See Note 8.

APS holds certain contracts to purchase renewable energy credits in millions):compliance with the RES. See Notes 3 and 10.

 2020 2021-
2022
 2023-
2024
 Thereafter Total
Long-term debt payments, including interest: (a)   
  
  
  
APS$554
 $398
 $757
 $7,405
 $9,114
Pinnacle West460
 
 
 
 460
Total long-term debt payments, including interest1,014
 398
 757
 7,405
 9,574
Short-term debt payments, including interest (b)115
 
 
 
 115
Fuel and purchased power commitments (c)569
 1,217
 1,176
 5,318
 8,280
Renewable energy credits (d)36
 66
 58
 133
 293
Purchase obligations (e)21
 20
 21
 196
 258
Coal reclamation17
 33
 37
 88
 175
Nuclear decommissioning funding requirements2
 4
 4
 50
 60
Noncontrolling interests (f)23
 46
 39
 143
 251
Operating lease payments (g)15
 20
 10
 39
 84
Total contractual commitments$1,812
 $1,804
 $2,102
 $13,372
 $19,090
(a)The long-term debt matures at various dates through 2049 and bears interest principally at fixed rates.  Interest on variable-rate long-term debt is determined by using average rates at December 31, 2019 (see Note 7).
(b)
See Note 6 for further details. APS is required to make payments to the noncontrolling interests related to the Palo Verde sale leaseback through 2033. See Note 17.
(c)Our fuel and purchased power commitments include purchases of coal, electricity, natural gas, renewable energy, nuclear fuel, and natural gas transportation (see Notes 4 and 11).
(d)Contracts to purchase renewable energy credits in compliance with the RES (see Note 4).
(e)These contractual obligations include commitments for capital expenditures and other obligations.
(f)Payments to the noncontrolling interests relate to the Palo Verde sale leaseback (see Note 19).
(g)Commitments relating to purchased power lease contracts are included within the fuel and purchased power commitments line above (see Note 9).
 
This table excludes $43 million in unrecognized tax benefits because the timing of the future cash outflows is uncertain.  Estimated minimum required pension contributions are zero for 2020, 2021 and 2022 (see Note 8).

CRITICAL ACCOUNTING POLICIES
 
In preparing the financial statements in accordance with GAAP, management must often make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses, and related disclosures at the date of the financial statements and during the reporting period.  Some of those judgments can be subjective and complex, and actual results could differ from those estimates.  We consider the following accounting policies to be our most critical because of the uncertainties, judgments and complexities of the underlying accounting standards and operations involved.
81



Regulatory Accounting

Regulatory accounting allows for the actions of regulators, such as the ACC and FERC, to be reflected in our financial statements.  Their actions may cause us to capitalize costs that would otherwise be included as an expense in the current period by unregulated companies.  Regulatory assets represent incurred costs that have been deferred because they are probable of future recovery in customer rates.  Regulatory liabilities generally represent amounts collected in rates to recover costs expected to be incurred in the future or amounts collected in excess of costs incurred and are refundable to customers. Management judgments include continually assessing the likelihood of future recovery of regulatory assets and/or a disallowance of part of the cost of recently completed plant, by considering factors such as applicable regulatory environment changes and recent rate orders to other regulated entities in the same jurisdiction.  This determination reflects the current political and regulatory climate in Arizona and is subject to change in the future.  If future recovery of costs ceases to be probable, the assets would be written off as a charge in current period earnings, except for pension benefits, which would be charged to OCI and result in lower future earnings.  Management judgments also include assessing the impact of potential ACC or FERC Commission-ordered refunds to customers on regulatory liabilities. We had $1,507$1,822 million of regulatory assets and $2,503$2,333 million of regulatory liabilities on the Consolidated Balance Sheets at December 31, 2019.
2022. See Notes 1 and 43 for more information.

Pensions and Other Postretirement Benefit Accounting

Changes in our actuarial assumptions used in calculating our pension and other postretirement benefit liabilityassets, liabilities and expense can have a significant impact on our earnings and financial position. The most relevant actuarial assumptions are the discount rate used to measure our liability and net periodic cost, the expected long-term rate of return on plan assets used to estimate earnings on invested funds over the long-term, the mortality assumptions, and the assumed healthcare cost trend rates.  We review these assumptions on an annual basis and adjust them as necessary. The most relevant actuarial assumptions are the discount rate, the expected long-term rate of return on plan assets (“EROA”), and the assumed healthcare cost trend rates. Differences between these actuarial assumptions and actual plan results may create volatility in pension and other postretirement benefit expense. To reduce this volatility, these differences are accumulated and amortized (subject to a corridor of 10% of the greater of plan assets or obligations) as part of the expense over a period of approximately 11 years. Following are the most relevant actuarial assumptions:

Discount Rate. The discount rate is used to measure the plan liability and net periodic cost. For this assumption, we utilize a yield curve produced by our actuary as of December 31st and employ their projections of the future benefit payments to estimate the projected benefit obligation for each plan. This process also yields a single equivalent discount rate that produces the same present value for the projection of estimated benefit payments that is generated by discounting each year’s benefit payments by a spot rate to that year. The spot rates are derived from a yield curve composed of domestic AA rated corporate bonds.

EROA. The EROA is used to estimate earnings on invested funds over the long-term. For this assumption we consider historical experience and future expectations of asset classes utilized in the portfolio.

Healthcare Cost Trend Rates. We consider past performance and forecasts of health care costs and our actuary provides the Company with a medical trend recommendation based on national medical trend, historical claims performance, benchmarking, and plan design changes.

82

The following chart reflects the sensitivities that a change in certain actuarial assumptions would have had on the December 31, 20192022 reported pension liabilityassets and liabilities on the Consolidated Balance Sheets and our 20192022 reported pension expense, after consideration of amounts capitalized or billed to electric plant participants, on Pinnacle West’sthe Consolidated Statements of Income (dollars in millions):
 Increase (Decrease)
Actuarial Assumption (a)Impact on
Pension
Plans
Impact on
Pension
Expense
Discount rate (b):  
Increase 1%$(238)$
Decrease 1%279 13 
EROA:
Increase 1%— (27)
Decrease 1%— 27 
  Increase (Decrease)
Actuarial Assumption (a) 
Impact on
Pension
Liability
 
Impact on
Pension
Expense
Discount rate:  
  
Increase 1% $(388) $(11)
Decrease 1% 471
 14
Expected long-term rate of return on plan assets:    
Increase 1% 
 (22)
Decrease 1% 
 22
(a)Each fluctuation assumes that the other assumptions of the calculation are held constant while the rates are changed by one percentage point.
(a)Each fluctuation assumes that the other assumptions of the calculation are held constant while the rates are changed by one percentage point.

(b)In general, changes in the discount rate will not typically have symmetrical effects for increases and decreases of the rate. Further, a 1% change in a low discount rate environment will have a larger impact than a 1% change in a high discount rate environment. Therefore, the discount rate sensitivities above cannot necessarily be extrapolated. Additionally, the Pension Plan utilizes a liability-driven strategy for its pension asset portfolio, and the obligation and expense sensitivities shown above do not reflect the offsetting impact that a change in interest rates may have on pension asset values.

The following chart reflects the sensitivities that a change in certain actuarial assumptions would have had on the December 31, 20192022, other postretirement benefit obligation on the Pinnacle West’s Consolidated Balance Sheets and our 20192022 reported other postretirement benefit expense, after consideration of amounts capitalized or billed to electric plant participants, on Pinnacle West’s Consolidated Statements of Income (dollars in millions): 
 Increase (Decrease)
Actuarial Assumption (a)Impact on Other
Postretirement 
Benefit Plans
Impact on Other
Postretirement
Benefit Expense
Discount rate (b):  
Increase 1%$(39)$(3)
Decrease 1%46 
Healthcare cost trend rate (c):
Increase 1%43 
Decrease 1%(36)(6)
EROA – pretax:
Increase 1%— (7)
Decrease 1%— 
83

  Increase (Decrease)
Actuarial Assumption (a) 
Impact on Other
Postretirement 
Benefit
Obligation
 
Impact on Other
Postretirement
Benefit Expense
Discount rate:  
  
Increase 1% $(104) $(1)
Decrease 1% 134
 5
Healthcare cost trend rate (b):    
Increase 1% 124
 9
Decrease 1% (98) (4)
Expected long-term rate of return on plan assets – pretax:  
  
Increase 1% 
 (4)
Decrease 1% 
 4
(a)Each fluctuation assumes that the other assumptions of the calculation are held constant while the rates are changed by one percentage point.
(a)Each fluctuation assumes that the other assumptions of the calculation are held constant while the rates are changed by one percentage point.
(b)This assumes a 1% change in the initial and ultimate healthcare cost trend rate.
(b)In general, changes in the discount rate will not typically have symmetrical effects for increases and decreases of the rate. Further, a 1% change in a low discount rate environment will have a larger impact than a 1% change in a high discount rate environment. Therefore, the discount rate sensitivities above cannot necessarily be extrapolated.
(c)This assumes a 1% change in the initial and ultimate healthcare cost trend rate.

See Note 87 for further details about our pension and other postretirement benefit plans.

Fair Value Measurements

We account for derivative instruments, investments held in our nuclear decommissioning trusttrusts fund, investments held in our other special use funds, certain cash equivalents, and plan assets held in our retirement and other benefit plans at fair value on a recurring basis.  Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.  We use inputs, or assumptions that market participants would use, to determine fair market value. We utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs.  The significance of a particular input determines how the instrument is classified in a fair value hierarchy.  The determination of fair value sometimes requires subjective and complex judgment.  Our assessment of the inputs and the significance of a particular input to fair value measurement may affect the valuation of the instruments and their placement within a fair value hierarchy.  Actual results could differ from our estimates of fair value.  See Note 1 for a discussion of accounting policies and Note 1412 for fair value measurement disclosures.

Asset Retirement Obligations

We recognize an ARO for the future decommissioning or retirement of our tangible long-lived assets for which a legal obligation exists. The ARO liability represents an estimate of the fair value of the current obligation related to decommissioning and the retirement of those assets. ARO measurements inherently involve uncertainty in the amount and timing of settlement of the liability. We use an expected cash flow approach to measure the amount we recognize as an ARO. This approach applies probability weighting to discounted future cash flow scenarios that reflect a range of possible outcomes. The scenarios consider settlement of the ARO at the expiration of the asset’s current license or lease term and expected

decommissioning dates. The fair value of an ARO is recognized in the period in which it is incurred. The associated asset retirement costs are capitalized as part of the carrying value of the long-lived asset and are depreciated over the life of the related assets. In addition, we accrete the ARO liability to reflect the passage of time. Changes in these estimates and assumptions could materially affect the amount of the recorded ARO for these assets. In accordance with GAAP accounting, APS accrues removal costs for its regulated utility assets, even if there is no legal obligation for removal.

AROs as of December 31, 20192022 are described further in Note 12.11.

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OTHER ACCOUNTING MATTERS

On January 1, 2019, we adopted new lease accounting guidance, ASU 2016-02, and related amendments. On July 1, 2019, we early adopted ASU 2018-15, relating to accounting for cloud computing implementation costs. On January 1, 2020, we adopted ASU 2016-13 and related amendments, relating to the measurementTable of credit losses on financial instruments. See Note 3 for additional information related to new accounting standards.Contents


MARKET AND CREDIT RISKS
 
Market Risks
 
Our operations include managing market risks related to changes in interest rates, commodity prices, and investments held by our nuclear decommissioning trust,trusts, other special use funds and benefit plan assets.
 
Interest Rate and Equity Risk
 
We have exposure to changing interest rates.  Changing interest rates will affect interest paid on variable-rate debt and the market value of fixed income securities held by our nuclear decommissioning trust, other special use funds (see Note 14Notes 12 and Note 20)18), and benefit plan assets.  The nuclear decommissioning trust, other special use funds and benefit plan assets also have risks associated with the changing market value of their equity and other non-fixed income investments.  Nuclear decommissioning and benefit plan costs are recovered in regulated electricity prices.


The tables below present contractual balances of our consolidated long-term and short-term debt at the expected maturity dates, as well as the fair value of those instruments on December 31, 20192022, and 2018.2021.  The interest rates presented in the tables below represent the weighted-average interest rates as of December 31, 20192022, and 20182021 (dollars in millions):
 
Pinnacle West – Consolidated
 Short-Term
Debt
Variable-Rate
Long-Term Debt
Fixed-Rate
Long-Term Debt
 Interest Interest Interest 
2022RatesAmountRatesAmountRatesAmount
20234.56 %$341 5.42 %$51 — $— 
2024— — 5.10 %450 3.35 %250 
2025— — — — 1.99 %800 
2026— — — — 2.55 %250 
2027— — — — 2.95 %300 
Years thereafter— — 3.96 %163 4.10 %5,580 
Total $341 $664  $7,180 
Fair value $341  $664  $5,922 

85

Short-Term
Debt
Variable-Rate
Long-Term Debt
Fixed-Rate
Long-Term Debt
 
Short-Term
Debt
 
Variable-Rate
Long-Term Debt
 
Fixed-Rate
Long-Term Debt
Interest Interest Interest 
 Interest   Interest   Interest  
2019 Rates Amount Rates Amount Rates Amount
2020 2.06% $115
 2.16% $350
 2.23% $450
2021 
 
 
 
 
 
2021RatesAmountRatesAmountRatesAmount
2022 
 
 
 
 
 
20220.18 %$292 0.78 %$150 — $— 
2023 
 
 
 
 
 
2023— — — — — — 
2024 
 
 
 
 3.78% 365
2024— — 0.85 %150 3.35 %250 
20252025— — — — 1.99 %800 
20262026— — — — 2.55 %250 
Years thereafter 
 
 1.54% 36
 4.12% 4,475
Years thereafter— — 0.22 %36 3.87 %5,480 
Total  
 $115
   $386
  
 $5,290
Total $292 $336  $6,780 
Fair value  
 $115
  
 $386
  
 $5,808
Fair value $292  $336  $7,390 
  
Short-Term
Debt
 
Variable-Rate
Long-Term Debt
 
Fixed-Rate
Long-Term Debt
  Interest   Interest   Interest  
2018 Rates Amount Rates Amount Rates Amount
2019 2.99% $76
 
 $
 8.75% $500
2020 
 
 3.02% 150
 2.23% 550
2021 
 
 
 
 
 
2022 
 
 
 
 
 
2023 
 
 
 
 
 
Years thereafter 
 
 1.76% 36
 4.25% 3,940
Total  
 $76
   $186
  
 $4,990
Fair value  
 $76
  
 $186
  
 $5,048


The tables below present contractual balances of APS’s long-term and short-term debt at the expected maturity dates, as well as the fair value of those instruments on December 31, 20192022, and 2018.2021.  The interest rates presented in the tables below represent the weighted-average interest rates as of December 31, 20192022, and 20182021 (dollars in millions):
 
APS — Consolidated
Short-Term
Debt
Variable-Rate
Long-Term Debt
Fixed-Rate
Long-Term Debt
 
Variable-Rate
Long-Term Debt
 
Fixed-Rate
Long-Term Debt
Interest Interest Interest 
 Interest   Interest  
2019 Rates Amount Rates Amount
2020 2.12% $200
 2.20% $150
2021 
 
 
 
2022 
 
 
 
2022RatesAmountRatesAmountRatesAmount
2023 
 
 
 
20234.56 %$325 — $— — $— 
2024 
 
 3.78% 365
2024— — — — 3.35 %250 
20252025— — — — 3.15 %300 
20262026— — — — 2.55 %250 
20272027— — — — 2.95 %300 
Years thereafter 1.54% 36
 4.12% 4,475
Years thereafter— — 3.96 %163 4.10 %5,580 
Total   $236
  
 $4,990
Total $325 $163  $6,680 
Fair value  
 $236
  
 $5,508
Fair value $325  $163  $5,466 
 
  
Variable-Rate
Long-Term Debt
 
Fixed-Rate
Long-Term Debt
  Interest   Interest  
2018 Rates Amount Rates Amount
2019��
 $
 8.75% $500
2020 
 
 2.20% 250
2021 
 
 
 
2022 
 
 
 
2023 
 
 
 
Years thereafter 1.76% 36
 4.25% 3,940
Total   $36
   $4,690
Fair value  
 $36
  
 $4,754
86

 Short-Term
Debt
Variable-Rate
Long-Term Debt
Fixed-Rate
Long-Term Debt
 Interest Interest Interest 
2021RatesAmountRatesAmountRatesAmount
20220.18 %$279 — $— — $— 
2023— — — — — — 
2024— — — — 3.35 %250 
2025— — — — 3.15 %300 
2026— — — — 2.55 %250 
Years thereafter— — 0.22 %36 3.87 %5,480 
Total $279 $36 $6,280 
Fair value $279  $36  $6,898 
 

Commodity Price Risk
 
We are exposed to the impact of market fluctuations in the commodity price and transportation costs of electricity and natural gas.  Our risk management committee, consisting of officers and key management personnel, oversees company-wide energy risk management activities to ensure compliance with our stated energy risk management policies.  We manage risks associated with these market fluctuations by utilizing various commodity instruments that may qualify as derivatives, including futures, forwards, options, and swaps.  As part of our risk management program, we use such instruments to hedge purchases and sales of electricity and fuels.natural gas.  The changes in market value of such contracts have a high correlation to price changes in the hedged commodities.


The following table shows the net pretax changes in mark-to-market of our energy derivative positions in 2019 and 2018 (dollars in millions):
 December 31, 2022December 31, 2021
Mark-to-market of net positions at beginning of year$107 $(13)
Increase (decrease) in regulatory liability(11)120 
Mark-to-market of net positions at end of year$96 $107 
 2019 2018
Mark-to-market of net positions at beginning of year$(58) $(91)
Decrease (Increase) in regulatory asset(15) 31
Recognized in OCI:   
Mark-to-market losses realized during the period2
 2
Change in valuation techniques
 
Mark-to-market of net positions at end of year$(71) $(58)

The table below shows the fair value of maturities of our energy derivative contracts (dollars in millions) at December 31, 20192022, by maturities and by the type of valuation that is performed to calculate the fair values, classified in their entirety based on the lowest level of input that is significant to the fair value measurement.  See Note 1, “Derivative Accounting” and “Fair Value Measurements,” for more discussion of our valuation methods.
Source of Fair Value20232024202520262027Total 
Fair 
Value
Observable prices provided by other external sources$70 $31 $— $— $— $101 
Prices based on unobservable inputs(14)— — — (5)
Total by maturity$56 $40 $— $— $— $96 

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Source of Fair Value 2020 2021 2022 2023 2024 
Total 
fair 
value
Observable prices provided by other external sources $(36) $(17) $(10) $(4) $
 $(67)
Prices based on unobservable inputs (2) 
 
 
 (2) (4)
Total by maturity $(38) $(17) $(10) $(4) $(2) $(71)

The table below shows the impact that hypothetical price movements of 10% would have on the market value of our risk management assets and liabilities included on Pinnacle West’s Consolidated Balance Sheets at December 31, 2019 and 2018 (dollars in millions):
 December 31, 2022
Gain (Loss)
December 31, 2021
Gain (Loss)
 Price Up  10%Price Down 10%Price Up  10%Price Down 10%
Mark-to-market changes reported in:    
Regulatory asset (liability) (a)    
Electricity$12 $(12)$— $— 
Natural gas55 (55)50 (50)
Total$67 $(67)$50 $(50)
 
December 31, 2019
Gain (Loss)
 
December 31, 2018
Gain (Loss)
 Price Up  10% Price Down 10% Price Up  10% Price Down 10%
Mark-to-market changes reported in: 
  
  
  
Regulatory asset (liability) (a) 
  
  
  
Electricity$
 $
 $1
 $(1)
Natural gas55
 (55) 44
 (44)
Total$55
 $(55) $45
 $(45)
(a)These contracts are economic hedges of our forecasted purchases of natural gas and electricity.  The impact of these hypothetical price movements would substantially offset the impact that these same price movements would have on the physical exposures being hedged.  To the extent the amounts are eligible for inclusion in the PSA, the amounts are recorded as either a regulatory asset or liability.

(a)These contracts are economic hedges of our forecasted purchases of natural gas and electricity.  The impact of these hypothetical price movements would substantially offset the impact that these same price movements would have on the physical exposures being hedged.  To the extent the amounts are eligible for inclusion in the PSA, the amounts are recorded as either a regulatory asset or liability.

Credit Risk
 
We are exposed to losses in the event of non-performance or non-payment by counterparties.  See Note 1715 for a discussion of our credit valuation adjustment policy.


ITEM 7A.  QUANTITATIVE AND QUALITATIVE
DISCLOSURES ABOUT MARKET RISK
 
See “Market and Credit Risks” in Item 7 above for a discussion of quantitative and qualitative disclosures about market risks.


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ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
 
INDEX TO FINANCIAL STATEMENTS AND
FINANCIAL STATEMENT SCHEDULES
 
Page
 
See Note 13 for the selected quarterly financial data (unaudited) required to be presented in this Item.

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MANAGEMENT’S REPORT ON INTERNAL CONTROL
OVER FINANCIAL REPORTING
(PINNACLE WEST CAPITAL CORPORATION)

 
Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f), for Pinnacle West Capital Corporation.  Management conducted an evaluation of the effectiveness of our internal control over financial reporting based on the framework in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.  Based on our evaluation under the framework in Internal Control — Integrated Framework (2013), our management concluded that our internal control over financial reporting was effective as of December 31, 2019.2022.  The effectiveness of our internal control over financial reporting as of December 31, 20192022, has been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their report which is included herein and also relates to the Company’s consolidated financial statements.
 
February 21, 202027, 2023


90

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Shareholders and the Board of Directors of
Pinnacle West Capital Corporation
Phoenix, Arizona

Opinions on the Financial Statements and Internal Control over Financial Reporting
We have audited the accompanying consolidated balance sheets of Pinnacle West Capital Corporation and subsidiaries (the "Company") as of December 31, 2019 and 2018, the related consolidated statements of income, comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2019, the related notes and the schedules listed in the Index at Item 15 (collectively referred to as the "financial statements"). We also have audited the Company’s internal control over financial reporting as of December 31, 2019, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).
In our opinion, the financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America. Also, in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2019, based on criteria established in Internal Control - Integrated Framework (2013) issued by COSO.

Basis for Opinions
The Company’s management is responsible for these financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on these financial statements and an opinion on the Company’s internal control over financial reporting based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained in all material respects.
Our audits of the financial statements included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures to respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.



Definition and Limitations of Internal Control over Financial Reporting
A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Critical Audit Matter
The critical audit matter communicated below is a matter arising from the current-period audit of the financial statements that was communicated or required to be communicated to the audit committee and that (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.
Regulatory Accounting - Impact of Rate Regulation on the Financial Statements - Refer to Note 1 and Note 4 to the Financial Statements.
Critical Audit Matter Description
Arizona Public Service Company (“APS”), which is
 20222021
Net cash flow provided by operating activities$1,230 $865 
Net cash flow used for investing activities(1,549)(1,391)
Net cash flow provided by financing activities314 478 
Net decrease in cash and cash equivalents$(5)$(48)

Operating Cash Flows
2022 Compared with 2021. Pinnacle West’s consolidated net cash provided by operating activities was $1,242 million in 2022 compared to $860 million in 2021, an increase of $382 million in net cash provided primarily due to $542 million higher cash receipts from electric revenues, $47 million lower payments for operations and maintenance costs, $100 million lower pension contributions and $79 million other changes in working capital, partially offset by $321 million higher fuel and purchased power costs, $47 million higher income taxes and $18 million higher interest payments. The difference between APS’s and Pinnacle West’s net cash provided by operating activities primarily relates to APS’s income tax cash payments to Pinnacle West in 2021.

Retirement plans and other postretirement benefits. Pinnacle West sponsors a wholly-owned subsidiaryqualified defined benefit pension plan and a non-qualified supplemental excess benefit retirement plan for the employees of Pinnacle West and our subsidiaries. Pinnacle West also sponsors other postretirement benefit plans for the employees of Pinnacle West and its subsidiaries. The requirements of the Company, is subjectEmployee Retirement Income Security Act of 1974 (“ERISA”) require us to rate regulation by the Arizona Corporation Commission (the “ACC”), which has jurisdiction with respectcontribute a minimum amount to the rates charged by public service utilitiesqualified plan.  We contribute at least the minimum amount required under ERISA regulations, but no more than the maximum tax-deductible amount.  Under ERISA, the qualified pension plan was estimated to be 112% funded as of January 1, 2023, and was 139% as of January 1, 2022. Future year contribution amounts are dependent on plan asset performance and plan actuarial assumptions.  We made contributions to our pension plan totaling $0 million in Arizona. Management has determined it meets2022, $100 million in 2021, and $100 million in 2020.  The minimum required contributions for the requirements underpension plan are zero for the next three years and we do not expect to make any voluntary contributions in 2023, 2024 or 2025. Regarding contributions to our other postretirement benefit
77

plan, we did not make any contributions in 2022 or 2021 and do not expect to make any contributions in 2023, 2024 or 2025. The Company was reimbursed $26 million in 2022, $24 million in 2021, and $26 million in 2020 for prior years retiree medical claims from the other postretirement benefit plan trust assets. We continually monitor financial market volatility and its impact on our retirement plans and other postretirement benefits, but we believe our liability driven investment strategy helps to minimize the impact of market volatility on our plan’s funded status. For instance, our pension plan’s funded status, as measured for accounting principles generally accepted in the United States of America (“GAAP”) purposes, was 106% funded as of December 31, 2022, and our postretirement benefit plans were 159% funded, as measured for GAAP purposes at December 31, 2022. See Note 7 for additional details.

The CARES Act allows employers to prepare its financial statements applyingdefer payments of the specialized rules to accountemployer share of Social Security payroll taxes that would have otherwise been owed from March 27, 2020, through December 31, 2020. We deferred the cash payment of the employer’s portion of Social Security payroll taxes for the effectsperiod July 1, 2020, through December 31, 2020, that was approximately $18 million. As of cost-based rate regulation. AccountingDecember 31, 2022, we have paid this cash deferral in full.

Investing Cash Flows

2022 Compared with 2021. Pinnacle West’s consolidated net cash used for investing activities was $1,618 million in 2022 compared to $1,387 million in 2021, an increase of $231 million in net cash used primarily related to increased capital expenditures and BCE investment activity.

Capital Expenditures.  The following table summarizes the estimated capital expenditures for the economicsnext three years:
Capital Expenditures
(dollars in millions)
Estimated for the Year Ended
December 31,
 202320242025
APS
Generation:
Clean:
Nuclear Generation$120 $120 $120 
Renewables and Energy Storage Systems (“ESS”) (a)240 345 400 
Other Generation (b)265 245 245 
Distribution520 530 530 
Transmission260 300 300 
Other (c)265 260 255 
Total APS$1,670 $1,800 $1,850 
(a)APS Solar Communities program, energy storage, renewable projects, and other clean energy projects.
(b)Includes generation environmental projects.
(c)Primarily information systems and facilities projects.
The table above does not include capital expenditures related to BCE projects.
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Generation capital expenditures are comprised of various additions and disclosures,improvements to APS’s clean resources, including nuclear plants, renewables and ESS. Generation capital expenditures also include improvements to existing fossil plants. Examples of the types of projects included in the forecast of generation capital expenditures are additions of renewables and energy storage, and upgrades and capital replacements of various nuclear and fossil power plant equipment, such as property, plantturbines, boilers, and equipment; regulatory assetsenvironmental equipment.  We are monitoring the status of environmental matters, which, depending on their final outcome, could require modification to our planned environmental expenditures.

Distribution and liabilities; operating revenues;transmission capital expenditures are comprised of infrastructure additions and upgrades, capital replacements, and new customer construction.  Examples of the types of projects included in the forecast include power lines, substations, and line extensions to new residential and commercial developments.

Capital expenditures will be funded with internally generated cash and external financings, which may include issuances of long-term debt and Pinnacle West common stock.
Financing Cash Flows and Liquidity
2022 Compared with 2021. Pinnacle West’s consolidated net cash provided by financing activities was $371 million in 2022 compared to $477 million 2021, a decrease of $106 million in net cash provided primarily due to $150 million higher long-term debt repayments, a net decrease in short-term borrowings of $74 million and higher dividend payments of $9 million, partially offset by $129 million in higher issuances of long-term debt.

APS’s consolidated net cash provided by financing activities was $314 million in 2022 compared to $478 million in 2021, a decrease of $164 million in net cash provided primarily due to a net decrease in short-term borrowings of $232 million and higher dividend payments of $9 million, partially offset by $78 million in higher issuances of long-term debt.

Significant Financing Activities.  On December 14, 2022, the Pinnacle West Board of Directors declared a dividend of $0.865 per share of common stock, payable on March 1, 2023, to shareholders of record on February 1, 2023. During 2022, Pinnacle West increased its indicated annual dividend from $3.40 per share to $3.46 per share. For the year ended December 31, 2022, Pinnacle West’s total dividends paid per share of common stock were $3.42 per share, which resulted in dividend payments of $379 million.

Available Credit FacilitiesPinnacle West and APS maintain committed revolving credit facilities in order to enhance liquidity and provide credit support for their commercial paper. See Note 5 for more information on available credit facilities.

Other Financing Matters.  See Note 15 for information related to the change in our margin and collateral accounts.
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Debt Provisions
Pinnacle West’s and APS’s debt covenants related to their respective bank financing arrangements include maximum debt to capitalization ratios.  Pinnacle West and APS comply with these covenants.  For both Pinnacle West and APS, these covenants require that the ratio of consolidated debt to total consolidated capitalization not exceed 65%.  At December 31, 2022, the ratio was approximately 58% for Pinnacle West and 51% for APS.  Failure to comply with such covenant levels would result in an event of default which, generally speaking, would require the immediate repayment of the debt subject to the covenants and could “cross-default” other debt.  See further discussion of “cross-default” provisions below.
Neither Pinnacle West’s nor APS’s financing agreements contain “rating triggers” that would result in an acceleration of the required interest and principal payments in the event of a rating downgrade.  However, our bank credit agreements contain a pricing grid in which the interest rates we pay for borrowings thereunder are determined by our current credit ratings.
All of Pinnacle West’s loan agreements contain “cross-default” provisions that would result in defaults and the potential acceleration of payment under these loan agreements if Pinnacle West or APS were to default under certain other material agreements.  All of APS’s bank agreements contain “cross-default” provisions that would result in defaults and the potential acceleration of payment under these bank agreements if APS were to default under certain other material agreements.  Pinnacle West and APS do not have a material adverse change restriction for credit facility borrowings.

On December 17, 2020, the ACC issued a financing order that, subject to specified parameters and procedures, increased APS’s long-term debt limit from $5.9 billion to $7.5 billion, and authorized APS’s short-term debt authorization equal to the sum of (i) 7% of APS’s capitalization, and (ii) $500 million  (which is required to be used for costs relating to purchases of natural gas and power). On December 15, 2022, the ACC issued a financing order approving APS’s application filed April 6, 2022 requesting to increase the long-term debt limit from $7.5 billion to $8.0 billion and to exclude financing lease PPAs from the definition of long-term debt for purposes of the ACC financing orders. See Note 6 for further discussions of liquidity matters.

Credit Ratings

The ratings of securities of Pinnacle West and APS as of February 15, 2023, are shown below. We are disclosing these credit ratings to enhance understanding of our cost of short-term and long-term capital and our ability to access the markets for liquidity and long-term debt. The ratings reflect the respective views of the rating agencies, from which an explanation of the significance of their ratings may be obtained. There is no assurance that these ratings will continue for any given period. The ratings may be revised or withdrawn entirely by the rating agencies if, in their respective judgments, circumstances so warrant. Any downward revision or withdrawal may adversely affect the market price of Pinnacle West’s or APS’s securities and/or result in an increase in the cost of, or limit access to, capital. Such revisions may also result in substantial additional cash or other collateral requirements related to certain derivative instruments, insurance policies, natural gas transportation, fuel supply, and other energy-related contracts. At this time, we believe we have sufficient available liquidity resources to respond to a potential downward revision to our credit ratings.
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Moody’sStandard & Poor’sFitch
Pinnacle West
Corporate credit ratingBaa1BBB+BBB+
Senior unsecuredBaa1BBBBBB+
Commercial paperP-2A-2F2
OutlookNegativeNegativeNegative
APS
Corporate credit ratingA3BBB+BBB+
Senior unsecuredA3BBB+A-
Commercial paperP-2A-2F2
OutlookNegativeNegativeNegative
Contractual Obligations

Pinnacle West has contractual obligations and other commitments that will need to be funded in the future, in addition to its capital expenditure programs. Material contractual obligations and other commitments are as follows:

Pinnacle West and APS have material long-term debt obligations that mature at various dates through 2050 and bear interest principally at fixed rates. Interest on variable-rate long-term debt is determined by using average rates at December 31, 2022. See Note 6.

Pinnacle West and APS maintain committed revolving credit facilities. See Note 5 for short-term debt details.

Fuel and purchased power commitments include purchases of coal, electricity, natural gas, renewable energy, nuclear fuel, and natural gas transportation. See Notes 3 and 10. Purchase obligations include capital expenditures and other obligations. See Note 10. Commitments related to purchased power lease contracts are also considered fuel and purchased power; operationspower commitments. See Note 8.

APS holds certain contracts to purchase renewable energy credits in compliance with the RES. See Notes 3 and maintenance expense; and depreciation expense.10.
Rates are subject
APS is required to make payments to the rate-making policiesnoncontrolling interests related to the Palo Verde sale leaseback through 2033. See Note 17.
CRITICAL ACCOUNTING POLICIES
In preparing the financial statements in accordance with GAAP, management must often make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses, and related disclosures at the date of the ACC. Rates are determinedfinancial statements and approvedduring the reporting period.  Some of those judgments can be subjective and complex, and actual results could differ from those estimates.  We consider the following accounting policies to be our most critical because of the uncertainties, judgments and complexities of the underlying accounting standards and operations involved.
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Regulatory Accounting

Regulatory accounting allows for the actions of regulators, such as the ACC and FERC, to be reflected in regulatory proceedings based onour financial statements.  Their actions may cause us to capitalize costs that would otherwise be included as an analysis of costs to provide utility service and a return on, and recovery of, investmentexpense in the utility business.current period by unregulated companies.  Regulatory decisions canassets represent incurred costs that have an impact on thebeen deferred because they are probable of future recovery ofin customer rates.  Regulatory liabilities generally represent amounts collected in rates to recover costs the rate of return earned on investment, and the timing and amount of assetsexpected to be recovered by rates. The ACC’s rate-making policies are premised on the full recovery of prudently incurred costs and a reasonable rate of return on invested capital. Decisions to be made by the ACC in the future will impact the accounting for regulated operations, including decisions about the amountor amounts collected in excess of allowable deferred costs incurred and return on invested capital included in rates and any refunds that may be required. While the Company has indicated it expectsare refundable to recover costs from customers through regulated rates, there is a risk that the ACC will not approve: (1) full recovery of

the costs of providing utility service, or (2) full recovery of all amounts invested in the utility business and a reasonable return on that investment.
We identified Regulatory Accounting, specifically the impact of rate regulation on the financial statements, as a critical audit matter due to the significant judgments made by management to support its assertions about impacted account balances and disclosures and the high degree of subjectivity involved in assessing the impact of future regulatory rate orders on the financial statements.customers. Management judgments include continually assessing the likelihood of future recovery of regulatory assets and/or a disallowance of part of the cost of recently completed plant, by considering factors such as applicable regulatory environment changes and recent rate orders to other regulated entities in the same jurisdiction.  This determination reflects the current political and regulatory climate in Arizona and is subject to change in the future.  If future recovery of regulatory assetscosts ceases to be probable, orthe assets would be written off as a disallowance becomes probable, itcharge in current period earnings, except for pension benefits, which would be charged to OCI and result in a charge tolower future earnings.  Management judgments also include assessing the impact of potential ACC-orderedACC or FERC Commission-ordered refunds to customers on regulatory liabilities. Given that management’s accounting judgments are based on assumptions about the outcomeWe had $1,822 million of future decisions by the ACC, auditing these judgments required specialized knowledge of accounting for rate regulation and the rate setting process due to its inherent complexities.
How the Critical Audit Matter Was Addressed in the Audit
Our audit procedures related to the uncertainty of future decisions by the ACC included the following, among others:
We tested the effectiveness of management’s controls over the evaluation of the likelihood of (1) the recovery in future rates of costs of recently completed plant and costs deferred as regulatory assets and (2)$2,333 million of regulatory liabilities on the Consolidated Balance Sheets at December 31, 2022. See Notes 1 and 3 for more information.

Pensions and Other Postretirement Benefit Accounting

Changes in our actuarial assumptions used in calculating our pension and other postretirement benefit assets, liabilities and expense can have a refundsignificant impact on our earnings and financial position. We review these assumptions on an annual basis and adjust them as necessary. The most relevant actuarial assumptions are the discount rate, the expected long-term rate of return on plan assets (“EROA”), and the assumed healthcare cost trend rates. Differences between these actuarial assumptions and actual plan results may create volatility in pension and other postretirement benefit expense. To reduce this volatility, these differences are accumulated and amortized (subject to a corridor of 10% of the greater of plan assets or obligations) as part of the expense over a period of approximately 11 years. Following are the most relevant actuarial assumptions:

Discount Rate. The discount rate is used to measure the plan liability and net periodic cost. For this assumption, we utilize a yield curve produced by our actuary as of December 31st and employ their projections of the future reduction inbenefit payments to estimate the projected benefit obligation for each plan. This process also yields a single equivalent discount rate that produces the same present value for the projection of estimated benefit payments that is generated by discounting each year’s benefit payments by a spot rate to that year. The spot rates that should be reported as regulatory liabilities. We also tested the effectivenessare derived from a yield curve composed of management’s controlsdomestic AA rated corporate bonds.

EROA. The EROA is used to estimate earnings on invested funds over the initial recognitionlong-term. For this assumption we consider historical experience and future expectations of asset classes utilized in the portfolio.

Healthcare Cost Trend Rates. We consider past performance and forecasts of health care costs and our actuary provides the Company with a medical trend recommendation based on national medical trend, historical claims performance, benchmarking, and plan design changes.

82

The following chart reflects the sensitivities that a change in certain actuarial assumptions would have had on the December 31, 2022 reported pension assets and liabilities on the Consolidated Balance Sheets and our 2022 reported pension expense, after consideration of amounts as property,capitalized or billed to electric plant participants, on the Consolidated Statements of Income (dollars in millions):
 Increase (Decrease)
Actuarial Assumption (a)Impact on
Pension
Plans
Impact on
Pension
Expense
Discount rate (b):  
Increase 1%$(238)$
Decrease 1%279 13 
EROA:
Increase 1%— (27)
Decrease 1%— 27 
(a)Each fluctuation assumes that the other assumptions of the calculation are held constant while the rates are changed by one percentage point.
(b)In general, changes in the discount rate will not typically have symmetrical effects for increases and equipment; regulatory assets or liabilities;decreases of the rate. Further, a 1% change in a low discount rate environment will have a larger impact than a 1% change in a high discount rate environment. Therefore, the discount rate sensitivities above cannot necessarily be extrapolated. Additionally, the Pension Plan utilizes a liability-driven strategy for its pension asset portfolio, and the monitoringobligation and evaluationexpense sensitivities shown above do not reflect the offsetting impact that a change in interest rates may have on pension asset values.

The following chart reflects the sensitivities that a change in certain actuarial assumptions would have had on the December 31, 2022, other postretirement benefit obligation on the Pinnacle West’s Consolidated Balance Sheets and our 2022 reported other postretirement benefit expense, after consideration of regulatory developmentsamounts capitalized or billed to electric plant participants, on Pinnacle West’s Consolidated Statements of Income (dollars in millions): 
 Increase (Decrease)
Actuarial Assumption (a)Impact on Other
Postretirement 
Benefit Plans
Impact on Other
Postretirement
Benefit Expense
Discount rate (b):  
Increase 1%$(39)$(3)
Decrease 1%46 
Healthcare cost trend rate (c):
Increase 1%43 
Decrease 1%(36)(6)
EROA – pretax:
Increase 1%— (7)
Decrease 1%— 
83

(a)Each fluctuation assumes that the other assumptions of the calculation are held constant while the rates are changed by one percentage point.
(b)In general, changes in the discount rate will not typically have symmetrical effects for increases and decreases of the rate. Further, a 1% change in a low discount rate environment will have a larger impact than a 1% change in a high discount rate environment. Therefore, the discount rate sensitivities above cannot necessarily be extrapolated.
(c)This assumes a 1% change in the initial and ultimate healthcare cost trend rate.

See Note 7 for further details about our pension and other postretirement benefit plans.

Fair Value Measurements

We account for derivative instruments, investments held in our nuclear decommissioning trusts fund, investments held in our other special use funds, certain cash equivalents, and plan assets held in our retirement and other benefit plans at fair value on a recurring basis.  Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.  We use inputs, or assumptions that market participants would use, to determine fair market value. We utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs.  The significance of a particular input determines how the instrument is classified in a fair value hierarchy.  The determination of fair value sometimes requires subjective and complex judgment.  Our assessment of the inputs and the significance of a particular input to fair value measurement may affect the likelihoodvaluation of recovering costs in future rates orthe instruments and their placement within a fair value hierarchy.  Actual results could differ from our estimates of fair value.  See Note 1 for a future reduction in rates.discussion of accounting policies and Note 12 for fair value measurement disclosures.

Asset Retirement Obligations

We evaluatedrecognize an ARO for the Company’s disclosuresfuture decommissioning or retirement of our tangible long-lived assets for which a legal obligation exists. The ARO liability represents an estimate of the fair value of the current obligation related to regulatorydecommissioning and the retirement of those assets. ARO measurements inherently involve uncertainty in the amount and timing of settlement of the liability. We use an expected cash flow approach to measure the amount we recognize as an ARO. This approach applies probability weighting to discounted future cash flow scenarios that reflect a range of possible outcomes. The scenarios consider settlement of the ARO at the expiration of the asset’s current license or lease term and expected decommissioning dates. The fair value of an ARO is recognized in the period in which it is incurred. The associated asset retirement costs are capitalized as part of the carrying value of the long-lived asset and are depreciated over the life of the related assets. In addition, we accrete the ARO liability to reflect the passage of time. Changes in these estimates and assumptions could materially affect the amount of the recorded ARO for these assets. In accordance with GAAP accounting, specificallyAPS accrues removal costs for its regulated utility assets, even if there is no legal obligation for removal.

AROs as of December 31, 2022 are described further in Note 11.

84

MARKET AND CREDIT RISKS
Market Risks
Our operations include managing market risks related to changes in interest rates, commodity prices, investments held by our nuclear decommissioning trusts, other special use funds and benefit plan assets.
Interest Rate and Equity Risk
We have exposure to changing interest rates.  Changing interest rates will affect interest paid on variable-rate debt and the market value of fixed income securities held by our nuclear decommissioning trust, other special use funds (see Notes 12 and 18), and benefit plan assets.  The nuclear decommissioning trust, other special use funds and benefit plan assets also have risks associated with the changing market value of their equity and other non-fixed income investments.  Nuclear decommissioning and benefit plan costs are recovered in regulated electricity prices.

The tables below present contractual balances of our consolidated long-term and short-term debt at the expected maturity dates, as well as the fair value of those instruments on December 31, 2022, and 2021.  The interest rates presented in the tables below represent the weighted-average interest rates as of December 31, 2022, and 2021 (dollars in millions):
Pinnacle West – Consolidated
 Short-Term
Debt
Variable-Rate
Long-Term Debt
Fixed-Rate
Long-Term Debt
 Interest Interest Interest 
2022RatesAmountRatesAmountRatesAmount
20234.56 %$341 5.42 %$51 — $— 
2024— — 5.10 %450 3.35 %250 
2025— — — — 1.99 %800 
2026— — — — 2.55 %250 
2027— — — — 2.95 %300 
Years thereafter— — 3.96 %163 4.10 %5,580 
Total $341 $664  $7,180 
Fair value $341  $664  $5,922 

85

 Short-Term
Debt
Variable-Rate
Long-Term Debt
Fixed-Rate
Long-Term Debt
 Interest Interest Interest 
2021RatesAmountRatesAmountRatesAmount
20220.18 %$292 0.78 %$150 — $— 
2023— — — — — — 
2024— — 0.85 %150 3.35 %250 
2025— — — — 1.99 %800 
2026— — — — 2.55 %250 
Years thereafter— — 0.22 %36 3.87 %5,480 
Total $292 $336  $6,780 
Fair value $292  $336  $7,390 

The tables below present contractual balances of APS’s long-term and short-term debt at the expected maturity dates, as well as the fair value of those instruments on December 31, 2022, and 2021.  The interest rates presented in the tables below represent the weighted-average interest rates as of December 31, 2022, and 2021 (dollars in millions):
APS — Consolidated
 Short-Term
Debt
Variable-Rate
Long-Term Debt
Fixed-Rate
Long-Term Debt
 Interest Interest Interest 
2022RatesAmountRatesAmountRatesAmount
20234.56 %$325 — $— — $— 
2024— — — — 3.35 %250 
2025— — — — 3.15 %300 
2026— — — — 2.55 %250 
2027— — — — 2.95 %300 
Years thereafter— — 3.96 %163 4.10 %5,580 
Total $325 $163  $6,680 
Fair value $325  $163  $5,466 
86

 Short-Term
Debt
Variable-Rate
Long-Term Debt
Fixed-Rate
Long-Term Debt
 Interest Interest Interest 
2021RatesAmountRatesAmountRatesAmount
20220.18 %$279 — $— — $— 
2023— — — — — — 
2024— — — — 3.35 %250 
2025— — — — 3.15 %300 
2026— — — — 2.55 %250 
Years thereafter— — 0.22 %36 3.87 %5,480 
Total $279 $36 $6,280 
Fair value $279  $36  $6,898 
Commodity Price Risk
We are exposed to the impact of rate regulation onmarket fluctuations in the financial statements,commodity price and transportation costs of electricity and natural gas.  Our risk management committee, consisting of officers and key management personnel, oversees company-wide energy risk management activities to ensure compliance with our stated energy risk management policies.  We manage risks associated with these market fluctuations by utilizing various commodity instruments that may qualify as derivatives, including futures, forwards, options, and swaps.  As part of our risk management program, we use such instruments to hedge purchases and sales of electricity and natural gas.  The changes in market value of such contracts have a high correlation to price changes in the balances recordedhedged commodities.

The following table shows the net pretax changes in mark-to-market of our energy derivative positions (dollars in millions):
 December 31, 2022December 31, 2021
Mark-to-market of net positions at beginning of year$107 $(13)
Increase (decrease) in regulatory liability(11)120 
Mark-to-market of net positions at end of year$96 $107 

The table below shows the fair value of maturities of our energy derivative contracts (dollars in millions) at December 31, 2022, by maturities and regulatory developments.

We read relevant regulatory rate orders issued by the ACC for APS and other public utilitiestype of valuation that is performed to calculate the fair values, classified in Arizona, regulatory statutes, interpretations, procedural memorandums, filings made by interveners, and other publicly available information to assess the likelihood of recovery in future rates or of a future reduction in rates based on precedence of the ACC’s treatment of similar costs under similar circumstances. We evaluated the external information and compared to management’s recorded regulatory asset and liability balances for completeness.

We read management’s preliminary rate filings submitted and testimony given to the ACC regarding the 2019 Retail Rate Case filed in October 2019 and monitored activity by intervenors, the ACC and its staff. The filing is still under review with the ACC. We read the filing and related testimony to assess the likelihood of recovery in future rates or of a future reduction in ratestheir entirety based on the information available aslowest level of input that is significant to the fair value measurement.  See Note 1, “Derivative Accounting” and “Fair Value Measurements,” for more discussion of our report date.valuation methods.

Source of Fair Value20232024202520262027Total 
Fair 
Value
Observable prices provided by other external sources$70 $31 $— $— $— $101 
Prices based on unobservable inputs(14)— — — (5)
Total by maturity$56 $40 $— $— $— $96 
We evaluated management’s assessment
87

The table below shows the probabilityimpact that hypothetical price movements of recovery10% would have on the market value of our risk management assets and liabilities included on Pinnacle West’s Consolidated Balance Sheets (dollars in millions):
 December 31, 2022
Gain (Loss)
December 31, 2021
Gain (Loss)
 Price Up  10%Price Down 10%Price Up  10%Price Down 10%
Mark-to-market changes reported in:    
Regulatory asset (liability) (a)    
Electricity$12 $(12)$— $— 
Natural gas55 (55)50 (50)
Total$67 $(67)$50 $(50)
(a)These contracts are economic hedges of our forecasted purchases of natural gas and electricity.  The impact of these hypothetical price movements would substantially offset the impact that these same price movements would have on the physical exposures being hedged.  To the extent the amounts are eligible for regulatory assets or refund or future reductioninclusion in rates for regulatory liabilities based on applicable regulatory orders or precedence set by the ACC under similar circumstances. For certain regulatory assets or liabilities where management’s assessment is based on precedence established byPSA, the ACC under similar circumstances and not

specifically addressed inamounts are recorded as either a regulatory order, we also obtained a letter from internal legal counsel regarding their assessment.

/s/ Deloitte & Touche LLP

Phoenix, Arizona
February 21, 2020

We have served as the Company's auditor since 1932.



PINNACLE WEST CAPITAL CORPORATION
CONSOLIDATED STATEMENTS OF INCOME
(dollars and shares in thousands, except per share amounts)asset or liability.
 
 Year Ended December 31,
 2019 2018 2017
      
OPERATING REVENUES (NOTE 2)$3,471,209
 $3,691,247
 $3,565,296
OPERATING EXPENSES 
  
  
Fuel and purchased power1,042,237
 1,076,116
 981,301
Operations and maintenance941,616
 1,036,744
 949,107
Depreciation and amortization590,929
 582,354
 534,118
Taxes other than income taxes218,579
 212,849
 184,347
Other expenses5,888
 9,497
 6,660
Total2,799,249
 2,917,560
 2,655,533
OPERATING INCOME671,960
 773,687
 909,763
OTHER INCOME (DEDUCTIONS) 
  
  
Allowance for equity funds used during construction (Note 1)31,431
 52,319
 47,011
Pension and other postretirement non-service credits - net (Note 8)22,989
 49,791
 24,664
Other income (Note 18)50,263
 24,896
 4,006
Other expense (Note 18)(17,880) (17,966) (21,539)
Total86,803
 109,040
 54,142
INTEREST EXPENSE 
  
  
Interest charges235,251
 243,465
 219,796
Allowance for borrowed funds used during construction (Note 1)(18,528) (25,180) (22,112)
Total216,723
 218,285
 197,684
INCOME BEFORE INCOME TAXES542,040
 664,442
 766,221
INCOME TAXES (Note 5)(15,773) 133,902
 258,272
NET INCOME557,813
 530,540
 507,949
Less: Net income attributable to noncontrolling interests (Note 19)19,493
 19,493
 19,493
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS$538,320
 $511,047
 $488,456
      
WEIGHTED-AVERAGE COMMON SHARES OUTSTANDING — BASIC112,443
 112,129
 111,839
WEIGHTED-AVERAGE COMMON SHARES OUTSTANDING — DILUTED112,758
 112,550
 112,367
      
EARNINGS PER WEIGHTED-AVERAGE COMMON SHARE OUTSTANDING 
  
  
Net income attributable to common shareholders — basic$4.79
 $4.56
 $4.37
Net income attributable to common shareholders — diluted$4.77
 $4.54
 $4.35

The accompanying notes are an integral part of the financial statements.

PINNACLE WEST CAPITAL CORPORATION
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
(dollars in thousands)Credit Risk
 
We are exposed to losses in the event of non-performance or non-payment by counterparties.  See Note 15 for a discussion of our credit valuation adjustment policy.


 Year Ended December 31,
 2019 2018 2017
      
NET INCOME$557,813
 $530,540
 $507,949
      
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX 
  
  
Derivative instruments: 
  
  
Net unrealized loss, net of tax benefit (expense) of $0, ($78), and $24 (Note 17)
 (78) (35)
Reclassification of net realized loss, net of tax benefit of $375, $473, and $1,294 (Note 17)1,137
 1,527
 2,225
Pension and other postretirement benefits activity, net of tax benefit (expense) of $3,452, ($1,585), and $693 (Note 8)(10,525) 4,397
 (3,370)
Total other comprehensive income (loss)(9,388) 5,846
 (1,180)
      
COMPREHENSIVE INCOME548,425
 536,386
 506,769
Less: Comprehensive income attributable to noncontrolling interests19,493
 19,493
 19,493
      
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS$528,932
 $516,893
 $487,276
ITEM 7A.  QUANTITATIVE AND QUALITATIVE
DISCLOSURES ABOUT MARKET RISK
 
The accompanying notes are an integral partSee “Market and Credit Risks” in Item 7 above for a discussion of the financial statements.quantitative and qualitative disclosures about market risks.


88


PINNACLE WEST CAPITAL CORPORATION
CONSOLIDATED BALANCE SHEETS
(dollars in thousands)ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
 
INDEX TO FINANCIAL STATEMENTS AND
 December 31,
 2019 2018
ASSETS 
  
    
CURRENT ASSETS 
  
Cash and cash equivalents$10,283
 $5,766
Customer and other receivables266,426
 267,887
Accrued unbilled revenues128,165
 137,170
Allowance for doubtful accounts(8,171) (4,069)
Materials and supplies (at average cost)331,091
 269,065
Fossil fuel (at average cost)14,829
 25,029
Income tax receivable (Note 5)21,727
 
Assets from risk management activities (Note 17)515
 1,113
Deferred fuel and purchased power regulatory asset (Note 4)70,137
 37,164
Other regulatory assets (Note 4)133,070
 129,738
Other current assets61,958
 56,128
Total current assets1,030,030
 924,991
INVESTMENTS AND OTHER ASSETS 
  
Nuclear decommissioning trust (Notes 14 and 20)1,010,775
 851,134
Other special use funds (Notes 14 and 20)245,095
 236,101
Other assets96,953
 103,247
Total investments and other assets1,352,823
 1,190,482
PROPERTY, PLANT AND EQUIPMENT (Notes 1, 7 and 10) 
  
Plant in service and held for future use19,836,292
 18,736,628
Accumulated depreciation and amortization(6,637,857) (6,366,014)
Net13,198,435
 12,370,614
Construction work in progress808,133
 1,170,062
Palo Verde sale leaseback, net of accumulated depreciation of $249,144 and $245,275 (Note 19)101,906
 105,775
Intangible assets, net of accumulated amortization of $647,276 and $591,202290,564
 262,902
Nuclear fuel, net of accumulated amortization of $137,330 and $137,850123,500
 120,217
Total property, plant and equipment14,522,538
 14,029,570
DEFERRED DEBITS 
  
Regulatory assets (Notes 1, 4 and 5)1,304,073
 1,342,941
Operating lease right-of-use assets (Note 9)145,813
 
Assets for other postretirement benefits (Note 8)90,570
 46,906
Other33,400
 129,312
Total deferred debits1,573,856
 1,519,159
TOTAL ASSETS$18,479,247
 $17,664,202
FINANCIAL STATEMENT SCHEDULES
 
The accompanying notes are an integral part of the financial statements.






PINNACLE WEST CAPITAL CORPORATION
CONSOLIDATED BALANCE SHEETS
(dollars in thousands)
 December 31,
 2019 2018
LIABILITIES AND EQUITY 
  
CURRENT LIABILITIES 
  
Accounts payable$346,448
 $277,336
Accrued taxes144,899
 154,819
Accrued interest53,534
 61,107
Common dividends payable87,982
 82,675
Short-term borrowings (Note 6)114,675
 76,400
Current maturities of long-term debt (Note 7)800,000
 500,000
Customer deposits64,908
 91,174
Liabilities from risk management activities (Note 17)38,946
 35,506
Liabilities for asset retirements (Note 12)11,025
 19,842
Operating lease liabilities (Note 9)12,713
 
Regulatory liabilities (Note 4)234,912
 165,876
Other current liabilities168,323
 184,229
Total current liabilities2,078,365
 1,648,964
LONG-TERM DEBT LESS CURRENT MATURITIES (Note 7)4,832,558
 4,638,232
DEFERRED CREDITS AND OTHER 
  
Deferred income taxes (Note 5)1,992,339
 1,807,421
Regulatory liabilities (Notes 1, 4, 5 and 8)2,267,835
 2,325,976
Liabilities for asset retirements (Note 12)646,193
 706,703
Liabilities for pension benefits (Note 8)280,185
 443,170
Liabilities from risk management activities (Note 17)33,186
 24,531
Customer advances215,330
 137,153
Coal mine reclamation165,695
 212,785
Deferred investment tax credit196,468
 200,405
Unrecognized tax benefits (Note 5)6,189
 22,517
Operating lease liabilities (Note 9)51,872
 
Other159,844
 147,640
Total deferred credits and other6,015,136
 6,028,301
COMMITMENTS AND CONTINGENCIES (SEE NOTES)


 


EQUITY 
  
Common stock, no par value; authorized 150,000,000 shares, 112,540,126 and 112,159,896 issued at respective dates2,659,561
 2,634,265
Treasury stock at cost; 103,546 shares at end of 2019 and 58,135 shares at end of 2018(9,427) (4,825)
Total common stock2,650,134
 2,629,440
Retained earnings2,837,610
 2,641,183
Accumulated other comprehensive loss (Note 21)(57,096) (47,708)
Total shareholders’ equity5,430,648
 5,222,915
Noncontrolling interests (Note 19)122,540
 125,790
Total equity5,553,188
 5,348,705
TOTAL LIABILITIES AND EQUITY$18,479,247
 $17,664,202
The accompanying notes are an integral part of the financial statements.

PINNACLE WEST CAPITAL CORPORATION
CONSOLIDATED STATEMENTS OF CASH FLOWS
(dollars in thousands)
 Year Ended December 31,
 2019 2018 2017
CASH FLOWS FROM OPERATING ACTIVITIES 
  
  
Net Income$557,813
 $530,540
 $507,949
Adjustments to reconcile net income to net cash provided by operating activities: 
  
  
Depreciation and amortization including nuclear fuel664,140
 650,955
 610,629
Deferred fuel and purchased power(82,481) (78,277) (48,405)
Deferred fuel and purchased power amortization49,508
 116,750
 (14,767)
Allowance for equity funds used during construction(31,431) (52,319) (47,011)
Deferred income taxes(1,479) 117,355
 248,164
Deferred investment tax credit(3,938) (5,170) (4,587)
Change in derivative instruments fair value
 
 (373)
Stock compensation18,376
 19,547
 20,502
Changes in current assets and liabilities: 
  
  
Customer and other receivables(12,789) 37,530
 (93,797)
Accrued unbilled revenues9,005
 (24,736) (4,485)
Materials, supplies and fossil fuel(51,826) (6,103) (6,683)
Income tax receivable(21,727) 
 3,751
Other current assets(3,507) 33,844
 (10,580)
Accounts payable50,641
 (14,602) (23,769)
Accrued taxes(9,920) 6,597
 9,982
Other current liabilities(84,651) 28,174
 19,154
Change in margin and collateral accounts — assets(247) 143
 (300)
Change in margin and collateral accounts — liabilities(125) (2,211) (533)
Change in unrecognized tax benefits2,704
 (1,235) 5,891
Change in long-term regulatory liabilities124,221
 (109,284) 45,764
Change in other long-term assets(82,895) 78,604
 (68,480)
Change in other long-term liabilities(132,666) (48,958) (29,980)
Net cash flow provided by operating activities956,726
 1,277,144
 1,118,036
CASH FLOWS FROM INVESTING ACTIVITIES 
  
  
Capital expenditures(1,191,447) (1,178,169) (1,408,774)
Contributions in aid of construction70,693
 27,716
 23,708
Allowance for borrowed funds used during construction(18,528) (25,180) (22,112)
Proceeds from nuclear decommissioning trust sales and other special use funds719,034
 653,033
 542,246
Investment in nuclear decommissioning trust and other special use funds(722,181) (672,165) (544,527)
Other11,452
 1,941
 (19,078)
Net cash flow used for investing activities(1,130,977) (1,192,824) (1,428,537)
CASH FLOWS FROM FINANCING ACTIVITIES 
  
  
Issuance of long-term debt1,092,188
 445,245
 848,239
Repayment of long-term debt(600,000) (182,000) (125,000)
Short-term borrowings and (repayments) — net54,275
 (7,000) (107,800)
Short-term debt borrowings under revolving credit facility49,000
 45,000
 58,000
Short-term debt repayments under revolving credit facility(65,000) (57,000) (32,000)
Dividends paid on common stock(329,643) (308,892) (289,793)
Common stock equity issuance and purchases - net692
 (5,055) (13,390)
Distributions to noncontrolling interests(22,744) (22,744) (22,744)
Net cash flow provided by (used for) financing activities178,768
 (92,446) 315,512
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS4,517
 (8,126) 5,011
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR5,766
 13,892
 8,881
CASH AND CASH EQUIVALENTS AT END OF YEAR$10,283
 $5,766
 $13,892
The accompanying notes are an integral part of the financial statements.

PINNACLE WEST CAPITAL CORPORATION
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
(dollars in thousands, except per share amounts)
 Common Stock Treasury Stock Retained Earnings Accumulated Other Comprehensive Income (Loss) Noncontrolling Interests Total
 Shares Amount Shares Amount        
Balance, December 31, 2016111,392,053
 $2,596,030
 (55,317) $(4,133) $2,255,547
 $(43,822) $132,290
 $4,935,912
                
Net income  
   
 488,456
 
 19,493
 507,949
Other comprehensive loss  
   
 
 (1,180) 
 (1,180)
Dividends on common stock ($2.70 per share)  
   
 (301,492) 
 
 (301,492)
Issuance of common stock424,117
 18,775
   
 
 
 
 18,775
Purchase of treasury stock (a)  
 (216,911) (17,755) 
 
 
 (17,755)
Reissuance of treasury stock for stock-based compensation and other  
 207,765
 16,264
 
 
 
 16,264
Capital activities by noncontrolling interests  
   
 
 
 (22,743) (22,743)
Balance, December 31, 2017111,816,170
 2,614,805
 (64,463) (5,624) 2,442,511
 (45,002) 129,040
 5,135,730
                
Net income  
   
 511,047
 
 19,493
 530,540
Other comprehensive income  
   
 
 5,846
 
 5,846
Dividends on common stock ($2.87 per share)  
   
 (320,927) 
 
 (320,927)
Issuance of common stock343,726
 19,460
   
 
 
 
 19,460
Purchase of treasury stock (a)  
 (129,903) (10,338) 
 
 
 (10,338)
Reissuance of treasury stock for stock-based compensation and other  
 136,231
 11,137
 
 
 
 11,137
Capital activities by noncontrolling interests  
   
 
 
 (22,743) (22,743)
Reclassification of income tax effects related to new tax reform (b)  
   
 8,552
 (8,552) 
 
Balance, December 31, 2018112,159,896
 2,634,265
 (58,135) (4,825) 2,641,183
 (47,708) 125,790
 5,348,705
                
Net income  
   
 538,320
 
 19,493
 557,813
Other comprehensive loss  
   
 
 (9,388) 
 (9,388)
Dividends on common stock ($3.04 per share)  
   
 (341,893) 
 
 (341,893)
Issuance of common stock380,230
 25,296
   
 
 
 
 25,296
Purchase of treasury stock (a)  
 (121,493) (11,202) 
 
 
 (11,202)
Reissuance of treasury stock for stock-based compensation and other  
 76,082
 6,600
 
 
 
 6,600
Capital activities by noncontrolling interests  
   
 
 
 (22,743) (22,743)
Balance, December 31, 2019112,540,126
 $2,659,561
 (103,546) $(9,427) $2,837,610
 $(57,096) $122,540
 $5,553,188
(a)    Primarily represents shares of common stock withheld from certain stock awards for tax purposes.
Page
(b)In 2018, the Company adopted new accounting guidance

The accompanying notes are an integral part

89


MANAGEMENT’S REPORT ON INTERNAL CONTROL
OVER FINANCIAL REPORTING
(ARIZONA PUBLIC SERVICE COMPANY)PINNACLE WEST CAPITAL CORPORATION)

 
Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f), for Arizona Public Service Company.Pinnacle West Capital Corporation.  Management conducted an evaluation of the effectiveness of our internal control over financial reporting based on the framework in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.  Based on our evaluation under the framework in Internal Control — Integrated Framework (2013), our management concluded that our internal control over financial reporting was effective as of December 31, 2019.2022.  The effectiveness of our internal control over financial reporting as of December 31, 20192022, has been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their report which is included herein and also relates to the Company’s consolidated financial statements.
 
February 21, 202027, 2023


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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Shareholders and the Board of Directors of
Arizona Public Service Company
 20222021
Net cash flow provided by operating activities$1,230 $865 
Net cash flow used for investing activities(1,549)(1,391)
Net cash flow provided by financing activities314 478 
Net decrease in cash and cash equivalents$(5)$(48)

Operating Cash Flows
2022 Compared with 2021. Pinnacle West’s consolidated net cash provided by operating activities was $1,242 million in 2022 compared to $860 million in 2021, an increase of $382 million in net cash provided primarily due to $542 million higher cash receipts from electric revenues, $47 million lower payments for operations and maintenance costs, $100 million lower pension contributions and $79 million other changes in working capital, partially offset by $321 million higher fuel and purchased power costs, $47 million higher income taxes and $18 million higher interest payments. The difference between APS’s and Pinnacle West’s net cash provided by operating activities primarily relates to APS’s income tax cash payments to Pinnacle West in 2021.

Retirement plans and other postretirement benefits. Pinnacle West sponsors a qualified defined benefit pension plan and a non-qualified supplemental excess benefit retirement plan for the employees of Pinnacle West and our subsidiaries. Pinnacle West also sponsors other postretirement benefit plans for the employees of Pinnacle West and its subsidiaries. The requirements of the Employee Retirement Income Security Act of 1974 (“ERISA”) require us to contribute a minimum amount to the qualified plan.  We contribute at least the minimum amount required under ERISA regulations, but no more than the maximum tax-deductible amount.  Under ERISA, the qualified pension plan was estimated to be 112% funded as of January 1, 2023, and was 139% as of January 1, 2022. Future year contribution amounts are dependent on plan asset performance and plan actuarial assumptions.  We made contributions to our pension plan totaling $0 million in 2022, $100 million in 2021, and $100 million in 2020.  The minimum required contributions for the pension plan are zero for the next three years and we do not expect to make any voluntary contributions in 2023, 2024 or 2025. Regarding contributions to our other postretirement benefit
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plan, we did not make any contributions in 2022 or 2021 and do not expect to make any contributions in 2023, 2024 or 2025. The Company was reimbursed $26 million in 2022, $24 million in 2021, and $26 million in 2020 for prior years retiree medical claims from the other postretirement benefit plan trust assets. We continually monitor financial market volatility and its impact on our retirement plans and other postretirement benefits, but we believe our liability driven investment strategy helps to minimize the impact of market volatility on our plan’s funded status. For instance, our pension plan’s funded status, as measured for accounting principles generally accepted in the United States of America (“GAAP”) purposes, was 106% funded as of December 31, 2022, and our postretirement benefit plans were 159% funded, as measured for GAAP purposes at December 31, 2022. See Note 7 for additional details.

The CARES Act allows employers to defer payments of the employer share of Social Security payroll taxes that would have otherwise been owed from March 27, 2020, through December 31, 2020. We deferred the cash payment of the employer’s portion of Social Security payroll taxes for the period July 1, 2020, through December 31, 2020, that was approximately $18 million. As of December 31, 2022, we have paid this cash deferral in full.

Investing Cash Flows

2022 Compared with 2021. Pinnacle West’s consolidated net cash used for investing activities was $1,618 million in 2022 compared to $1,387 million in 2021, an increase of $231 million in net cash used primarily related to increased capital expenditures and BCE investment activity.

Capital Expenditures.  The following table summarizes the estimated capital expenditures for the next three years:
Capital Expenditures
(dollars in millions)
Estimated for the Year Ended
December 31,
 202320242025
APS
Generation:
Clean:
Nuclear Generation$120 $120 $120 
Renewables and Energy Storage Systems (“ESS”) (a)240 345 400 
Other Generation (b)265 245 245 
Distribution520 530 530 
Transmission260 300 300 
Other (c)265 260 255 
Total APS$1,670 $1,800 $1,850 
(a)APS Solar Communities program, energy storage, renewable projects, and other clean energy projects.
(b)Includes generation environmental projects.
(c)Primarily information systems and facilities projects.
The table above does not include capital expenditures related to BCE projects.
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Generation capital expenditures are comprised of various additions and improvements to APS’s clean resources, including nuclear plants, renewables and ESS. Generation capital expenditures also include improvements to existing fossil plants. Examples of the types of projects included in the forecast of generation capital expenditures are additions of renewables and energy storage, and upgrades and capital replacements of various nuclear and fossil power plant equipment, such as turbines, boilers, and environmental equipment.  We are monitoring the status of environmental matters, which, depending on their final outcome, could require modification to our planned environmental expenditures.

Distribution and transmission capital expenditures are comprised of infrastructure additions and upgrades, capital replacements, and new customer construction.  Examples of the types of projects included in the forecast include power lines, substations, and line extensions to new residential and commercial developments.

Capital expenditures will be funded with internally generated cash and external financings, which may include issuances of long-term debt and Pinnacle West common stock.
Financing Cash Flows and Liquidity
2022 Compared with 2021. Pinnacle West’s consolidated net cash provided by financing activities was $371 million in 2022 compared to $477 million 2021, a decrease of $106 million in net cash provided primarily due to $150 million higher long-term debt repayments, a net decrease in short-term borrowings of $74 million and higher dividend payments of $9 million, partially offset by $129 million in higher issuances of long-term debt.

APS’s consolidated net cash provided by financing activities was $314 million in 2022 compared to $478 million in 2021, a decrease of $164 million in net cash provided primarily due to a net decrease in short-term borrowings of $232 million and higher dividend payments of $9 million, partially offset by $78 million in higher issuances of long-term debt.

Significant Financing Activities.  On December 14, 2022, the Pinnacle West Board of Directors declared a dividend of $0.865 per share of common stock, payable on March 1, 2023, to shareholders of record on February 1, 2023. During 2022, Pinnacle West increased its indicated annual dividend from $3.40 per share to $3.46 per share. For the year ended December 31, 2022, Pinnacle West’s total dividends paid per share of common stock were $3.42 per share, which resulted in dividend payments of $379 million.

Available Credit FacilitiesPinnacle West and APS maintain committed revolving credit facilities in order to enhance liquidity and provide credit support for their commercial paper. See Note 5 for more information on available credit facilities.

Other Financing Matters.  See Note 15 for information related to the change in our margin and collateral accounts.
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Debt Provisions
Pinnacle West’s and APS’s debt covenants related to their respective bank financing arrangements include maximum debt to capitalization ratios.  Pinnacle West and APS comply with these covenants.  For both Pinnacle West and APS, these covenants require that the ratio of consolidated debt to total consolidated capitalization not exceed 65%.  At December 31, 2022, the ratio was approximately 58% for Pinnacle West and 51% for APS.  Failure to comply with such covenant levels would result in an event of default which, generally speaking, would require the immediate repayment of the debt subject to the covenants and could “cross-default” other debt.  See further discussion of “cross-default” provisions below.
Neither Pinnacle West’s nor APS’s financing agreements contain “rating triggers” that would result in an acceleration of the required interest and principal payments in the event of a rating downgrade.  However, our bank credit agreements contain a pricing grid in which the interest rates we pay for borrowings thereunder are determined by our current credit ratings.
All of Pinnacle West’s loan agreements contain “cross-default” provisions that would result in defaults and the potential acceleration of payment under these loan agreements if Pinnacle West or APS were to default under certain other material agreements.  All of APS’s bank agreements contain “cross-default” provisions that would result in defaults and the potential acceleration of payment under these bank agreements if APS were to default under certain other material agreements.  Pinnacle West and APS do not have a material adverse change restriction for credit facility borrowings.

On December 17, 2020, the ACC issued a financing order that, subject to specified parameters and procedures, increased APS’s long-term debt limit from $5.9 billion to $7.5 billion, and authorized APS’s short-term debt authorization equal to the sum of (i) 7% of APS’s capitalization, and (ii) $500 million  (which is required to be used for costs relating to purchases of natural gas and power). On December 15, 2022, the ACC issued a financing order approving APS’s application filed April 6, 2022 requesting to increase the long-term debt limit from $7.5 billion to $8.0 billion and to exclude financing lease PPAs from the definition of long-term debt for purposes of the ACC financing orders. See Note 6 for further discussions of liquidity matters.

Credit Ratings

The ratings of securities of Pinnacle West and APS as of February 15, 2023, are shown below. We are disclosing these credit ratings to enhance understanding of our cost of short-term and long-term capital and our ability to access the markets for liquidity and long-term debt. The ratings reflect the respective views of the rating agencies, from which an explanation of the significance of their ratings may be obtained. There is no assurance that these ratings will continue for any given period. The ratings may be revised or withdrawn entirely by the rating agencies if, in their respective judgments, circumstances so warrant. Any downward revision or withdrawal may adversely affect the market price of Pinnacle West’s or APS’s securities and/or result in an increase in the cost of, or limit access to, capital. Such revisions may also result in substantial additional cash or other collateral requirements related to certain derivative instruments, insurance policies, natural gas transportation, fuel supply, and other energy-related contracts. At this time, we believe we have sufficient available liquidity resources to respond to a potential downward revision to our credit ratings.
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Moody’sStandard & Poor’sFitch
Pinnacle West
Corporate credit ratingBaa1BBB+BBB+
Senior unsecuredBaa1BBBBBB+
Commercial paperP-2A-2F2
OutlookNegativeNegativeNegative
APS
Corporate credit ratingA3BBB+BBB+
Senior unsecuredA3BBB+A-
Commercial paperP-2A-2F2
OutlookNegativeNegativeNegative
Contractual Obligations

Pinnacle West has contractual obligations and other commitments that will need to be funded in the future, in addition to its capital expenditure programs. Material contractual obligations and other commitments are as follows:

Pinnacle West and APS have material long-term debt obligations that mature at various dates through 2050 and bear interest principally at fixed rates. Interest on variable-rate long-term debt is determined by using average rates at December 31, 2022. See Note 6.

Pinnacle West and APS maintain committed revolving credit facilities. See Note 5 for short-term debt details.

Fuel and purchased power commitments include purchases of coal, electricity, natural gas, renewable energy, nuclear fuel, and natural gas transportation. See Notes 3 and 10. Purchase obligations include capital expenditures and other obligations. See Note 10. Commitments related to purchased power lease contracts are also considered fuel and purchased power commitments. See Note 8.

APS holds certain contracts to purchase renewable energy credits in compliance with the RES. See Notes 3 and 10.

APS is required to make payments to the noncontrolling interests related to the Palo Verde sale leaseback through 2033. See Note 17.
CRITICAL ACCOUNTING POLICIES
In preparing the financial statements in accordance with GAAP, management must often make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses, and related disclosures at the date of the financial statements and during the reporting period.  Some of those judgments can be subjective and complex, and actual results could differ from those estimates.  We consider the following accounting policies to be our most critical because of the uncertainties, judgments and complexities of the underlying accounting standards and operations involved.
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Regulatory Accounting

Regulatory accounting allows for the actions of regulators, such as the ACC and FERC, to be reflected in our financial statements.  Their actions may cause us to capitalize costs that would otherwise be included as an expense in the current period by unregulated companies.  Regulatory assets represent incurred costs that have been deferred because they are probable of future recovery in customer rates.  Regulatory liabilities generally represent amounts collected in rates to recover costs expected to be incurred in the future or amounts collected in excess of costs incurred and are refundable to customers. Management judgments include continually assessing the likelihood of future recovery of regulatory assets and/or a disallowance of part of the cost of recently completed plant, by considering factors such as applicable regulatory environment changes and recent rate orders to other regulated entities in the same jurisdiction.  This determination reflects the current political and regulatory climate in Arizona and is subject to change in the future.  If future recovery of costs ceases to be probable, the assets would be written off as a charge in current period earnings, except for pension benefits, which would be charged to OCI and result in lower future earnings.  Management judgments also include assessing the impact of potential ACC or FERC Commission-ordered refunds to customers on regulatory liabilities. We had $1,822 million of regulatory assets and $2,333 million of regulatory liabilities on the Consolidated Balance Sheets at December 31, 2022. See Notes 1 and 3 for more information.

Pensions and Other Postretirement Benefit Accounting

Changes in our actuarial assumptions used in calculating our pension and other postretirement benefit assets, liabilities and expense can have a significant impact on our earnings and financial position. We review these assumptions on an annual basis and adjust them as necessary. The most relevant actuarial assumptions are the discount rate, the expected long-term rate of return on plan assets (“EROA”), and the assumed healthcare cost trend rates. Differences between these actuarial assumptions and actual plan results may create volatility in pension and other postretirement benefit expense. To reduce this volatility, these differences are accumulated and amortized (subject to a corridor of 10% of the greater of plan assets or obligations) as part of the expense over a period of approximately 11 years. Following are the most relevant actuarial assumptions:

Discount Rate. The discount rate is used to measure the plan liability and net periodic cost. For this assumption, we utilize a yield curve produced by our actuary as of December 31st and employ their projections of the future benefit payments to estimate the projected benefit obligation for each plan. This process also yields a single equivalent discount rate that produces the same present value for the projection of estimated benefit payments that is generated by discounting each year’s benefit payments by a spot rate to that year. The spot rates are derived from a yield curve composed of domestic AA rated corporate bonds.

EROA. The EROA is used to estimate earnings on invested funds over the long-term. For this assumption we consider historical experience and future expectations of asset classes utilized in the portfolio.

Healthcare Cost Trend Rates. We consider past performance and forecasts of health care costs and our actuary provides the Company with a medical trend recommendation based on national medical trend, historical claims performance, benchmarking, and plan design changes.

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The following chart reflects the sensitivities that a change in certain actuarial assumptions would have had on the December 31, 2022 reported pension assets and liabilities on the Consolidated Balance Sheets and our 2022 reported pension expense, after consideration of amounts capitalized or billed to electric plant participants, on the Consolidated Statements of Income (dollars in millions):
 Increase (Decrease)
Actuarial Assumption (a)Impact on
Pension
Plans
Impact on
Pension
Expense
Discount rate (b):  
Increase 1%$(238)$
Decrease 1%279 13 
EROA:
Increase 1%— (27)
Decrease 1%— 27 
(a)Each fluctuation assumes that the other assumptions of the calculation are held constant while the rates are changed by one percentage point.
(b)In general, changes in the discount rate will not typically have symmetrical effects for increases and decreases of the rate. Further, a 1% change in a low discount rate environment will have a larger impact than a 1% change in a high discount rate environment. Therefore, the discount rate sensitivities above cannot necessarily be extrapolated. Additionally, the Pension Plan utilizes a liability-driven strategy for its pension asset portfolio, and the obligation and expense sensitivities shown above do not reflect the offsetting impact that a change in interest rates may have on pension asset values.

The following chart reflects the sensitivities that a change in certain actuarial assumptions would have had on the December 31, 2022, other postretirement benefit obligation on the Pinnacle West’s Consolidated Balance Sheets and our 2022 reported other postretirement benefit expense, after consideration of amounts capitalized or billed to electric plant participants, on Pinnacle West’s Consolidated Statements of Income (dollars in millions): 
 Increase (Decrease)
Actuarial Assumption (a)Impact on Other
Postretirement 
Benefit Plans
Impact on Other
Postretirement
Benefit Expense
Discount rate (b):  
Increase 1%$(39)$(3)
Decrease 1%46 
Healthcare cost trend rate (c):
Increase 1%43 
Decrease 1%(36)(6)
EROA – pretax:
Increase 1%— (7)
Decrease 1%— 
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(a)Each fluctuation assumes that the other assumptions of the calculation are held constant while the rates are changed by one percentage point.
(b)In general, changes in the discount rate will not typically have symmetrical effects for increases and decreases of the rate. Further, a 1% change in a low discount rate environment will have a larger impact than a 1% change in a high discount rate environment. Therefore, the discount rate sensitivities above cannot necessarily be extrapolated.
(c)This assumes a 1% change in the initial and ultimate healthcare cost trend rate.

See Note 7 for further details about our pension and other postretirement benefit plans.

Fair Value Measurements

We account for derivative instruments, investments held in our nuclear decommissioning trusts fund, investments held in our other special use funds, certain cash equivalents, and plan assets held in our retirement and other benefit plans at fair value on a recurring basis.  Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.  We use inputs, or assumptions that market participants would use, to determine fair market value. We utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs.  The significance of a particular input determines how the instrument is classified in a fair value hierarchy.  The determination of fair value sometimes requires subjective and complex judgment.  Our assessment of the inputs and the significance of a particular input to fair value measurement may affect the valuation of the instruments and their placement within a fair value hierarchy.  Actual results could differ from our estimates of fair value.  See Note 1 for a discussion of accounting policies and Note 12 for fair value measurement disclosures.

Asset Retirement Obligations

We recognize an ARO for the future decommissioning or retirement of our tangible long-lived assets for which a legal obligation exists. The ARO liability represents an estimate of the fair value of the current obligation related to decommissioning and the retirement of those assets. ARO measurements inherently involve uncertainty in the amount and timing of settlement of the liability. We use an expected cash flow approach to measure the amount we recognize as an ARO. This approach applies probability weighting to discounted future cash flow scenarios that reflect a range of possible outcomes. The scenarios consider settlement of the ARO at the expiration of the asset’s current license or lease term and expected decommissioning dates. The fair value of an ARO is recognized in the period in which it is incurred. The associated asset retirement costs are capitalized as part of the carrying value of the long-lived asset and are depreciated over the life of the related assets. In addition, we accrete the ARO liability to reflect the passage of time. Changes in these estimates and assumptions could materially affect the amount of the recorded ARO for these assets. In accordance with GAAP accounting, APS accrues removal costs for its regulated utility assets, even if there is no legal obligation for removal.

AROs as of December 31, 2022 are described further in Note 11.

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MARKET AND CREDIT RISKS
Market Risks
Our operations include managing market risks related to changes in interest rates, commodity prices, investments held by our nuclear decommissioning trusts, other special use funds and benefit plan assets.
Interest Rate and Equity Risk
We have exposure to changing interest rates.  Changing interest rates will affect interest paid on variable-rate debt and the market value of fixed income securities held by our nuclear decommissioning trust, other special use funds (see Notes 12 and 18), and benefit plan assets.  The nuclear decommissioning trust, other special use funds and benefit plan assets also have risks associated with the changing market value of their equity and other non-fixed income investments.  Nuclear decommissioning and benefit plan costs are recovered in regulated electricity prices.

The tables below present contractual balances of our consolidated long-term and short-term debt at the expected maturity dates, as well as the fair value of those instruments on December 31, 2022, and 2021.  The interest rates presented in the tables below represent the weighted-average interest rates as of December 31, 2022, and 2021 (dollars in millions):
Pinnacle West – Consolidated
 Short-Term
Debt
Variable-Rate
Long-Term Debt
Fixed-Rate
Long-Term Debt
 Interest Interest Interest 
2022RatesAmountRatesAmountRatesAmount
20234.56 %$341 5.42 %$51 — $— 
2024— — 5.10 %450 3.35 %250 
2025— — — — 1.99 %800 
2026— — — — 2.55 %250 
2027— — — — 2.95 %300 
Years thereafter— — 3.96 %163 4.10 %5,580 
Total $341 $664  $7,180 
Fair value $341  $664  $5,922 

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 Short-Term
Debt
Variable-Rate
Long-Term Debt
Fixed-Rate
Long-Term Debt
 Interest Interest Interest 
2021RatesAmountRatesAmountRatesAmount
20220.18 %$292 0.78 %$150 — $— 
2023— — — — — — 
2024— — 0.85 %150 3.35 %250 
2025— — — — 1.99 %800 
2026— — — — 2.55 %250 
Years thereafter— — 0.22 %36 3.87 %5,480 
Total $292 $336  $6,780 
Fair value $292  $336  $7,390 

The tables below present contractual balances of APS’s long-term and short-term debt at the expected maturity dates, as well as the fair value of those instruments on December 31, 2022, and 2021.  The interest rates presented in the tables below represent the weighted-average interest rates as of December 31, 2022, and 2021 (dollars in millions):
APS — Consolidated
 Short-Term
Debt
Variable-Rate
Long-Term Debt
Fixed-Rate
Long-Term Debt
 Interest Interest Interest 
2022RatesAmountRatesAmountRatesAmount
20234.56 %$325 — $— — $— 
2024— — — — 3.35 %250 
2025— — — — 3.15 %300 
2026— — — — 2.55 %250 
2027— — — — 2.95 %300 
Years thereafter— — 3.96 %163 4.10 %5,580 
Total $325 $163  $6,680 
Fair value $325  $163  $5,466 
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 Short-Term
Debt
Variable-Rate
Long-Term Debt
Fixed-Rate
Long-Term Debt
 Interest Interest Interest 
2021RatesAmountRatesAmountRatesAmount
20220.18 %$279 — $— — $— 
2023— — — — — — 
2024— — — — 3.35 %250 
2025— — — — 3.15 %300 
2026— — — — 2.55 %250 
Years thereafter— — 0.22 %36 3.87 %5,480 
Total $279 $36 $6,280 
Fair value $279  $36  $6,898 
Commodity Price Risk
We are exposed to the impact of market fluctuations in the commodity price and transportation costs of electricity and natural gas.  Our risk management committee, consisting of officers and key management personnel, oversees company-wide energy risk management activities to ensure compliance with our stated energy risk management policies.  We manage risks associated with these market fluctuations by utilizing various commodity instruments that may qualify as derivatives, including futures, forwards, options, and swaps.  As part of our risk management program, we use such instruments to hedge purchases and sales of electricity and natural gas.  The changes in market value of such contracts have a high correlation to price changes in the hedged commodities.

The following table shows the net pretax changes in mark-to-market of our energy derivative positions (dollars in millions):
 December 31, 2022December 31, 2021
Mark-to-market of net positions at beginning of year$107 $(13)
Increase (decrease) in regulatory liability(11)120 
Mark-to-market of net positions at end of year$96 $107 

The table below shows the fair value of maturities of our energy derivative contracts (dollars in millions) at December 31, 2022, by maturities and by the type of valuation that is performed to calculate the fair values, classified in their entirety based on the lowest level of input that is significant to the fair value measurement.  See Note 1, “Derivative Accounting” and “Fair Value Measurements,” for more discussion of our valuation methods.
Source of Fair Value20232024202520262027Total 
Fair 
Value
Observable prices provided by other external sources$70 $31 $— $— $— $101 
Prices based on unobservable inputs(14)— — — (5)
Total by maturity$56 $40 $— $— $— $96 

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The table below shows the impact that hypothetical price movements of 10% would have on the market value of our risk management assets and liabilities included on Pinnacle West’s Consolidated Balance Sheets (dollars in millions):
 December 31, 2022
Gain (Loss)
December 31, 2021
Gain (Loss)
 Price Up  10%Price Down 10%Price Up  10%Price Down 10%
Mark-to-market changes reported in:    
Regulatory asset (liability) (a)    
Electricity$12 $(12)$— $— 
Natural gas55 (55)50 (50)
Total$67 $(67)$50 $(50)
(a)These contracts are economic hedges of our forecasted purchases of natural gas and electricity.  The impact of these hypothetical price movements would substantially offset the impact that these same price movements would have on the physical exposures being hedged.  To the extent the amounts are eligible for inclusion in the PSA, the amounts are recorded as either a regulatory asset or liability.
Credit Risk
We are exposed to losses in the event of non-performance or non-payment by counterparties.  See Note 15 for a discussion of our credit valuation adjustment policy.


ITEM 7A.  QUANTITATIVE AND QUALITATIVE
DISCLOSURES ABOUT MARKET RISK
See “Market and Credit Risks” in Item 7 above for a discussion of quantitative and qualitative disclosures about market risks.

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ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
INDEX TO FINANCIAL STATEMENTS AND
FINANCIAL STATEMENT SCHEDULES
Page

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MANAGEMENT’S REPORT ON INTERNAL CONTROL
OVER FINANCIAL REPORTING
(PINNACLE WEST CAPITAL CORPORATION)

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f), for Pinnacle West Capital Corporation.  Management conducted an evaluation of the effectiveness of our internal control over financial reporting based on the framework in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.  Based on our evaluation under the framework in Internal Control — Integrated Framework (2013), our management concluded that our internal control over financial reporting was effective as of December 31, 2022.  The effectiveness of our internal control over financial reporting as of December 31, 2022, has been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their report which is included herein and also relates to the Company’s consolidated financial statements.
February 27, 2023

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Shareholders and the Board of Directors of
Pinnacle West Capital Corporation
Phoenix, Arizona

Opinions on the Financial Statements and Internal Control over Financial Reporting

We have audited the accompanying consolidated balance sheets of Arizona Public Service CompanyPinnacle West Capital Corporation and subsidiaries (the "Company"“Company”) as of December 31, 20192022 and 2018,2021, the related consolidated statements of income, comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2019,2022, the related notes and the schedule listed in the Index at Item 15 (collectively referred to as the "financial statements"“financial statements”). We also have audited the Company’s internal control over financial reporting as of December 31, 2019,2022, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

In our opinion, the financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 31, 20192022 and 2018,2021, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019,2022, in conformity with accounting principles generally accepted in the United States of America. Also, in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2019,2022, based on criteria established in Internal Control - Integrated Framework (2013) issued by COSO.

Basis for Opinions

The Company’s management is responsible for these financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on these financial statements and an opinion on the Company’s internal control over financial reporting based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained in all material respects.

Our audits of the financial statements included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures to respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based
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on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.



Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current-period audit of the financial statements that was communicated or required to be communicated to the audit committee and that (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Regulatory Accounting — Impact of Rate Regulation on the Financial Statements — Refer to Notes 1 and 3 to the financial statements

Critical Audit Matter Description

Arizona Public Service Company (“APS”), which is a wholly-owned subsidiary of the Company, is subject to rate regulation by the Arizona Corporation Commission (the “ACC”), which has jurisdiction with respect to the rates charged by public service utilities in Arizona. Management has determined it meets the requirements under accounting principles generally accepted in the United States of America to prepare its financial statements applying the specialized rules to account for the effects of cost-based rate regulation. Accounting for the economics of rate regulation impacts multiple financial statement line items and disclosures, such as property, plant and equipment; regulatory assets and liabilities; operating revenues; fuel and purchased power; operations and maintenance expense; and depreciation expense.

The ACC’s rate-making policies are premised on the full recovery of prudently incurred costs and a reasonable rate of return on invested capital. Decisions to be made by the ACC in the future will impact the accounting for regulated operations, including decisions about the amount of allowable deferred costs
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and return on invested capital included in rates and any refunds that may be required. While the Company has indicated it expects to recover costs from customers through regulated rates, there is a risk that the ACC will not approve: (1) full recovery of the costs of providing utility service, or (2) full recovery of all amounts invested in the utility business and a reasonable return on that investment. If future recovery of regulatory assets ceases to be probable or a disallowance becomes probable, it would result in a charge to earnings.

We identified Regulatory Accounting, specifically the impact of rate regulation on the financial statements, as a critical audit matter due to the significant judgments made by management to support its assertions about impacted account balances and disclosures and the high degree of subjectivity involved in assessing the impact of future regulatory rate orders on the financial statements. Management judgments include continually assessing the likelihood of future recovery of regulatory assets and/or a disallowance of part of the cost of recently completed plant, by considering factors such as applicable regulatory environment changes, recent rate orders specific to APS and to other regulated entities in the same jurisdiction, and likelihood of success of legal appeals. Management judgments also include assessing the impact of potential ACC-ordered refunds to customers on regulatory liabilities. Given that management’s accounting judgments are based on assumptions about the outcome of future decisions by the ACC and legal bodies, auditing these judgments required specialized knowledge of accounting for rate regulation and the rate setting process due to its inherent complexities.

How the Critical Audit Matter Was Addressed in the Audit

Our audit procedures related to regulatory accounting included the following, among others:
We tested the effectiveness of management’s controls over the evaluation of the likelihood of (1) the recovery in future rates of costs of recently completed plant and costs deferred as regulatory assets and (2) a refund or a future reduction in rates that should be reported as regulatory liabilities. We also tested the effectiveness of management’s controls over the initial recognition of amounts as property, plant, and equipment; regulatory assets or liabilities; the monitoring and evaluation of regulatory developments that may affect the likelihood of recovering costs in future rates or of a future reduction in rates; and the implementation of new rates as ordered by the ACC.
We evaluated the Company’s disclosures related to regulatory accounting, specifically the impact of rate regulation on the financial statements, including the balances recorded and regulatory developments.
We read relevant regulatory rate orders issued by the ACC for APS and other public utilities in Arizona, regulatory statutes, interpretations, procedural memorandums, filings made by intervenors, and other publicly available information to assess the likelihood of recovery in future rates or of a future reduction in rates based on precedents of the ACC’s treatment of similar costs under similar circumstances. We evaluated the external information and compared to management’s recorded regulatory assets and liabilities for completeness.
We read APS’s 2022 rate application submitted to the ACC on October 28, 2022.
We evaluated management’s assessment of the probability of recovery for regulatory assets or refund or future reduction in rates for regulatory liabilities based on applicable regulatory orders or precedents set by the ACC under similar circumstances.For certain regulatory assets or liabilities where management’s assessment is based on precedents established by the ACC under similar circumstances and not specifically addressed in a regulatory order, we also obtained a letter from internal legal counsel regarding their assessment. We read the minutes of the Boards of Directors
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of the Company for discussions of changes in legal, regulatory, or business factors which could impact management’s assessment.
We evaluated management’s assessment that the SCR plant investment is not probable of a partial disallowance and that the SCR deferred costs are probable of recovery. We read the Notice of Direct Appeal filed with the Arizona Court of Appeals and Petition for Special Action filed with the Arizona Supreme Court, read APS’s opening brief submitted to the Arizona Court of Appeals, read the ACC’s Answering Brief, read the Intervenors’ briefs, read APS’s reply brief, and observed the Appeal Oral Arguments, reviewed the Company’s internally prepared memo, and reviewed a legal letter from the Company’s external counsel to assess the likelihood of recovery in future rates or of a future reduction in rates based on the ACC decision.


/s/ Deloitte & Touche LLP

Phoenix,Tempe, Arizona
February 21, 202027, 2023

We have served as the Company'sCompany’s auditor since 1932.



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PINNACLE WEST CAPITAL CORPORATION
CONSOLIDATED STATEMENTS OF INCOME
(dollars and shares in thousands, except per share amounts)
 Year Ended December 31,
 202220212020
OPERATING REVENUES (Note 2)$4,324,385 $3,803,835 $3,586,982 
OPERATING EXPENSES   
Fuel and purchased power1,629,343 1,152,551 993,419 
Operations and maintenance987,072 954,067 958,910 
Depreciation and amortization753,195 650,875 614,378 
Taxes other than income taxes220,370 234,639 224,835 
Other expenses2,494 6,393 7,288 
Total3,592,474 2,998,525 2,798,830 
OPERATING INCOME731,911 805,310 788,152 
OTHER INCOME (DEDUCTIONS)   
Allowance for equity funds used during construction (Note 1)45,263 41,737 33,776 
Pension and other postretirement non-service credits — net (Note 7)98,487 112,541 56,341 
Other income (Note 16)7,916 45,100 56,703 
Other expense (Note 16)(52,385)(25,396)(57,776)
Total99,281 173,982 89,044 
INTEREST EXPENSE   
Interest charges283,569 254,314 247,501 
Allowance for borrowed funds used during construction (Note 1)(28,030)(21,052)(18,530)
Total255,539 233,262 228,971 
INCOME BEFORE INCOME TAXES575,653 746,030 648,225 
INCOME TAXES (Note 4)74,827 110,086 78,173 
NET INCOME500,826 635,944 570,052 
Less: Net income attributable to noncontrolling interests (Note 17)17,224 17,224 19,493 
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS$483,602 $618,720 $550,559 
WEIGHTED-AVERAGE COMMON SHARES OUTSTANDING — BASIC113,196 112,910 112,666 
WEIGHTED-AVERAGE COMMON SHARES OUTSTANDING — DILUTED113,416 113,192 112,942 
EARNINGS PER WEIGHTED-AVERAGE COMMON SHARE OUTSTANDING   
Net income attributable to common shareholders — basic$4.27 $5.48 $4.89 
Net income attributable to common shareholders — diluted$4.26 $5.47 $4.87 

The accompanying notes are an integral part of the financial statements.
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PINNACLE WEST CAPITAL CORPORATION
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
(dollars in thousands)
 Year Ended December 31,
 202220212020
NET INCOME$500,826 $635,944 $570,052 
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX   
Derivative instruments:   
Net unrealized gain (loss), net of tax benefit (expense) of $(615), $(378), and $6621,873 1,077 (2,089)
Reclassification of net realized gain, net of tax benefit (expense) of $0, $18, and $(171) (Note 15)— 18 592 
Pension and other postretirement benefits activity, net of tax benefit (expense) of $(7,078), $(2,256), and $1,371 (Note 7)21,553 6,840 (4,203)
Total other comprehensive income (loss)23,426 7,935 (5,700)
COMPREHENSIVE INCOME524,252 643,879 564,352 
Less: Comprehensive income attributable to noncontrolling interests17,224 17,224 19,493 
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS$507,028 $626,655 $544,859 
The accompanying notes are an integral part of the financial statements.


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PINNACLE WEST CAPITAL CORPORATION
CONSOLIDATED BALANCE SHEETS
(dollars in thousands)
 December 31,
 20222021
ASSETS  
CURRENT ASSETS  
Cash and cash equivalents$4,832 $9,969 
Customer and other receivables453,209 391,923 
Accrued unbilled revenues164,764 133,980 
Allowance for doubtful accounts (Note 2)(23,778)(25,354)
Materials and supplies (at average cost)410,481 349,135 
Fossil fuel (at average cost)40,155 18,032 
Income tax receivable (Note 4)14,086 7,514 
Assets from risk management activities (Note 15)87,835 63,481 
Deferred fuel and purchased power regulatory asset (Note 3)460,561 388,148 
Other regulatory assets (Note 3)78,318 130,376 
Other current assets60,091 83,896 
Total current assets1,750,554 1,551,100 
INVESTMENTS AND OTHER ASSETS  
Nuclear decommissioning trusts (Notes 12 and 18)1,073,410 1,294,757 
Other special use funds (Notes 12 and 18)347,231 358,410 
Assets from risk management activities (Note 15)44,394 46,908 
Other assets125,672 97,884 
Total investments and other assets1,590,707 1,797,959 
PROPERTY, PLANT AND EQUIPMENT (Notes 1, 6 and 9)  
Plant in service and held for future use22,452,146 21,688,661 
Accumulated depreciation and amortization(7,929,878)(7,504,603)
Net14,522,268 14,184,058 
Construction work in progress1,882,791 1,329,478 
Palo Verde sale leaseback, net of accumulated depreciation of $260,754 and $256,884 (Note 17)90,296 94,166 
Intangible assets, net of accumulated amortization of $817,961 and $737,694258,880 273,693 
Nuclear fuel, net of accumulated amortization of $126,157 and $133,122100,119 106,039 
Total property, plant and equipment16,854,354 15,987,434 
DEFERRED DEBITS  
Regulatory assets (Notes 1, 3 and 4)1,283,221 1,192,987 
Operating lease right-of-use assets (Note 8)801,688 890,057 
Assets for pension and other postretirement benefits (Note 7)396,599 545,723 
Other46,282 37,962 
Total deferred debits2,527,790 2,666,729 
TOTAL ASSETS$22,723,405 $22,003,222 
The accompanying notes are an integral part of the financial statements.


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PINNACLE WEST CAPITAL CORPORATION
CONSOLIDATED BALANCE SHEETS
(dollars in thousands)
 December 31,
 20222021
LIABILITIES AND EQUITY  
CURRENT LIABILITIES  
Accounts payable$430,425 $393,083 
Accrued taxes164,440 168,645 
Accrued interest61,217 57,332 
Common dividends payable97,895 95,988 
Short-term borrowings (Note 5)340,720 292,000 
Current maturities of long-term debt (Note 6)50,685 150,000 
Customer deposits41,769 42,293 
Liabilities from risk management activities (Note 15)37,697 4,373 
Liabilities for asset retirements (Note 11)12,232 4,473 
Operating lease liabilities (Note 8)105,210 100,443 
Regulatory liabilities (Note 3)271,575 296,271 
Other current liabilities148,276 151,968 
Total current liabilities1,762,141 1,756,869 
LONG-TERM DEBT LESS CURRENT MATURITIES (Note 6)7,741,286 6,913,735 
DEFERRED CREDITS AND OTHER  
Deferred income taxes (Note 4)2,384,421 2,311,862 
Regulatory liabilities (Notes 1, 3, 4 and 7)2,061,776 2,499,213 
Liabilities for asset retirements (Note 11)785,530 762,909 
Liabilities for pension benefits (Note 7)116,286 152,865 
Customer advances422,103 257,151 
Coal mine reclamation179,255 174,616 
Deferred investment tax credit180,677 186,570 
Unrecognized tax benefits (Note 4)38,658 4,657 
Operating lease liabilities (Note 8)639,247 728,401 
Other252,149 232,914 
Total deferred credits and other7,060,102 7,311,158 
COMMITMENTS AND CONTINGENCIES (SEE NOTES)
EQUITY  
Common stock, no par value; authorized 150,000,000 shares, 113,247,189 and 113,014,528 issued at respective dates2,724,740 2,702,743 
Treasury stock at cost; 73,613 and 87,608 shares at respective dates(5,005)(6,401)
Total common stock2,719,735 2,696,342 
Retained earnings3,360,347 3,264,719 
Accumulated other comprehensive loss (Note 19)(31,435)(54,861)
Total shareholders’ equity6,048,647 5,906,200 
Noncontrolling interests (Note 17)111,229 115,260 
Total equity6,159,876 6,021,460 
TOTAL LIABILITIES AND EQUITY$22,723,405 $22,003,222 

The accompanying notes are an integral part of the financial statements.
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PINNACLE WEST CAPITAL CORPORATION
CONSOLIDATED STATEMENTS OF CASH FLOWS
(dollars in thousands)
 Year Ended December 31,
 202220212020
CASH FLOWS FROM OPERATING ACTIVITIES   
Net Income$500,826 $635,944 $570,052 
Adjustments to reconcile net income to net cash provided by operating activities:   
Depreciation and amortization including nuclear fuel817,814 719,141 686,253 
Deferred fuel and purchased power(291,992)(256,871)(93,651)
Deferred fuel and purchased power amortization219,579 44,557 (12,047)
Allowance for equity funds used during construction(45,263)(41,737)(33,776)
Deferred income taxes43,202 117,471 69,469 
Deferred investment tax credit(5,893)(4,802)(5,096)
Change in derivative instruments fair value777 — — 
Stock compensation15,942 18,460 18,292 
Changes in current assets and liabilities:   
Customer and other receivables(63,869)(72,559)(18,191)
Accrued unbilled revenues(30,784)(1,783)(4,032)
Materials, supplies and fossil fuel(83,469)(32,870)11,623 
Income tax receivable(6,572)(722)14,935 
Other current assets76,067 (22,720)(30,640)
Accounts payable90,076 20,267 (6,059)
Accrued taxes(4,205)9,094 14,652 
Other current liabilities(6,056)(52,086)22,520 
Change in margin and collateral accounts — assets22 (50)404 
Change in margin and collateral accounts — liabilities4,200 350 100 
Change in unrecognized tax benefits(1,989)(568)2,220 
Change in long-term regulatory liabilities(332,470)57,549 13,017 
Change in other long-term assets276,821 (246,473)(67,453)
Change in other long-term liabilities68,677 (29,578)(186,227)
Net cash provided by operating activities1,241,441 860,014 966,365 
CASH FLOWS FROM INVESTING ACTIVITIES   
Capital expenditures(1,707,490)(1,473,475)(1,326,584)
Contributions in aid of construction137,436 105,654 62,503 
Allowance for borrowed funds used during construction(28,030)(21,052)(18,530)
Proceeds from nuclear decommissioning trust sales and other special use funds1,207,713 1,720,966 819,518 
Investment in nuclear decommissioning trust and other special use funds(1,212,063)(1,725,480)(822,608)
Other(15,612)6,458 7,883 
Net cash used for investing activities(1,618,046)(1,386,929)(1,277,818)
CASH FLOWS FROM FINANCING ACTIVITIES   
Issuance of long-term debt875,537 746,999 1,596,672 
Repayment of long-term debt(150,000)— (915,150)
Short-term borrowings and (repayments) — net48,720 142,000 73,325 
Short-term debt borrowings under revolving credit facility— — 751,690 
Short-term debt repayments under revolving credit facility— (19,000)(770,690)
Dividends paid on common stock(378,881)(369,478)(350,577)
Common stock equity issuance and purchases — net(2,653)(2,350)(1,389)
Distributions to noncontrolling interests(21,255)(21,255)(22,743)
Net cash provided by financing activities371,468 476,916 361,138 
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS(5,137)(49,999)49,685 
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR9,969 59,968 10,283 
CASH AND CASH EQUIVALENTS AT END OF YEAR$4,832 $9,969 $59,968 
The accompanying notes are an integral part of the financial statements.
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PINNACLE WEST CAPITAL CORPORATION
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
(dollars in thousands, except per share amounts)
Common StockTreasury StockRetained EarningsAccumulated Other Comprehensive Income (Loss)Noncontrolling InterestsTotal
SharesAmountSharesAmount
Balance, December 31, 2019112,540,126 $2,659,561 (103,546)$(9,427)$2,837,610 $(57,096)$122,540 $5,553,188 
Net income— — 550,559 — 19,493 570,052 
Other comprehensive loss— — — (5,700)— (5,700)
Dividends on common stock ($3.23 per share)— — (363,063)— — (363,063)
Issuance of common stock219,925 17,921 — — — — 17,921 
Purchase of treasury stock (a)— (81,256)(7,181)— — — (7,181)
Reissuance of treasury stock for stock-based compensation and other— 112,796 10,319 — — — 10,319 
Capital activities by noncontrolling interests— — — — (22,743)(22,743)
Balance, December 31, 2020112,760,051 2,677,482 (72,006)(6,289)3,025,106 (62,796)119,290 5,752,793 
Net income— — 618,720 — 17,224 635,944 
Other comprehensive income— — — 7,935 — 7,935 
Dividends on common stock ($3.36 per share)— — (379,108)— — (379,108)
Issuance of common stock254,477 25,261 — — — — 25,261 
Purchase of treasury stock (a)— (68,892)(4,655)— — — (4,655)
Reissuance of treasury stock for stock-based compensation and other— 53,290 4,543 — — — 4,543 
Capital activities by noncontrolling interests— — — — (21,255)(21,255)
Other— — — 
Balance, December 31, 2021113,014,528 2,702,743 (87,608)(6,401)3,264,719 (54,861)115,260 6,021,460 
Net income— — 483,602 — 17,224 500,826 
Other comprehensive income— — — 23,426 — 23,426 
Dividends on common stock ($3.43 per share)— — (387,975)— — (387,975)
Issuance of common stock232,661 21,996 — — — — 21,996 
Purchase of treasury stock (a)— (77,152)(5,152)— — — (5,152)
Reissuance of treasury stock for stock-based compensation and other— 91,147 6,548 — — — 6,548 
Capital activities by noncontrolling interests— — — — (21,255)(21,255)
Other— — — 
Balance, December 31, 2022113,247,189 $2,724,740 (73,613)$(5,005)$3,360,347 $(31,435)$111,229 $6,159,876 
(a)    Primarily represents shares of common stock withheld from certain stock awards for tax purposes.
The accompanying notes are an integral part of the financial statements.
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MANAGEMENT’S REPORT ON INTERNAL CONTROL
OVER FINANCIAL REPORTING
(ARIZONA PUBLIC SERVICE COMPANY)

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f), for Arizona Public Service Company.  Management conducted an evaluation of the effectiveness of our internal control over financial reporting based on the framework in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.  Based on our evaluation under the framework in Internal Control — Integrated Framework (2013), our management concluded that our internal control over financial reporting was effective as of December 31, 2022.  The effectiveness of our internal control over financial reporting as of December 31, 2022, has been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their report which is included herein and also relates to the Company’s financial statements.
February 27, 2023
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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Shareholder and the Board of Directors of
Arizona Public Service Company
Phoenix, Arizona

Opinions on the Financial Statements and Internal Control over Financial Reporting

We have audited the accompanying consolidated balance sheets of Arizona Public Service Company and subsidiaries (the “Company”) as of December 31, 2022 and 2021, the related consolidated statements of income, comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2022, and the related notes (collectively referred to as the “financial statements”). We also have audited the Company’s internal control over financial reporting as of December 31, 2022, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

In our opinion, the financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 31, 2022 and 2021, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2022, in conformity with accounting principles generally accepted in the United States of America. Also, in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2022, based on criteria established in Internal Control — Integrated Framework (2013) issued by COSO.

Basis for Opinions

The Company’s management is responsible for these financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on these financial statements and an opinion on the Company’s internal control over financial reporting based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained in all material respects.

Our audits of the financial statements included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures to respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based
102

on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current-period audit of the financial statements that was communicated or required to be communicated to the audit committee and that (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Regulatory Accounting – Impact of Rate Regulation on the Financial Statements — Refer to Notes 1 and 3 to the financial statements

Critical Audit Matter Description

The Company is subject to rate regulation by the Arizona Corporation Commission (the “ACC”), which has jurisdiction with respect to the rates charged by public service utilities in Arizona. Management has determined it meets the requirements under accounting principles generally accepted in the United States of America to prepare its financial statements applying the specialized rules to account for the effects of cost-based rate regulation. Accounting for the economics of rate regulation impacts multiple financial statement line items and disclosures, such as property, plant and equipment; regulatory assets and liabilities; operating revenues; fuel and purchased power; operations and maintenance expense; and depreciation expense.

The ACC’s rate-making policies are premised on the full recovery of prudently incurred costs and a reasonable rate of return on invested capital. Decisions to be made by the ACC in the future will impact the accounting for regulated operations, including decisions about the amount of allowable deferred costs
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and return on invested capital included in rates and any refunds that may be required. While the Company has indicated it expects to recover costs from customers through regulated rates, there is a risk that the ACC will not approve: (1) full recovery of the costs of providing utility service, or (2) full recovery of all amounts invested in the utility business and a reasonable return on that investment. If future recovery of regulatory assets ceases to be probable or a disallowance becomes probable, it would result in a charge to earnings.

We identified Regulatory Accounting, specifically the impact of rate regulation on the financial statements, as a critical audit matter due to the significant judgments made by management to support its assertions about impacted account balances and disclosures and the high degree of subjectivity involved in assessing the impact of future regulatory rate orders on the financial statements. Management judgments include continually assessing the likelihood of future recovery of regulatory assets and/or a disallowance of part of the cost of recently completed plant, by considering factors such as applicable regulatory environment changes, recent rate orders specific to APS and to other regulated entities in the same jurisdiction, and likelihood of success of legal appeals. Management judgments also include assessing the impact of potential ACC-ordered refunds to customers on regulatory liabilities. Given that management’s accounting judgments are based on assumptions about the outcome of future decisions by the ACC and legal bodies, auditing these judgments required specialized knowledge of accounting for rate regulation and the rate setting process due to its inherent complexities.

How the Critical Audit Matter Was Addressed in the Audit

Our audit procedures related to regulatory accounting included the following, among others:
We tested the effectiveness of management’s controls over the evaluation of the likelihood of (1) the recovery in future rates of costs of recently completed plant and costs deferred as regulatory assets and (2) a refund or a future reduction in rates that should be reported as regulatory liabilities. We also tested the effectiveness of management’s controls over the initial recognition of amounts as property, plant, and equipment; regulatory assets or liabilities; the monitoring and evaluation of regulatory developments that may affect the likelihood of recovering costs in future rates or of a future reduction in rates; and the implementation of new rates as ordered by the ACC.
We evaluated the Company’s disclosures related to regulatory accounting, specifically the impact of rate regulation on the financial statements, including the balances recorded and regulatory developments.
We read relevant regulatory rate orders issued by the ACC for APS and other public utilities in Arizona, regulatory statutes, interpretations, procedural memorandums, filings made by intervenors, and other publicly available information to assess the likelihood of recovery in future rates or of a future reduction in rates based on precedents of the ACC’s treatment of similar costs under similar circumstances. We evaluated the external information and compared to management’s recorded regulatory assets and liabilities for completeness.
We read the Company’s 2022 rate application submitted to the ACC on October 28, 2022.
We evaluated management’s assessment of the probability of recovery for regulatory assets or refund or future reduction in rates for regulatory liabilities based on applicable regulatory orders or precedents set by the ACC under similar circumstances. For certain regulatory assets or liabilities where management’s assessment is based on precedents established by the ACC under similar circumstances and not specifically addressed in a regulatory order, we also obtained a letter from internal legal counsel regarding their assessment. We read the minutes of the Boards of Directors
104

of the Company for discussions of changes in legal, regulatory, or business factors which could impact management’s assessment.
We evaluated management’s assessment that the SCR plant investment is not probable of a partial disallowance and that the SCR deferred costs are probable of recovery. We read the Notice of Direct Appeal filed with the Arizona Court of Appeals and Petition for Special Action filed with the Arizona Supreme Court, read the Company’s opening brief submitted to the Arizona Court of Appeals, read the ACC’s Answering Brief, read the Intervenors’ briefs, read the Company’s reply brief, and observed the Appeal Oral Arguments, reviewed the Company’s internally prepared memo, and reviewed a legal letter from the Company’s external counsel to assess the likelihood of recovery in future rates or of a future reduction in rates based on the ACC decision.


/s/ Deloitte & Touche LLP

Tempe, Arizona
February 27, 2023

We have served as the Company’s auditor since 1932.

105

ARIZONA PUBLIC SERVICE COMPANY
CONSOLIDATED STATEMENTS OF INCOME
(dollars in thousands)
 
Year Ended December 31,
Year Ended December 31, 202220212020
2019 2018 2017
     
OPERATING REVENUES (NOTE 2)$3,471,209
 $3,688,342
 $3,557,652
OPERATING REVENUES (Note 2)OPERATING REVENUES (Note 2)$4,324,385 $3,803,835 $3,586,982 
     
OPERATING EXPENSES 
  
  
OPERATING EXPENSES   
Fuel and purchased power1,042,237
 1,094,020
 992,744
Fuel and purchased power1,629,343 1,152,551 993,419 
Operations and maintenance926,716
 969,227
 917,983
Operations and maintenance974,220 940,588 945,181 
Depreciation and amortization590,844
 580,694
 532,423
Depreciation and amortization753,110 650,773 614,293 
Taxes other than income taxes218,540
 212,136
 183,254
Taxes other than income taxes220,277 234,569 224,790 
Other expense5,888
 2,497
 6,709
Other expense2,494 6,393 7,288 
Total2,784,225
 2,858,574
 2,633,113
Total3,579,444 2,984,874 2,784,971 
OPERATING INCOME686,984
 829,768
 924,539
OPERATING INCOME744,941 818,961 802,011 
OTHER INCOME (DEDUCTIONS) 
  
  
OTHER INCOME (DEDUCTIONS)   
Allowance for equity funds used during construction (Note 1)31,431
 52,319
 47,011
Allowance for equity funds used during construction (Note 1)45,263 41,737 33,776 
Pension and other postretirement non-service credits - net (Note 8)24,529
 51,242
 24,371
Other income (Note 18)46,884
 22,746
 3,013
Other expense (Note 18)(12,990) (15,292) (13,913)
Pension and other postretirement non-service credits — net (Note 7)Pension and other postretirement non-service credits — net (Note 7)98,945 112,742 57,359 
Other income (Note 16)Other income (Note 16)5,888 43,053 51,755 
Other expense (Note 16)Other expense (Note 16)(26,108)(18,897)(53,694)
Total89,854
 111,015
 60,482
Total123,988 178,635 89,196 
INTEREST EXPENSE 
  
  
INTEREST EXPENSE   
Interest charges220,174
 231,391
 214,163
Interest charges262,815 243,592 233,452 
Allowance for borrowed funds used during construction (Note 1)(18,528) (25,180) (22,112)Allowance for borrowed funds used during construction (Note 1)(26,839)(21,052)(18,530)
Total201,646
 206,211
 192,051
Total235,976 222,540 214,922 
INCOME BEFORE INCOME TAXES575,192
 734,572
 792,970
INCOME BEFORE INCOME TAXES632,953 775,056 676,285 
INCOME TAXES (Note 5)(9,572) 144,814
 269,168
INCOME TAXES (Note 4)INCOME TAXES (Note 4)90,800 125,553 88,764 
NET INCOME584,764
 589,758
 523,802
NET INCOME542,153 649,503 587,521 
Less: Net income attributable to noncontrolling interests (Note 19)19,493
 19,493
 19,493
Less: Net income attributable to noncontrolling interests
(Note 17)
Less: Net income attributable to noncontrolling interests
(Note 17)
17,224 17,224 19,493 
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDER$565,271
 $570,265
 $504,309
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDER$524,929 $632,279 $568,028 
 
The accompanying notes are an integral part of the financial statements.

106

ARIZONA PUBLIC SERVICE COMPANY
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
(dollars in thousands)
 
Year Ended December 31, Year Ended December 31,
2019 2018 2017 202220212020
     
NET INCOME$584,764
 $589,758
 $523,802
NET INCOME$542,153 $649,503 $587,521 
     
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX 
  
  
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX   
Derivative instruments: 
  
  
Derivative instruments:   
Net unrealized loss, net of tax benefit (expense) of $0, ($78), and $24 (Note 17)
 (78) (35)
Reclassification of net realized loss, net of tax benefit of $375, $473, and $1,294 (Note 17)1,137
 1,527
 2,225
Pension and other postretirement benefits activity, net of tax benefit (expense) of $3,136, ($1,159), and $977 (Note 8)(9,552) 3,465
 (3,750)
Net unrealized loss, net of tax expense of $0, $18, and $18Net unrealized loss, net of tax expense of $0, $18, and $18— (18)(18)
Reclassification of net realized gain, net of tax benefit (expense) of $0, $18, and $(171) (Note 15)Reclassification of net realized gain, net of tax benefit (expense) of $0, $18, and $(171) (Note 15)— 18 592 
Pension and other postretirement benefits activity, net of tax benefit (expense) of $(6,332), $(1,990), and $1,955 (Note 7)Pension and other postretirement benefits activity, net of tax benefit (expense) of $(6,332), $(1,990), and $1,955 (Note 7)19,284 6,038 (5,970)
Total other comprehensive income (loss)(8,415) 4,914
 (1,560)Total other comprehensive income (loss)19,284 6,038 (5,396)
     
COMPREHENSIVE INCOME576,349
 594,672
 522,242
COMPREHENSIVE INCOME561,437 655,541 582,125 
Less: Comprehensive income attributable to noncontrolling interests19,493
 19,493
 19,493
Less: Comprehensive income attributable to noncontrolling interests17,224 17,224 19,493 
     
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDER$556,856
 $575,179
 $502,749
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDER$544,213 $638,317 $562,632 
 
The accompanying notes are an integral part of the financial statements.


107

ARIZONA PUBLIC SERVICE COMPANY
CONSOLIDATED BALANCE SHEETS
(dollars in thousands)
 
December 31, December 31,
2019 2018 20222021
ASSETS 
  
ASSETS  
PROPERTY, PLANT AND EQUIPMENT (Notes 1, 7 and 10) 
  
PROPERTY, PLANT AND EQUIPMENT (Notes 1, 6 and 9)PROPERTY, PLANT AND EQUIPMENT (Notes 1, 6 and 9)  
Plant in service and held for future use$19,832,805
 $18,733,142
Plant in service and held for future use$22,448,685 $21,685,200 
Accumulated depreciation and amortization(6,634,597) (6,362,771)Accumulated depreciation and amortization(7,926,575)(7,501,317)
Net13,198,208
 12,370,371
Net14,522,110 14,183,883 
Construction work in progress808,133
 1,170,062
Construction work in progress1,829,004 1,327,721 
Palo Verde sale leaseback, net of accumulated depreciation of $249,144 and $245,275 (Note 19)101,906
 105,775
Intangible assets, net of accumulated amortization of $646,142 and $590,069290,409
 262,746
Nuclear fuel, net of accumulated amortization of $137,330 and $137,850123,500
 120,217
Palo Verde sale leaseback, net of accumulated depreciation of $260,754 and $256,884 (Note 17)Palo Verde sale leaseback, net of accumulated depreciation of $260,754 and $256,884 (Note 17)90,296 94,166 
Intangible assets, net of accumulated amortization of $816,827 and $736,560Intangible assets, net of accumulated amortization of $816,827 and $736,560258,725 273,537 
Nuclear fuel, net of accumulated amortization of $126,157 and $133,122Nuclear fuel, net of accumulated amortization of $126,157 and $133,122100,119 106,039 
Total property, plant and equipment14,522,156
 14,029,171
Total property, plant and equipment16,800,254 15,985,346 
INVESTMENTS AND OTHER ASSETS 
  
INVESTMENTS AND OTHER ASSETS  
Nuclear decommissioning trust (Notes 14 and 20)1,010,775
 851,134
Other special use funds (Notes 14 and 20)245,095
 236,101
Nuclear decommissioning trusts (Notes 12 and 18)Nuclear decommissioning trusts (Notes 12 and 18)1,073,410 1,294,757 
Other special use funds (Notes 12 and 18)Other special use funds (Notes 12 and 18)347,231 358,410 
Assets from risk management activities (Note 15)Assets from risk management activities (Note 15)44,394 46,908 
Other assets43,781
 40,817
Other assets43,344 42,440 
Total investments and other assets1,299,651
 1,128,052
Total investments and other assets1,508,379 1,742,515 
CURRENT ASSETS 
  
CURRENT ASSETS  
Cash and cash equivalents10,169
 5,707
Cash and cash equivalents4,042 9,374 
Customer and other receivables255,479
 257,654
Customer and other receivables448,880 390,533 
Accrued unbilled revenues128,165
 137,170
Accrued unbilled revenues164,764 133,980 
Allowance for doubtful accounts(8,171) (4,069)
Allowance for doubtful accounts (Note 2)Allowance for doubtful accounts (Note 2)(23,778)(25,354)
Materials and supplies (at average cost)331,091
 269,065
Materials and supplies (at average cost)410,481 349,135 
Fossil fuel (at average cost)14,829
 25,029
Fossil fuel (at average cost)40,155 18,032 
Income tax receivable (Note 5)7,313
 
Assets from risk management activities (Note 17)515
 1,113
Deferred fuel and purchased power regulatory asset (Note 4)70,137
 37,164
Other regulatory assets (Note 4)133,070
 129,738
Income tax receivable (Note 4)Income tax receivable (Note 4)1,102 10,756 
Assets from risk management activities (Note 15)Assets from risk management activities (Note 15)87,704 63,481 
Deferred fuel and purchased power regulatory asset (Note 3)Deferred fuel and purchased power regulatory asset (Note 3)460,561 388,148 
Other regulatory assets (Note 3)Other regulatory assets (Note 3)78,318 130,376 
Other current assets38,895
 35,111
Other current assets50,043 57,729 
Total current assets981,492
 893,682
Total current assets1,722,272 1,526,190 
DEFERRED DEBITS 
  
DEFERRED DEBITS  
Regulatory assets (Notes 1, 4, and 5)1,304,073
 1,342,941
Operating lease right-of-use assets (Note 9)144,024
 
Assets for other postretirement benefits (Note 8)86,736
 43,212
Regulatory assets (Notes 1, 3, and 4)Regulatory assets (Notes 1, 3, and 4)1,283,221 1,192,987 
Operating lease right-of-use assets (Note 8)Operating lease right-of-use assets (Note 8)796,544 888,207 
Assets for pension and other postretirement benefits (Note 7)Assets for pension and other postretirement benefits (Note 7)389,142 537,092 
Other32,591
 128,265
Other44,040 37,319 
Total deferred debits1,567,424
 1,514,418
Total deferred debits2,512,947 2,655,605 
TOTAL ASSETS$18,370,723
 $17,565,323
TOTAL ASSETS$22,543,852 $21,909,656 
 
The accompanying notes are an integral part of the financial statements.

108

ARIZONA PUBLIC SERVICE COMPANY
CONSOLIDATED BALANCE SHEETS
(dollars in thousands)
 
December 31, December 31,
2019 2018 20222021
LIABILITIES AND EQUITY 
  
LIABILITIES AND EQUITY  
CAPITALIZATION 
  
CAPITALIZATION  
Common stock$178,162
 $178,162
Common stock$178,162 $178,162 
Additional paid-in capital2,721,696
 2,721,696
Additional paid-in capital3,171,696 3,021,696 
Retained earnings3,011,927
 2,788,256
Retained earnings3,607,464 3,470,235 
Accumulated other comprehensive loss (Note 21)(35,522) (27,107)
Accumulated other comprehensive loss (Note 19)Accumulated other comprehensive loss (Note 19)(15,596)(34,880)
Total shareholder equity5,876,263
 5,661,007
Total shareholder equity6,941,726 6,635,213 
Noncontrolling interests (Note 19)122,540
 125,790
Noncontrolling interests (Note 17)Noncontrolling interests (Note 17)111,229 115,260 
Total equity5,998,803
 5,786,797
Total equity7,052,955 6,750,473 
Long-term debt less current maturities (Note 7)4,833,133
 4,189,436
Long-term debt less current maturities (Note 6)Long-term debt less current maturities (Note 6)6,793,529 6,266,693 
Total capitalization10,831,936
 9,976,233
Total capitalization13,846,484 13,017,166 
CURRENT LIABILITIES 
  
CURRENT LIABILITIES  
Current maturities of long-term debt (Note 7)350,000
 500,000
Short-term borrowings (Note 5)Short-term borrowings (Note 5)325,000 278,700 
Accounts payable338,006
 266,277
Accounts payable417,732 389,365 
Accrued taxes136,328
 176,357
Accrued taxes156,746 152,012 
Accrued interest52,619
 60,228
Accrued interest60,518 56,622 
Common dividends payable88,000
 82,700
Common dividends payable97,900 96,000 
Customer deposits64,908
 91,174
Customer deposits41,769 42,293 
Liabilities from risk management activities (Note 17)38,946
 35,506
Liabilities for asset retirements (Note 12)11,025
 19,842
Operating lease liabilities (Note 9)12,549
 
Regulatory liabilities (Note 4)234,912
 165,876
Liabilities from risk management activities (Note 15)Liabilities from risk management activities (Note 15)37,697 4,373 
Liabilities for asset retirements (Note 11)Liabilities for asset retirements (Note 11)12,232 4,473 
Operating lease liabilities (Note 8)Operating lease liabilities (Note 8)104,728 100,199 
Regulatory liabilities (Note 3)Regulatory liabilities (Note 3)271,575 296,271 
Other current liabilities164,736
 178,137
Other current liabilities144,733 145,286 
Total current liabilities1,492,029
 1,576,097
Total current liabilities1,670,630 1,565,594 
DEFERRED CREDITS AND OTHER 
  
DEFERRED CREDITS AND OTHER  
Deferred income taxes (Note 5)2,033,096
 1,812,664
Regulatory liabilities (Notes 1, 4, 5 and 8)2,267,835
 2,325,976
Liabilities for asset retirements (Note 12)646,193
 706,703
Liabilities for pension benefits (Note 8)262,243
 425,404
Liabilities from risk management activities (Note 17)33,186
 24,531
Deferred income taxes (Note 4)Deferred income taxes (Note 4)2,385,647 2,331,701 
Regulatory liabilities (Notes 1, 3, 4 and 7)Regulatory liabilities (Notes 1, 3, 4 and 7)2,061,776 2,499,213 
Liabilities for asset retirements (Note 11)Liabilities for asset retirements (Note 11)785,530 762,909 
Liabilities for pension benefits (Note 7)Liabilities for pension benefits (Note 7)108,068 138,328 
Customer advances215,330
 137,153
Customer advances422,103 257,151 
Coal mine reclamation165,695
 212,785
Coal mine reclamation179,255 174,616 
Deferred investment tax credit196,468
 200,405
Deferred investment tax credit180,677 186,570 
Unrecognized tax benefits (Note 5)40,188
 41,861
Operating lease liabilities (Note 9)50,092
 
Unrecognized tax benefits (Note 4)Unrecognized tax benefits (Note 4)38,658 37,423 
Operating lease liabilities (Note 8)Operating lease liabilities (Note 8)634,199 726,572 
Other136,432
 125,511
Other230,825 212,413 
Total deferred credits and other6,046,758
 6,012,993
Total deferred credits and other7,026,738 7,326,896 
COMMITMENTS AND CONTINGENCIES (SEE NOTES)


 


COMMITMENTS AND CONTINGENCIES (SEE NOTES)
TOTAL LIABILITIES AND EQUITY$18,370,723
 $17,565,323
TOTAL LIABILITIES AND EQUITY$22,543,852 $21,909,656 
 The accompanying notes are an integral part of the financial statements.

109

ARIZONA PUBLIC SERVICE COMPANY
CONSOLIDATED STATEMENTS OF CASH FLOWS
(dollars in thousands)
Year Ended December 31, Year Ended December 31,
2019 2018 2017 202220212020
CASH FLOWS FROM OPERATING ACTIVITIES 
  
  
CASH FLOWS FROM OPERATING ACTIVITIES   
Net income$584,764
 $589,758
 $523,802
Net income$542,153 $649,503 $587,521 
Adjustments to reconcile net income to net cash provided by operating activities: 
  
  
Adjustments to reconcile net income to net cash provided by operating activities:   
Depreciation and amortization including nuclear fuel664,055
 649,295
 608,935
Depreciation and amortization including nuclear fuel817,729 719,039 686,168 
Deferred fuel and purchased power(82,481) (78,277) (48,405)Deferred fuel and purchased power(291,992)(256,871)(93,651)
Deferred fuel and purchased power amortization49,508
 116,750
 (14,767)Deferred fuel and purchased power amortization219,579 44,557 (12,047)
Allowance for equity funds used during construction(31,431) (52,319) (47,011)Allowance for equity funds used during construction(45,263)(41,737)(33,776)
Deferred income taxes48,367
 59,927
 249,465
Deferred income taxes(6,817)128,852 36,462 
Deferred investment tax credit(3,938) (5,170) (4,587)Deferred investment tax credit(5,893)(4,802)(5,096)
Change in derivative instruments fair value
 
 (373)
Changes in current assets and liabilities: 
  
  
Changes in current assets and liabilities:   
Customer and other receivables(12,075) 35,406
 (68,040)Customer and other receivables(60,930)(72,101)(28,206)
Accrued unbilled revenues9,005
 (24,736) (4,485)Accrued unbilled revenues(30,784)(1,783)(4,032)
Materials, supplies and fossil fuel(51,826) (6,206) (6,503)Materials, supplies and fossil fuel(83,469)(32,870)11,623 
Income tax receivable(7,313) 
 11,174
Income tax receivable9,654 (10,756)7,313 
Other current assets(1,461) 31,707
 (6,775)Other current assets59,948 (25,587)(24,669)
Accounts payable53,258
 (15,608) (26,561)Accounts payable79,492 23,510 (4,503)
Accrued taxes(40,029) 19,008
 26,773
Accrued taxes4,734 3,042 12,642 
Other current liabilities(82,138) 25,070
 27,912
Other current liabilities(3,010)(61,647)29,587 
Change in margin and collateral accounts — assets(247) 143
 (300)Change in margin and collateral accounts — assets22 (50)404 
Change in margin and collateral accounts — liabilities(125) (2,211) (533)Change in margin and collateral accounts — liabilities4,200 350 100 
Change in unrecognized tax benefits2,704
 (1,235) 5,891
Change in unrecognized tax benefits(1,989)(568)2,220 
Change in long-term regulatory liabilities124,221
 (109,284) 45,764
Change in long-term regulatory liabilities(332,470)57,549 13,017 
Change in other long-term assets(85,725) 77,952
 (78,540)Change in other long-term assets288,077 (231,804)(65,139)
Change in other long-term liabilities(129,682) (55,169) (31,106)Change in other long-term liabilities67,131 (20,272)(186,871)
Net cash flow provided by operating activities1,007,411
 1,254,801
 1,161,730
Net cash provided by operating activitiesNet cash provided by operating activities1,230,102 865,554 929,067 
CASH FLOWS FROM INVESTING ACTIVITIES 
  
  
CASH FLOWS FROM INVESTING ACTIVITIES   
Capital expenditures(1,191,447) (1,169,061) (1,381,930)Capital expenditures(1,655,051)(1,471,795)(1,326,584)
Contributions in aid of construction70,693
 27,716
 23,708
Contributions in aid of construction137,436 105,654 62,503 
Allowance for borrowed funds used during construction(18,528) (25,180) (22,112)Allowance for borrowed funds used during construction(26,839)(21,052)(18,530)
Proceeds from nuclear decommissioning trust sales and other special use funds719,034
 653,033
 542,246
Proceeds from nuclear decommissioning trust sales and other special use funds1,207,713 1,720,966 819,518 
Investment in nuclear decommissioning trust and other special use funds(722,181) (672,165) (544,527)Investment in nuclear decommissioning trust and other special use funds(1,212,063)(1,725,480)(822,608)
Other6,336
 (1,789) (18,538)Other(727)273 (554)
Net cash flow used for investing activities(1,136,093) (1,187,446) (1,401,153)
Net cash used for investing activitiesNet cash used for investing activities(1,549,531)(1,391,434)(1,286,255)
CASH FLOWS FROM FINANCING ACTIVITIES 
  
  
CASH FLOWS FROM FINANCING ACTIVITIES   
Issuance of long-term debt1,092,188
 295,245
 549,478
Issuance of long-term debt524,852 446,999 1,099,722 
Repayment of long-term debt(600,000) (182,000) 
Repayment of long-term debt— — (465,150)
Short-term borrowings and (repayments) — net
 
 (135,500)Short-term borrowings and (repayments) — net46,300 278,700 — 
Short-term debt borrowings under revolving credit facility
 25,000
 
Short-term debt borrowings under revolving credit facility— — 540,000 
Short-term debt repayments under revolving credit facility
 (25,000) 
Short-term debt repayments under revolving credit facility— — (540,000)
Dividends paid on common stock(336,300) (316,000) (296,800)Dividends paid on common stock(385,800)(376,500)(357,500)
Equity infusion from Pinnacle West
 150,000
 150,000
Equity infusion from Pinnacle West150,000 150,000 150,000 
Noncontrolling interests(22,744) (22,744) (22,744)Noncontrolling interests(21,255)(21,255)(22,743)
Net cash flow provided by (used for) financing activities133,144
 (75,499) 244,434
Net cash provided by financing activitiesNet cash provided by financing activities314,097 477,944 404,329 
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS4,462
 (8,144) 5,011
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS(5,332)(47,936)47,141 
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR5,707
 13,851
 8,840
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR9,374 57,310 10,169 
CASH AND CASH EQUIVALENTS AT END OF YEAR$10,169
 $5,707
 $13,851
CASH AND CASH EQUIVALENTS AT END OF YEAR$4,042 $9,374 $57,310 
 
The accompanying notes are an integral part of the financial statements.

110

ARIZONA PUBLIC SERVICE COMPANY
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
(dollars in thousands)
Common StockAdditional Paid-In CapitalRetained EarningsAccumulated Other Comprehensive Income (Loss)Noncontrolling InterestsTotal
SharesAmount
Balance, December 31, 201971,264,947 $178,162 $2,721,696 $3,011,927 $(35,522)$122,540 $5,998,803 
Equity infusion from Pinnacle West— 150,000 — — — 150,000 
Net income— — 568,028 — 19,493 587,521 
Other comprehensive loss— — — (5,396)— (5,396)
Dividends on common stock— — (363,000)— — (363,000)
Capital activities by noncontrolling interests— — — — (22,743)(22,743)
Balance, December 31, 202071,264,947 178,162 2,871,696 3,216,955 (40,918)119,290 6,345,185 
Equity infusion from Pinnacle West— 150,000 — — — 150,000 
Net income— — 632,279 — 17,224 649,503 
Other comprehensive income— — — 6,038 — 6,038 
Dividends on common stock— — (379,000)— — (379,000)
Capital activities by noncontrolling interests— — — — (21,255)(21,255)
Other— — — 
Balance, December 31, 202171,264,947 178,162 3,021,696 3,470,235 (34,880)115,260 6,750,473 
Equity infusion from Pinnacle West— 150,000 — — — 150,000 
Net income— — 524,929 — 17,224 542,153 
Other comprehensive income— — — 19,284 — 19,284 
Dividends on common stock— — (387,700)— — (387,700)
Capital activities by noncontrolling interests— — — — (21,255)(21,255)
Balance, December 31, 202271,264,947 $178,162 $3,171,696 $3,607,464 $(15,596)$111,229 $7,052,955 
 Common Stock Additional Paid-In Capital Retained Earnings Accumulated Other Comprehensive Income (Loss) Noncontrolling Interests Total
 Shares Amount          
Balance, December 31, 201671,264,947
 $178,162
 $2,421,696
 $2,331,245
 $(25,423) $132,290
 $5,037,970
              
Equity infusion from Pinnacle West  
 150,000
 
 
 
 150,000
Net income  
 
 504,309
 
 19,493
 523,802
Other comprehensive loss  
 
 
 (1,560) 
 (1,560)
Dividends on common stock  
 
 (301,600) 
 
 (301,600)
Capital activities by noncontrolling interests  
 
 
 
 (22,743) (22,743)
Balance, December 31, 201771,264,947
 178,162
 2,571,696
 2,533,954
 (26,983) 129,040
 5,385,869
              
Equity infusion from Pinnacle West  
 150,000
 
 
 
 150,000
Net income  
 
 570,265
 
 19,493
 589,758
Other comprehensive income  
 
 
 4,914
 
 4,914
Dividends on common stock  
 
 (321,001) 
 
 (321,001)
Reclassifications of income tax effects related to new tax reform (a)  
 
 5,038
 (5,038) 
 
Capital activities by noncontrolling interests  
 
 
 
 (22,743) (22,743)
Balance, December 31, 201871,264,947
 178,162
 2,721,696
 2,788,256
 (27,107) 125,790
 5,786,797
              
Net income  
 
 565,271
 
 19,493
 584,764
Other comprehensive loss  
 
 
 (8,415) 
 (8,415)
Dividends on common stock  
 
 (341,600) 
 
 (341,600)
Capital activities by noncontrolling interests  
 
 
 
 (22,743) (22,743)
Balance, December 31, 201971,264,947
 $178,162
 $2,721,696
 $3,011,927
 $(35,522) $122,540
 $5,998,803


(a)     In 2018, the Company adopted new accounting guidance and elected to reclassify income tax effects of the Tax Act on
items within accumulated other comprehensive income to retained earnings.

The accompanying notes are an integral part of the financial statements.


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COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS




1.    Summary of Significant Accounting Policies


Description of Business and Basis of Presentation
 
Pinnacle West is a holding company that conducts business through its subsidiaries, APS, El Dorado, BCE and 4CA. APS, our wholly-owned subsidiary, is a vertically-integrated electric utility that provides either retail or wholesale electric service to substantially all of the state of Arizona, with the major exceptions of about one-half of the Phoenix metropolitan area, the Tucson metropolitan area and Mohave County in northwestern Arizona.  APS accounts for essentially all of our revenues and earnings and is expected to continue to do so.  El Dorado is an investment firm. BCE is a subsidiary that was formed in 2014 that focuses on growth opportunities that leverage the Company'sCompany’s core expertise in the electric energy industry. 4CA is a subsidiary that was formed in 2016 as a result of the purchase of El Paso'sPaso’s 7% interest in Four Corners. See Note 1110 for more information on 4CA matters.
 
Pinnacle West’s Consolidated Financial Statements include the accounts of Pinnacle West and our subsidiaries: APS, El Dorado, BCE and 4CA. APS’s Consolidated Financial Statements include the accounts of APS and certain VIEs relating to the Palo Verde sale leaseback.  Intercompany accounts and transactions between the consolidated companies have been eliminated.
 
We consolidate VIEsVariable Interest Entities (each a “VIE”) for which we are the primary beneficiary.  We determine whether we are the primary beneficiary of a VIE through a qualitative analysis that identifies which variable interest holder has the controlling financial interest in the VIE.  In performing our primary beneficiary analysis, we consider all relevant facts and circumstances, including the design and activities of the VIE, the terms of the contracts the VIE has entered into, and which parties participated significantly in the design or redesign of the entity.  We continually evaluate our primary beneficiary conclusions to determine if changes have occurred which would impact our primary beneficiary assessments.  We have determined that APS is the primary beneficiary of certain VIE lessor trusts relating to the Palo Verde sale leaseback, and therefore APS consolidates these entities. See Note 1917 for additional information. We have determined that Pinnacle West is the primary beneficiary of a captive insurance protected cell VIE. As of December 31, 2022, the captive cell’s activities are insignificant to our consolidated financial statements.
 
Our consolidated financial statements reflect all adjustments (consisting only of normal recurring adjustments, except as otherwise disclosed in the notes) that we believe are necessary for the fair presentation of our financial position, results of operations and cash flows for the periods presented.

Accounting Records and Use of Estimates
 
Our accounting records are maintained in accordance with accounting principles generally accepted in the United States of America ("GAAP"(“GAAP”).  The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenues and expenses during the reporting period.  Actual results could differ from those estimates.


112


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Regulatory Accounting
 
APS is regulated by the ACC and the FERC.  The accompanying financial statements reflect the rate-making policies of these commissions.  As a result, we capitalize certain costs that would be included as expense in the current period by unregulated companies.  Regulatory assets represent incurred costs that have been deferred because they are probable of future recovery in customer rates. Regulatory liabilities generally represent amounts collected in rates to recover costs expected to be incurred in the future or amounts collected in excess of costs incurred and are refundable to customers.
 
Management judgments include continually assessing the likelihood of future recovery of regulatory assets and/or a disallowance of part of the cost of recently completed plant, by considering factors such as applicable regulatory environment changes and recent rate orders to other regulated entities in the same jurisdiction.  This determination reflects the current political and regulatory climate in Arizona and is subject to change in the future.  If future recovery of costs ceases to be probable, the assets would be written off as a charge in current period earnings. Management judgments also include assessing the impact of potential Commission-ordered refunds to customers on regulatory liabilities.
 
See Note 43 for additional information.
 
Electric Revenues
 
On January 1, 2018, we adopted new revenue guidance ASU 2014-09, Revenue from contracts with customers; accordingly our 2019 and 2018 electric revenuesRevenues primarily consist of activities that are classified as revenues from contracts with customers. Our electric revenues generally represent a single performance obligation delivered over time. We have elected to apply the practical expedient that allows us to recognize revenue based on the amount to which we have a right to invoice for services performed.

We derive electric revenues primarily from sales of electricity to our regulated retail customers. Revenues related to the sale of electricity are generally recognized when service is rendered or electricity is delivered to customers. Unbilled revenues are estimated by applying an average revenue/kWh by customer class to the number of estimated kWhs delivered but not billed. Differences historically between the actual and estimated unbilled revenues are immaterial. We exclude sales taxes and franchise fees on electric revenues from both revenue and taxes other than income taxes.
 
Revenues from our regulated retail customers and non-derivative instruments are reported on a gross basis on Pinnacle West’s Consolidated Statements of Income. In the electricity business, some contracts to purchase electricity are netted against other contracts to sell electricity. This is called a "book-out"“book-out” and usually occurs for contracts that have the same terms (quantities, delivery points and delivery periods) and for which power does not flow. We net these book-outs, which reduces both wholesale revenues and fuel and purchased power costs.

Some of ourCertain cost recovery mechanisms aremay qualify as alternative revenue programs. For alternative revenue programs that meet specified accounting criteria, we recognize revenues when the specific events permitting billing of the additional revenues have been completed.

See Notes 2 and 43 for additional information.


113


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Allowance for Doubtful Accounts
 
The allowance for doubtful accounts represents our best estimate of existing accounts receivable and accrued unbilled revenues that will ultimately be uncollectible.uncollectible due to credit loss risk. The allowance includes a write-off component that is calculated by applying an estimated write-off factor to utilityretail electric revenues. The write-off factorsfactor used to estimate uncollectible accounts areis based upon consideration of both historical collections experience, the current and forecasted economic environment, changes to our collection policies, and management’s best estimate of future collections success given the existing collections environment.success. See Note 2.
 
Property, Plant and Equipment
 
Utility plant is the term we use to describe the business property and equipment that supports electric service, consisting primarily of generation, transmission, and distribution facilities.  We report utility plant at its original cost, which includes:
material and labor;
contractor costs;
capitalized leases;
construction overhead costs (where applicable); and
allowance for funds used during construction.

AFUDC.

Pinnacle West’s property, plant and equipment included in the December 31, 20192022, and 20182021 Consolidated Balance Sheets is composed of the following (dollars in thousands):

Property, Plant and Equipment:2019 2018
Generation$8,916,872
 $8,285,514
Transmission3,095,907
 3,033,579
Distribution6,690,697
 6,378,345
General plant1,132,816
 1,039,190
Plant in service and held for future use19,836,292
 18,736,628
Accumulated depreciation and amortization(6,637,857) (6,366,014)
Net13,198,435
 12,370,614
Construction work in progress808,133
 1,170,062
Palo Verde sale leaseback, net of accumulated depreciation101,906
 105,775
Intangible assets, net of accumulated amortization290,564
 262,902
Nuclear fuel, net of accumulated amortization123,500
 120,217
Total property, plant and equipment$14,522,538
 $14,029,570

Property, Plant and Equipment:20222021
Generation$9,563,145 $9,480,572 
Transmission3,589,456 3,402,016 
Distribution7,951,867 7,520,016 
General plant1,347,678 1,286,057 
Plant in service and held for future use22,452,146 21,688,661 
Accumulated depreciation and amortization(7,929,878)(7,504,603)
Net14,522,268 14,184,058 
Construction work in progress1,882,791 1,329,478 
Palo Verde sale leaseback, net of accumulated depreciation90,296 94,166 
Intangible assets, net of accumulated amortization258,880 273,693 
Nuclear fuel, net of accumulated amortization100,119 106,039 
Total property, plant and equipment$16,854,354 $15,987,434 

Property, plant and equipment balances and classes for APS are not materially different than Pinnacle West.

We expense the costs of plant outages, major maintenance and routine maintenance as incurred.  We charge retired utility plant to accumulated depreciation.  Liabilities associated with the retirement of tangible long-lived assets are recognized at fair value as incurred and capitalized as part of the related tangible long-lived assets.  Accretion of the liability due to the passage of time is an operating expense, and the capitalized cost is depreciated over the useful life of the long-lived asset.  See Note 1211 for additional information.
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COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


APS records a regulatory liability for the excess that has been recovered in regulated rates over the amount calculated in accordance with guidance on accounting for asset retirement obligations.AROs.  APS believes it is probable it will recover in regulated rates, the costs calculated in accordance with this accounting guidance.
 
We record depreciation and amortization on utility plant on a straight-line basis over the remaining useful life of the related assets.  The approximate remaining average useful lives of our utility property at December 31, 20192022, were as follows:
Fossil plantSteam generation1712 years;
Nuclear plant — 2225 years;
Other generation — 2118 years;
Transmission — 4038 years;
Distribution — 3433 years; and
General plant — 86 years.
 
Depreciation of utility property, plant and equipment is computed on a straight-line, remaining-life basis. Depreciation expense was $522$632 million in 2019, $4862022, $575 million in 2018,2021, and $453$553 million in 2017.2020. For the years 20172020 through 2019,2022, the depreciation rates ranged from a low of 0.18%1.37% to a high of 24.49%12.15%.  The weighted-average depreciation rate was 2.81%3.03% in 2019, 2.81%2022, 2.87% in 2018,2021, and 2.80%2.84% in 2017.2020.

Asset Retirement Obligations

APS has asset retirement obligationsAROs for its Palo Verde nuclear facilities and certain other generation assets.  The Palo Verde asset retirement obligationARO primarily relates to final plant decommissioning.  This obligation is based on the NRC’s requirements for disposal of radiated property or plant and agreements APS reached with the ACC for final decommissioning of the plant.  The non-nuclear generation asset retirement obligationsAROs primarily relate to requirements for removing portions of those plants at the end of the plant life or lease term and coal ash pond closures. Some of APS’s transmission and distribution assets have asset retirement obligationsAROs because they are subject to right of way and easement agreements that require final removal.  These agreements have a history of uninterrupted renewal that APS expects to continue.  As a result, APS cannot reasonably estimate the fair value of the asset retirement obligationARO related to such transmission and distribution assets. Additionally, APS has aquifer protection permits for some of its generation sites that require the closure of certain facilities at those sites.

See Note 1211 for further information on Asset Retirement Obligations.

Allowance for Funds Used During Construction
 
AFUDC represents the approximate net composite interest cost of borrowed funds and an allowed return on the equity funds used for construction of regulated utility plant.  Both the debt and equity components of AFUDC are non-cash amounts within the Consolidated Statements of Income.  Plant construction costs, including AFUDC, are recovered in authorized rates through depreciation when completed projects are placed into commercial operation.
 
AFUDC was calculated by using a composite rate of 6.98%5.75% for 2019, 7.03%2022, 6.75% for 2018,2021, and 6.68%6.72% for 2017.2020.  APS compounds AFUDC semi-annually and ceases to accrue AFUDC when construction work is completed, and the property is placed in service.


115


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS



On June 30, 2020, FERC issued an order granting a waiver request related to the existing AFUDC rate calculation beginning March 1, 2020, through February 28, 2021. On February 23, 2021, this waiver was extended until September 30, 2021. On September 21, 2021, it was further extended until March 21, 2022.  The order provided a simplified approach that companies may have elected to implement in order to minimize the significant distorted effect on the AFUDC formula which resulted from increased short-term debt financing during the COVID-19 pandemic.  APS adopted this simplified approach to computing the AFUDC composite rate by using a simple average of the actual historical short-term debt balances for 2019, instead of current period short-term debt balances, and left all other aspects of the AFUDC formula composite rate calculation unchanged. This change impacted the AFUDC composite rate in 2020 and 2021 but did not impact prior years or 2022.  Furthermore, the change in the composite rate calculation did not impact our accounting treatment for these costs. The change did not have a material impact on our financial statements.
Materials and Supplies
 
APS values materials, supplies and fossil fuel inventory using a weighted-average cost method.  APS materials, supplies and fossil fuel inventories are carried at the lower of weighted-average cost or market,net realizable value, unless evidence indicates that the weighted-average cost (even if in excess of market) will be recovered.
 
Fair Value Measurements
 
We apply recurring fair value measurements to cash equivalents, derivative instruments, investments held in the nuclear decommissioning trust and other special use funds. On an annual basis, we apply fair value measurements to plan assets held in our retirement and other benefits plans. Due to the short-term nature of short-term borrowings, the carrying values of these instruments approximate fair value.  Fair value measurements may also be applied on a nonrecurring basis to other assets and liabilities in certain circumstances such as impairments.  We also disclose fair value information for our long-term debt, which is carried at amortized cost. See Note 76 for additional information.
 
Fair value is the price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market which we can access for the asset or liability in an orderly transaction between willing market participants on the measurement date.  Inputs to fair value may include observable and unobservable data.  We maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value.
 
We determine fair market value using observable inputs such as actively-quoted prices for identical instruments when available.  When actively-quoted prices are not available for the identical instruments, we use other observable inputs, such as prices for similar instruments, other corroborative market information, or prices provided by other external sources.  For options, long-term contracts, and other contracts for which observable price data are not available, we use models and other valuation methods, which may incorporate unobservable inputs to determine fair market value.

The use of models and other valuation methods to determine fair market value often requires subjective and complex judgment.  Actual results could differ from the results estimated through application of these methods.
See Note 1412 for additional information about fair value measurements.
116


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Derivative Accounting
 
We are exposed to the impact of market fluctuations in the commodity price and transportation costs of electricity, natural gas, coal and in interest rates.  We manage risks associated with market volatility by utilizing various physical and financial instruments including futures, forwards, options, and swaps.  As part of our overall risk management program, we may use derivative instruments to hedge purchases and sales of electricity and fuels.natural gas as well as interest rate risk.  The changes in market value of such contracts have a high correlation to price changes in the hedged transactions.  We also enter into derivative instruments for economic hedging purposes.  Contracts that have the same terms (quantities, delivery points and delivery periods) and for which power does not flow are netted, which reduces both revenues and fuel and purchased power expenses in our Consolidated Statements of Income, but does not impact our financial condition, net income, or cash flows.
 
We account for our derivative contracts in accordance with derivatives and hedging guidance, which requires all derivatives not qualifying for a scope exception to be measured at fair value on the balance sheet as

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


either assets or liabilities.  Transactions with counterparties that have master netting arrangements are reported net on the balance sheet.  See Note 1715 for additional information about our derivative instruments.
 
Loss Contingencies and Environmental Liabilities
 
Pinnacle West and APS are involved in certain legal and environmental matters that arise in the normal course of business.  Contingent losses and environmental liabilities are recorded when it is determined that it is probable that a loss has occurred, and the amount of the loss can be reasonably estimated.  When a range of the probable loss exists and no amount within the range is a better estimate than any other amount, Pinnacle West and APS record a loss contingency at the minimum amount in the range.  Unless otherwise required by GAAP, legal fees are expensed as incurred.
 
Retirement Plans and Other Postretirement Benefits
 
Pinnacle West sponsors a qualified defined benefit and account balance pension plan for the employees of Pinnacle West and its subsidiaries.subsidiaries, in addition to a non-qualified pension plan.  We also sponsor another postretirement benefit plan for the employees of Pinnacle West and its subsidiaries that provides medical and life insurance benefits to retired employees.  Pension and other postretirement benefit expense are determined by actuarial valuations, based on assumptions that are evaluated annually.  See Note 87 for additional information on pension and other postretirement benefits.
 
Nuclear Fuel
 
APS amortizes nuclear fuel by using the unit-of-production method.  The unit-of-production method is based on actual physical usage.  APS divides the cost of the fuel by the estimated number of thermal units it expects to produce with that fuel.  APS then multiplies that rate by the number of thermal units produced within the current period.  This calculation determines the current period nuclear fuel expense.
 
APS also charges nuclear fuel expense for the interim storage and permanent disposal of spent nuclear fuel.  The DOE is responsible for the permanent disposal of spent nuclear fuel and charged APS $0.001
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COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


$0.001 per kWh of nuclear generation through May 2014, at which point the DOE reduced the fee to zero.  In accordance with a settlement agreement with the DOE in August 2014 for interim storage, we now accrueaccrued a receivable and an offsetting regulatory liability through the settlement period endingwhich ended December of 2019.2022. See Note 1110 for information on spent nuclear fuel disposal costs.
 
Income Taxes
 
Income taxes are provided using the asset and liability approach prescribed by guidance relating to accounting for income taxes and are based on currently enacted tax rates.  We file our federal income tax return on a consolidated basis, and we file our state income tax returns on a consolidated or unitary basis.  In accordance with our intercompany tax sharing agreement, federal and state income taxes are allocated to each first-tier subsidiary as though each first-tier subsidiary filed a separate income tax return.  Any difference between that method and the consolidated (and unitary) income tax liability is attributed to the parent company.  The income tax accounts reflect the tax and interest associated with management’s estimate of the largest amount of tax benefit that is greater than 50% likely of being realized upon settlement for all known and measurable tax exposures. See Note 54 for additional discussion.
 

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Cash and Cash Equivalents
 
We consider cash equivalents to be highly liquid investments with a remaining maturity of three months or less at acquisition.

The following table summarizes supplemental Pinnacle West cash flow information for each of the last three years (dollars in thousands):
 Year ended December 31,
 202220212020
Cash paid (received) during the period for:   
Income taxes, net of refunds$46,227 $229 $(3,019)
Interest, net of amounts capitalized245,271 227,584 216,951 
Significant non-cash investing and financing activities:   
Accrued capital expenditures$114,999 $167,733 $113,502 
Dividends declared but not paid97,895 95,988 93,531 
 Year ended December 31,
 2019 2018 2017
Cash paid during the period for: 
  
  
Income taxes, net of refunds$12,535
 $21,173
 $2,186
Interest, net of amounts capitalized218,664
 208,479
 189,288
Significant non-cash investing and financing activities: 
  
  
Accrued capital expenditures$141,297
 $132,620
 $130,404
Dividends declared but not paid87,982
 82,675
 77,667
Right-of-use operating lease assets obtained in exchange for operating lease liabilities11,262
 
 
Sale of 4CA 7% interest in Four Corners
 68,907
 

The following table summarizes supplemental APS cash flow information for each of the last three years (dollars in thousands):
 Year ended December 31,
 202220212020
Cash paid during the period for:   
Income taxes, net of refunds$95,985 $19,783 $41,176 
Interest, net of amounts capitalized227,159 217,749 206,328 
Significant non-cash investing and financing activities:   
Accrued capital expenditures$116,533 $167,657 $113,502 
Dividends declared but not paid97,900 96,000 93,500 
 Year ended December 31,
 2019 2018 2017
Cash paid (received) during the period for: 
  
  
Income taxes, net of refunds$(15,042) $77,942
 $(14,098)
Interest, net of amounts capitalized204,261
 196,419
 184,210
Significant non-cash investing and financing activities: 
  
  
Accrued capital expenditures$141,297
 $132,620
 $130,057
Dividends declared but not paid88,000
 82,700
 77,700
Right-of-use operating lease assets obtained in exchange for operating lease liabilities11,262
 
 


118


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Intangible Assets
 
We have no goodwill recorded and have separately disclosed other intangible assets, primarily APS'sAPS’s software, on Pinnacle West’s Consolidated Balance Sheets. The intangible assets are amortized over their finite useful lives.  Amortization expense was $66$84 million in 2019, $682022, $80 million in 2018,2021, and $72$70 million in 2017.2020.  Estimated amortization expense on existing intangible assets over the next five years is $68 million in 2020, $52 million in 2021, $41 million in 2022, $32$81 million in 2023, and $22$60 million in 2024.2024, $48 million in 2025, $33 million in 2026, and $14 million in 2027.  At December 31, 2019,2022, the weighted-average remaining amortization period for intangible assets was 86 years.
 
Investments
 
El Dorado holds investments in both debt and equity securities.  Investments in debt securities are generally accounted for as held-to-maturity and investments in equity securities are accounted for using either

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


the equity method (if significant influence) or the measurement alternative for investments without readily determinable fair values (if less than 20% ownership and no significant influence).

Bright CanyonBCE holds investments in equity securities. Investments in equity securities are accounted for using either the equity method (if significant influence) or the measurement alternative for investments without readily determinable fair values (if less than 20% ownership and no significant influence).
 
Our investments in the nuclear decommissioning trusts, coal reclamation escrow accountaccounts and active union employee medical account, are accounted for in accordance with guidance on accounting for investments in debt and equity securities. See Notes 1412 and 2018 for more information on these investments.

Leases

We determine if an agreement is a lease at contract inception. A lease is defined as a contract, or part of a contract, that conveys the right to control the use of an identified asset for a period of time in exchange for consideration. To control the use of an identified asset an entity must have both a right to obtain substantially all of the benefits from the use of the asset and the right to direct the use of the asset. If we determine an agreement is a lease, and we are the lessee, we recognize a right-of-use lease asset and a lease liability at the lease commencement date. Lease liabilities are recognized based on the present value of the fixed lease payments over the lease term. To present value lease liabilities we use the implicit rate in the lease if the information is readily available, otherwise we use our incremental borrowing rate determined at lease commencement. Our incremental borrowing rate is based on the rate of interest we would have to borrow on a collateralized basis over a similar term an amount equal to the lease payments in a similar economic environment. When measuring right-of-use assets and lease liabilities we exclude variable lease payments, other than those that depend on an index or rate or are in-substance fixed payments. For short-term leases with terms of 12 months or less, we do not recognize a right-of-use lease asset or lease liability. We recognize operating lease expense using a straight-line pattern over the periods of use.

APS enters into purchased power contracts that may contain leases. This occurs when a purchased power agreement designates a specific power plant, APS obtains substantially all of the economic benefits from the use of the plant and has the right to direct the use of the plant. Purchased power lease contracts may also include energy storage facilities. Lease costs relating to purchased power lease contracts are
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COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


reported in fuel and purchased power on the Consolidated Statements of Income and are subject to recovery under the PSA or RES. See Note 3. We also may enter into lease agreements related to vehicles, office space, land, and other equipment. See Note 8 for information on our lease agreements.

Business Segments
 
Pinnacle West’s reportable business segment is our regulated electricity segment, which consists of traditional regulated retail and wholesale electricity businesses (primarily electricity service to Native Load customers) and related activities and includes electricity generation, transmission, and distribution. All other segment activities are insignificant.

Preferred Stock

At December 31, 2019,2022, Pinnacle West had 10 million shares of serial preferred stock authorized with no par value, none of which was outstanding, and APS had 15,535,000 shares of various types of preferred stock authorized with $25, $50, and $100 par values, none of which was outstanding.

2.    Revenue
2.    Revenue

Sources of Revenue

The following table provides detail of Pinnacle West'sWest’s consolidated revenue disaggregated by revenue sources (dollars in thousands):
Year Ended December 31,Year Ended December 31,Year Ended December 31,
202220212020
Retail Electric Service
Residential$2,046,111 $1,913,324 $1,929,178 (a)
Non-Residential1,767,616 1,586,940 1,486,098 
Wholesale Energy Sales383,126 187,640 93,345 
Transmission Services for Others116,628 99,285 65,859 
Other Sources10,904 16,646 12,502 
Total Operating Revenues$4,324,385 $3,803,835 $3,586,982 
(a)     Residential revenues for the year ended December 31, 2020, reflect a $24 million reduction related to the Arizona Attorney General matter. See Note 10.
 Year Ended December 31, Year Ended December 31,
 2019 2018
Retail Electric Service   
Residential$1,761,122
 $1,867,370
Non-Residential1,509,514
 1,628,891
Wholesale Energy Sales121,805
 109,198
Transmission Services for Others62,460
 60,261
Other Sources16,308
 25,527
Total Operating Revenues$3,471,209
 $3,691,247



COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Retail Electric Revenue. Pinnacle West'sWest’s retail electric revenue is generated by our wholly ownedwholly-owned regulated subsidiary APS'sAPS’s sale of electricity to our regulated customers within the authorized service territory at tariff rates approved by the ACC and based on customer usage. Revenues related to the sale of electricity are generally recognized when service is rendered, or electricity is delivered to customers. The billing of electricity sales to individual customers is based on the reading of their meters. We obtain customers'customers’ meter data on a systematic basis throughout the month, and generally bill customers within a month from when service was provided. Customers are generally required to pay for services within 1521 days of when the services are billed. See “Allowance for Doubtful Accounts” discussion below for additional details regarding payment terms.

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COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS



Wholesale Energy Sales and Transmission Services for Others. Revenues from wholesale energy sales and transmission services for others represent energy and transmission sales to wholesale customers. These activities primarily consist of managing fuel and purchased power risks in connection with the cost of serving our retail customers'customers’ energy requirements. We may also sell generation into the wholesale markets generation that is not needed for APS’s retail load. Our wholesale activities and tariff rates are regulated by FERC.

Revenue Activities

Our revenues primarily consist of activities that are classified as revenues from contracts with customers. We derive our revenues from contracts with customers primarily from sales of electricity to our regulated retail customers. Revenues from contracts with customers also include wholesale and transmission activities. Our revenues from contracts with customers for the year ended December 31, 20192022, 2021 and 20182020 were $3,415$4,302 million, $3,760 million, and $3,644$3,533 million, respectively.

We have certain revenues that do not meet the specific accounting criteria to be classified as revenues from contracts with customers. For the year ended December 31, 20192022, 2021 and 2018,2020, our revenues that do not qualify as revenue from contracts with customers were $56$22 million, $44 million and $47$54 million, respectively. This relates primarilyamount includes revenues related to certain regulatory cost recovery mechanisms that are considered alternative revenue programs. We recognize revenue associated with alternative revenue programs when specific events permitting recognition are completed. Certain amounts associated with alternative revenue programs will subsequently be billed to customers; however, we do not reclassify billed amounts into revenue from contracts with customers. See Note 43 for a discussion of our regulatory cost recovery mechanisms.

Contract Assets and Liabilities from Contracts with Customers

There were no material contract assets, contract liabilities, or deferred contract costs recorded on the Consolidated Balance Sheets as of December 31, 20192022, and 2018.2021.


Allowance for Doubtful Accounts
The allowance for doubtful accounts represents our best estimate of accounts receivable and accrued unbilled revenues that will ultimately be uncollectible due to credit loss risk. The allowance includes a write-off component that is calculated by applying an estimated write-off factor to retail electric revenues. The write-off factor used to estimate uncollectible accounts is based upon consideration of historical collections experience, the current and forecasted economic environment, changes to our collection policies, and management’s best estimate of future collections success. We continue to monitor the impacts of our disconnection policies, payment arrangements, among other considerations impacting our estimated write-off factor, and allowance for doubtful accounts.


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COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS



The following table provides a rollforward of Pinnacle West’s allowance for doubtful accounts (dollars in thousands):
Year Ended December 31, 2022Year Ended December 31, 2021Year Ended December 31, 2020
Allowance for doubtful accounts, balance at beginning of period$25,354 $19,782 $8,171 
Bad debt expense17,006 22,251 20,633 
Actual write-offs(18,582)(16,679)(9,022)
Allowance for doubtful accounts, balance at end of period$23,778 $25,354 $19,782 
3.    New Accounting Standards
Standards Adopted3.    Regulatory Matters

2022 Retail Rate Case

APS filed an application with the ACC on October 28, 2022 (the “2022 Rate Case”) seeking an increase in 2019

ASU 2016-02, Leases

In February 2016, a new lease accounting standard was issued. This new standard supersedes the existing lease accounting model, and modifies both lessee and lessor accounting. The new standard requires a lessee to reflect most operating lease arrangementsannual retail base rates on the balance sheetdate rates become effective (“Day 1”) of a net $460 million. This Day 1 net impact represents a total base revenue deficiency of $772 million offset by recording proposed adjustor transfers of cost recovery to annual retail rates and adjustor mechanism modifications. The average annual customer bill impact of APS’s request on Day 1 is an increase of 13.6%.
The principal provisions of APS’s application are:

a right-of-use asset and a lease liability that is initially measured attest year comprised of twelve months ended June 30, 2022, adjusted as described below;
an original cost rate base of $10.5 billion, which approximates the presentACC-jurisdictional portion of the book value of lease payments. Amongutility assets, net of accumulated depreciation and other changes, credits;
the new standard also modifiesfollowing proposed capital structure and costs of capital:
Capital StructureCost of Capital
Long-term debt48.07 %3.85 %
Common stock equity51.93 %10.25 %
Weighted-average cost of capital7.17 %

a 1% return on the definitionincrement of fair value rate base above APS’s original cost rate base, as provided for by Arizona law;
a lease,rate of $0.038321 per kWh for the portion of APS’s retail base rates attributable to fuel and requires expanded lease disclosures. Sincepurchased power costs (“Base Fuel Rate”);
modification of its adjustment mechanisms including:
eliminate the issuance ofEnvironmental Improvement Surcharge and collect costs through base rates,
eliminate the new lease standard, additional lease related guidance has been issued relating to land easementsLost Fixed Cost Recovery mechanism and how entities may elect to account for these arrangements at transition, among other items. The new lease standardcollect costs through base rates and related amendments were effective for us on January 1, 2019, with early application permitted. The standard must be adopted using a modified retrospective approach with a cumulative-effect adjustment to the opening balance of retained earnings determined at eitherDemand Side Management Adjustment Charge (“DSMAC”),
maintain as inactive the date of adoption, orTax Expense Adjustor Mechanism,
maintain the earliest period presentedTransmission Cost Adjustment mechanism,
modify the performance incentive in the financial statements. The standard includes various optional practical expedients provided to facilitate transition. We adopted this standard,DSMAC, and related amendments, on January 1, 2019. See Note 9 for additional information.

122

ASU 2018-15, Internal-Use Software: Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract

In August 2018, a new accounting standard was issued that clarifies how customers in a cloud computing service arrangement should account for implementation costs associated with the arrangement. To determine which implementation costs should be capitalized, the new guidance aligns the accounting with existing guidance pertaining to internal-use software. As a result of this new standard, certain cloud computing service arrangement implementation costs will now be subject to capitalization and amortized on a straight-line basis over the cloud computing service arrangement term. The new standard was effective for us on January 1, 2020, with early application permitted, and may have been applied using either a retrospective or prospective transition approach. On July 1, 2019, we early adopted this new accounting standard using the prospective approach. The adoption did not have a material impact on our financial statements.

Standard Adopted in 2020

ASU 2016-13, Financial Instruments: Measurement of Credit Losses

In June 2016, a new accounting standard was issued that amends the measurement of credit losses on certain financial instruments. The new standard requires entities to use a current expected credit loss model to measure impairment of certain investments in debt securities, trade accounts receivables, and other financial instruments. Since the issuance of the new standard, various guidance has been issued that amends the new standard, including clarifications of certain aspects of the standard and targeted transition relief, among other changes. The new standard and related amendments were effective for us on January 1, 2020, and must be adopted using a modified retrospective approach for certain aspects of the standard, and a prospective approach for other aspects of the standard. We adopted the standard on January 1, 2020 using primarily the modified retrospective approach. While the adoption of this guidance changed our process and methodology for determining credit losses, these changes did not have a material impact on our financial statements.



COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS




modify the Renewable Energy Adjustment Charge to include recovery of capital carrying costs of APS owned renewable and storage resources;
4.    Regulatory Matterschanges to its limited-income program, including a second tier to provide an additional discount for customers with greater need; and
twelve months of post-Test Year plant investments to reflect used and useful projects that will be placed into service prior to July 1, 2023.

APS requested that the increase become effective December 1, 2023. The hearing for this rate case is currently scheduled to begin in August 2023. APS cannot predict the outcome of its request.

2019 Retail Rate Case Filing with the Arizona Corporation Commission

On October 31, 2019, APS filed an application with the ACC foron October 31, 2019 (the “2019 Rate Case”) seeking an annual increase in annual retail base rates of $69 million. This amount includes recovery of the deferral and rate base effects of the Four Corners Power Plant (“Four Corners”) selective catalytic reduction ("SCR"(“SCR”) project that is currentlywas the subject of a separate proceeding (see “SCRproceeding. See “Four Corners SCR Cost Recovery” below).below. It also reflects a net credit to base rates of approximately $115 million primarily due to the prospective inclusion of rate refunds currently provided through the TEAM.Tax Expense Adjustment Mechanism (“TEAM”). The proposed total annual revenue increase in APS'sAPS’s application is $184 million. The average annual customer bill impact of APS’s request is an increase of 5.6% (the average annual bill impact for a typical APS residential customer is 5.4%).

The principal provisions of APS'sAPS’s application are:were:

a test year comprised of twelve12 months ended June 30, 2019, adjusted as described below;
an original cost rate base of $8.87 billion, which approximates the ACC-jurisdictional portion of the book value of utility assets, net of accumulated depreciation and other credits;
the following proposed capital structure and costs of capital:
  Capital Structure Cost of Capital 
Long-term debt 45.3 %4.10 %
Common stock equity 54.7 %10.15 %
Weighted-average cost of capital   7.41 %

 
a 1% return on the increment of fair value rate base above APS’s original cost rate base, as provided for by Arizona law;
a rate of $0.030168 per kWh for the Base Fuel Rate;
authorization to defer until APS'sAPS’s next general rate case the increase or decrease in its Arizona property taxes attributable to tax rate changes after the date the rate application is adjudicated;
a number of proposed rate and program changes for residential customers, including:
a super off-peak period during the winter months for APS’s time-of-use with demand rates;
additional $1.25 million in funding for APS's limited-income crisis bill program; and
a flat bill/subscription rate pilot program;
a super off-peak period during the winter months for APS’s time-of-use with demand rates;
additional $1.25 million in funding for APS’s limited-income crisis bill program; and
a flat bill/subscription rate pilot program;
proposed rate design changes for commercial customers, including an experimental program designed to provide access to market pricing for up to 200 MWmegawatt (“MW”) of medium and large commercial customers;

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COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS



recovery of the deferral and rate base effects of the construction and operating costs of the Ocotillo modernization project (see discussion below of the 2017 Settlement Agreement); and
continued recovery of the remaining investment and other costs related to the retirement and closure of the Navajo PlantGenerating Station (the “Navajo Plant”) (see "Navajo Plant"“Navajo Plant” below).

On October 2, 2020, the ACC Staff, the Residential Utility Consumer Office (“RUCO”) and other intervenors filed their initial written testimony with the ACC. The ACC Staff recommended, among other things, (i) an $89.7 million revenue increase, (ii) an average annual customer bill increase of 2.7%, (iii) a return on equity of 9.4%, (iv) a 0.3% or, as an alternative, a 0% return on the increment of fair value rate base greater than original cost, (v) the recovery of the deferral and rate base effects of the construction and operating costs of the Four Corners SCR project and (vi) the recovery of the rate base effects of the construction and ongoing consideration of the deferral of the Ocotillo modernization project. RUCO recommended, among other things, (i) a $20.8 million revenue decrease, (ii) an average annual customer bill decrease of 0.63%, (iii) a return on equity of 8.74%, (iv) a 0% return on the increment of fair value rate base, (v) the nonrecovery of the deferral and rate base effects of the construction and operating costs of the Four Corners SCR project pending further consideration, and (vi) the recovery of the deferral and rate base effects of the construction and operating costs of the Ocotillo modernization project.

The filed ACC Staff and intervenor testimony include additional recommendations, some of which materially differ from APS’s filed application. On November 6, 2020, APS requestedfiled its rebuttal testimony and the principal provisions which differ from its initial application include, among other things, (i) a $169 million revenue increase, (ii) average annual customer bill increase of 5.14%, (iii) return on equity of 10%, (iv) return on the increment of fair value rate base of 0.8%, (v) new cost recovery adjustor mechanism, the Advanced Energy Mechanism (“AEM”), to enable more timely recovery of clean investments as APS pursues its clean energy commitment, (vi) recognition that securitization is a potentially useful financing tool to recover the remaining book value of retiring assets and effectuate a transition to a cleaner energy future that APS intends to pursue, provided legislative hurdles are addressed, and (vii) a Coal Community Transition (“CCT”) plan related to the closure or future closure of coal-fired generation facilities, of which $25 million would be funds that are not recoverable through rates with a proposal that the remainder be funded by customers over 10 years.

The CCT plan includes the following proposed components: (i) $100 million that will be paid over 10 years to the Navajo Nation for a sustainable transition to a post-coal economy, which would be funded by customers, (ii) $1.25 million that will be paid over five years to the Navajo Nation to fund an economic development organization, which would be funds not recoverable through rates, (iii) $10 million to facilitate electrification projects within the Navajo Nation, which would be funded equally by funds not recoverable through rates and by customers, (iv) $2.5 million per year in transmission revenue sharing to be paid to the Navajo Nation beginning after the closure of the Four Corners through 2038, which would be funds not recoverable through rates, (v) $12 million that will be paid over five years to the Navajo County Communities surrounding Cholla Power Plant, which would primarily be funded by customers, and (vi) $3.7 million that will be paid over five years to the Hopi Tribe related to APS’s ownership interests in the Navajo Plant, which would primarily be funded by customers. The commitment of funds that would not be recoverable through rates of $25 million were recognized in our December 31, 2020 financials. In 2021, APS committed an additional $0.9 million to be paid to the Hopi Tribe related to APS’s ownership interests in the Navajo Plant, and this amount was recognized in its December 31, 2021 financials.

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On December 4, 2020, the ACC Staff and intervenors filed surrebuttal testimony. The ACC Staff reduced its recommended rate increase become effective December 1, 2020.to $59.8 million, or an average annual customer bill increase of 1.82%. In RUCO’s surrebuttal, the recommended revenue decrease changed to $50.1 million, or an average annual customer bill decrease of 1.52%. The hearing concluded on March 3, 2021, and the post-hearing briefing concluded on April 30, 2021.

On August 2, 2021, the Administrative Law Judge issued a Recommended Opinion and Order in the 2019 Rate Case (the “2019 Rate Case ROO”) and issued corrections on September 10 and September 20, 2021. The 2019 Rate Case ROO recommended, among other things, (i) a $111 million decrease in annual revenue requirements, (ii) a return on equity of 9.16%, (iii) a 0.30% return on the increment of fair value rate base greater than original cost, with total fair value rate of return further adjusted to include a 0.03% reduction to return on equity resulting in an effective fair value rate of return of 4.95%, (iv) the nonrecovery of the deferral and rate base effects of the operating costs and construction of the Four Corners SCR project (see “Four Corners SCR Cost Recovery” below for thisadditional information), (v) the recovery of the deferral and rate base effects of the operating costs and construction of the Ocotillo modernization project, which includes a reduction in the return on the deferral, (vi) a 15% disallowance of annual amortization of Navajo Plant regulatory asset recovery, (vii) the denial of the request to defer, until APS’s next general rate case, is currently scheduledthe increase or decrease in its Arizona property taxes attributable to begintax rate changes, and (viii) a collaborative process to review and recommend revisions to APS’s adjustment mechanisms within 12 months after the date of the decision. The 2019 Rate Case ROO also recommended that the CCT plan include the following components: (i) $50 million that will be paid over 10 years to the Navajo Nation, (ii) $5 million that will be paid over five years to the Navajo County Communities surrounding Cholla Power Plant, and (iii) $1.675 million that will be paid to the Hopi Tribe related to APS’s ownership interests in July 2020.the Navajo Plant. These amounts would be recoverable from APS’s customers through the Arizona Renewable Energy Standard and Tariff (“RES”) adjustment mechanism. APS filed exceptions on September 13, 2021, regarding the disallowance of the SCR cost deferrals and plant investments that was recommended in the 2019 Rate Case ROO, among other issues.

On October 6, 2021 and October 27, 2021, the ACC voted on various amendments to the 2019 Rate Case ROO that would result in, among other things, (i) a return on equity of 8.70%, (ii) the recovery of the deferral and rate base effects of the operating costs and construction of the Four Corners SCR project, with the exception of $215.5 million (see “Four Corners SCR Cost Recovery” below), (iii) that the CCT plan include the following components: (a) a payment of $1 million to the Hopi Tribe within 60 days of the 2019 Rate Case decision, (b) a payment of $10 million over three years to the Navajo Nation, (c) a payment of $0.5 million to the Navajo County communities within 60 days of the 2019 Rate Case decision, (d) up to $1.25 million for electrification of homes and businesses on the Hopi reservation, and (e) up to $1.25 million for the electrification of homes and businesses on the Navajo Nation reservation. These payments and expenditures are attributable to the future closures of Four Corners and Cholla, along with the prior closure of the Navajo Plant and all ordered payments and expenditures would be recoverable through rates, and (iv) a change in the residential on-peak time-of-use period from 3 p.m. to 8 p.m. to 4 p.m. to 7 p.m. Monday through Friday, excluding holidays. The 2019 Rate Case ROO, as amended, results in a total annual revenue decrease for APS of $4.8 million, excluding temporary CCT payments and expenditures. On November 2, 2021, the ACC approved the 2019 Rate Case ROO, as amended. On November 24, 2021, APS filed an application for rehearing of the 2019 Rate Case with the ACC and the application was deemed denied on December 15, 2021, as the ACC did not act upon it. On December 17, 2021, APS filed its Notice of Direct Appeal at the Arizona Court of Appeals and a Petition for Special Action with the Arizona Supreme Court, requesting review of the disallowance of $215.5 million of Four
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COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Corners SCR plant investments and deferrals (see “Four Corners SCR Cost Recovery” below for additional information) and the 20 basis point penalty reduction to the return on equity. On February 8, 2022, the Arizona Supreme Court declined to accept jurisdiction on APS’s Petition for Special Action. The Arizona Court of Appeals heard oral arguments on November 30, 2022. The Court took the matter under advisement and will issue its decision in due course. APS cannot predict the outcome of its request.this proceeding.

Consistent with the 2019 Rate Case decision, APS implemented the new rates effective as of December 1, 2021. In addition, the ACC ordered extensive compliance and reporting obligations and will be continuing to explore whether penalties or rebates would be owed to certain customers. APS completed the implementation of the new on-peak hours for residential customers before the September 1, 2022 deadline. APS cannot predict if the ACC will take any further action on this matter.

Additionally, consistent with the 2019 Rate Case decision, as of April 2022, APS has completed the following payments that will be recoverable through rates related to the CCT: (i) $3.33 million to the Navajo Nation; (ii) $0.5 million to the Navajo County communities; and (iii) $1 million to the Hopi Tribe. Consistent with APS’s commitment to the impacted communities, APS has also completed the following payments: (i) $0.5 million to the Navajo Nation for CCT; (ii) $1.1 million to the Navajo County Communities for CCT and economic development; and (iii) $1.25 million to the Hopi Tribe for CCT and economic development. The ACC has also authorized $1.25 million to be recovered through rates for electrification of homes and businesses on both the Navajo Nation and Hopi reservation. Expenditure of the recoverable funds for electrification of homes and businesses on the Navajo Nation and the Hopi reservations is contingent upon completion of a census of the unelectrified homes and businesses in each that are also within APS service territory.

Matter of Impact of the Closures of Fossil-Based Generation Plan on Impacted Communities

On September 28, 2022, ACC Staff filed their staff report in the Matter of Impact of the Closures of Fossil-Based Generation Plan on Impacted Communities. APS and other interested parties filed comments on the report. On October 21, 2022, ACC Staff filed a revised report and proposed order. The revised report and proposed order recommended that funds for CCT shall not be collected from rate payers. On December 8, 2022, the ACC voted against ACC Staff’s proposed order. APS cannot predict if the ACC will take any further action on this matter.

Information Technology ACC Investigation

On December 16, 2021, the ACC opened an investigation into various matters related to APS’s Information Technology department, including information about technology projects, costs, vendor management leadership and decision making. APS is cooperating with the investigation. APS cannot predict the outcome of this matter.
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2016 Retail Rate Case Filing withand the Arizona Corporation Commission2017 Settlement Agreement
 
On June 1, 2016, APS filed an application with the ACC for an annual increase in retail base rates. On March 27, 2017, a majority of the stakeholders in the general retail rate case, including the ACC Staff, the Residential Utility Consumer Office,RUCO, limited income advocates and private rooftop solar organizations signed a settlement agreement (the "2017“2017 Settlement Agreement"Agreement”) and filed it with the ACC. The 2017 Settlement Agreement provides for, among other things, a net retail base rate increase of $94.6 million, excluding the transfer of adjustor balances, consisting of: (1) a non-fuel, non-depreciation, base rate increase of $87.2 million per year; (2) a base rate decrease of $53.6 million attributable to reduced fuel and purchased power costs; and (3) a base rate increase of $61.0 million due to changes in depreciation schedules. The average annual customer bill impact under the 2017 Settlement Agreement was calculated as an increase of 3.28% (the average annual bill impact for a typical APS residential customer was calculated as an increase of 4.54%).

Other key provisions of the agreement include the following:

an agreement by APS not to file another general retail rate case application before June 1, 2019;
an authorized return on common equity of 10.0%;
a capital structure comprised of 44.2% debt and 55.8% common equity;
a cost deferral order for potential future recovery in APS’s next general retail rate case for the construction and operating costs APS incurs for its Ocotillo modernization project;
a cost deferral and procedure to allow APS to request rate adjustments prior to its next general retail rate case related to its share of the construction costs associated with installing SCR equipment at Four Corners;
a deferral for future recovery (or credit to customers) of the Arizona property tax expense above or below a specified test year level caused by changes to the applicable Arizona property tax rate;
an expansion of the PSA to include certain environmental chemical costs and third-party energy storage costs;
a new AZ Sun II program (now known as APS Solar Communities) for utility-owned solar distributed generation ("DG") with the purpose of expanding access to rooftop solar for low and moderate income Arizonans, recoverable through the RES, to be no less than $10 million per year in capital costs, and not more than $15 million per year in capital costs;
an increase to the per kWh cap for the environmental improvement surcharge from $0.00016 to $0.00050 and the addition of a balancing account;
rate design changes, including:
a change in the on-peak time of use period from noon - 7 p.m. to 3 p.m. - 8 p.m. Monday through Friday, excluding holidays;
non-grandfathered DG customers would be required to select a rate option that has time of use rates and either a new grid access charge or demand component;
a Resource Comparison Proxy (“RCP”) for exported energy of 12.9 cents per kWh in year one; and

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


an agreement by APS not to pursue any new self-build generation (with certain exceptions) having an in-service date prior to January 1, 2022 (extended to December 31, 2027 for combined-cycle generating units), unless expressly authorized by the ACC.

Through a separate agreement, APS, industry representatives, and solar advocates committed to stand by the 2017 Settlement Agreement and refrain from seeking to undermine it through ballot initiatives, legislation or advocacy at the ACC.

On August 15, 2017, the ACC approved (by a vote of 4-1), the 2017 Settlement Agreement without material modifications.  Onmodifications, and on August 18, 2017, the ACC issued a final written Opinion and Order reflecting its decision in APS’s general retail rate case (the "2017“2017 Rate Case Decision"Decision”), which is subject to requests for rehearing and potential appeal.. The new rates went into effect on August 19, 2017.

On January 3, 2018, an APS customer filedSee “Rate Plan Comparison Tool and Investigation” below for information regarding a petition with the ACC that was determined by the ACC Staff to be a complaint filed pursuant to Arizona Revised Statute §40-246 (the “Complaint”)review and not a request for rehearing. Arizona Revised Statute §40-246 requires the ACC to hold a hearing regarding any complaint alleging that a public service corporation is in violation of any commission order or that the rates being charged are not just and reasonable if the complaint is signed by at least NaN customers of the public service corporation. The Complaint alleged that APS is “in violation of commission order” [sic]. On February 13, 2018, the complainant filed an amended Complaint alleging that the rates and charges in the 2017 Rate Case Decision are not just and reasonable.  The complainant requested that the ACC hold a hearing on the amended Complaint to determine if the average bill impact on residential customers of the rates and charges approved in the 2017 Rate Case Decision is greater than 4.54% (the average annual bill impact for a typical APS residential customer estimated by APS) and, if so, what effect the alleged greater bill impact has on APS's revenues and the overall reasonableness and justness of APS's rates and charges, in order to determine if there is sufficient evidence to warrant a full-scale rate hearing.  The ACC held a hearing on this matter beginning in September 2018 and the hearing was concluded on October 1, 2018. On April 9, 2019, the Administrative Law Judge issued a Recommended Opinion and Order recommending that the Complaint be dismissed. The ACC considered the matter at its April and May 2019 open meetings, but no decision was issued. On July 3, 2019, the Administrative Law Judge issued an amendmentinvestigation pertaining to the Recommended Opinion and Order that incorporated the requirements of the rate review of the 2017 Rate Case Decision (see below discussion regarding the rate review). On July 10, 2019, the ACC reconsidered the matter and adopted the Administrative Law Judge's amended Recommended Opinion and Order along with several ACC Commissioner amendments and an amendment incorporating the results of the rate review and resolved the Complaint.

On December 24, 2018, certain ACC Commissioners filed a letter stating that because the ACC had received a substantial number of complaints that the rate increase authorized by the 2017 Rate Case Decision was much more than anticipated, they believe there is a possibility that APS is earning more than was authorized by the 2017 Rate Case Decision.  Accordingly, the ACC Commissioners requested the ACC Staffplan comparison tool offered to perform a rate review of APS using calendar year 2018 as a test year and file a report by May 3, 2019. The ACC Commissioners also asked the ACC Staff to evaluate APS’s efforts to educate its customers regarding the new rates approved in the 2017 Rate Case Decision. On April 23, 2019, the ACC Staff indicated that they would need additional time beyond May 3, 2019 to file the requested report.

On June 4, 2019, the ACC Staff filed a proposed order regarding the rate review of the 2017 Rate Case Decision. On June 11, 2019, the ACC Commissioners approved the proposed ACC Staff order with amendments. The key provisions of the amended order include the following:

APS must file a rate case no later than October 31, 2019, using a June 30, 2019 test-year;

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


until the conclusion of the rate case being filed no later than October 31, 2019, APS must provide information on customer bills that shows how much a customer would pay on their most economical rate given their actual usage during each month;
APS customers can switch rate plans during an open enrollment period of six months;and other related issues.
APS must identify customers whose bills have increased by more than 9% and that are not on the most economical rate and provide such customers with targeted education materials and an opportunity to switch rate plans;
APS must provide grandfathered net metering customers on legacy demand rates an opportunity to switch to another legacy rate to enable such customers to fully benefit from legacy net metering rates;
APS must fund and implement a supplemental customer education and outreach program to be developed with and administered by ACC Staff and a third-party consultant; and
APS must fund and organize, along with the third-party consultant, a stakeholder group to suggest better ways to communicate the impact of changes to adjustor cost recovery mechanisms (see below for discussion on cost recovery mechanisms), including more effective ways to educate customers on rate plans and to reduce energy usage.

APS cannot predict the outcome or impact of the rate case filed on October 31, 2019. APS is assessing the impact to its financial statements of the implementation of the other key provisions of the amended order regarding the rate review and cannot predict at this time whether they will have a material impact on its financial position, results of operations or cash flows. 

Cost Recovery Mechanisms
 
APS has received regulatory decisions that allow for more timely recovery of certain costs outside of a general retail rate case through the following recovery mechanisms. See “2022 Retail Rate Case”above for proposed modifications of adjustment mechanisms in the 2022 rate case.
 
Renewable Energy Standard.  In 2006, the ACC approved the RES.  Under the RES, electric utilities that are regulated by the ACC must supply an increasing percentage of their retail electric energy sales from eligible renewable resources, including solar, wind, biomass, biogas and geothermal technologies.  In order to achieve these requirements, the ACC allows APS to include a RES surcharge as part of customer bills to recover the approved amounts for use on renewable energy projects.  Each year, APS is required to file a five-year implementation plan with the ACC and seek approval for funding the upcoming year’s RES budget. In 2015, the ACC revised the RES rules to allow the ACC to consider all available information, including the number of rooftop solar arrays in a utility’s service territory, to determine compliance with the RES.
On June 30, 2017, APS filed its 2018 RES Implementation Plan and proposed a budget of approximately $90 million.  APS’s budget request supports existing approved projects and commitments and includes the anticipated transfer of specific revenue requirements into base rates in accordance with the 2017 Settlement Agreement and also requests a permanent waiver of the residential distributed energy requirement for 2018 contained in the RES rules. APS's 2018 RES budget request was lower than the 2017 RES budget due in part to a certain portion of the RES being collected by APS in base rates rather than through the RES adjustor.

On November 20, 2017, APS filed an updated 2018 RES budget to include budget adjustments for APS Solar Communities (formerly known as AZ Sun II), which was approved as part of the 2017 Rate Case Decision. APS Solar Communities is a 3-year program authorizing APS to spend $10 million to $15 million in capital costs each year to install utility-owned DG systems for low to moderate income residential homes, non-profit entities, Title I schools and rural government facilities. The 2017 Rate Case Decision provided that all operations and maintenance expenses, property taxes, marketing and advertising expenses, and the capital

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


carrying costs for this program will be recovered through the RES. On June 12, 2018, the ACC approved the 2018 RES Implementation Plan including a waiver of the distributed energy requirements for the 2018 implementation year.

On June 29, 2018, APS filed its 2019 RES Implementation Plan and proposed a budget of approximately $89.9 million.  APS’s budget request supports existing approved projects and commitments and requests a permanent waiver of the residential distributed energy requirement for 2019 contained in the RES rules. On October 29, 2019, the ACC approved the 2019 RES Implementation Plan including a waiver of the residential distributed energy requirements for the 2019 implementation year.


On July 1, 2019, APS filed its 2020 RES Implementation Plan and proposed a budget of approximately $86.3 million. APS’s budget request supports existing approved projects and commitments and requests a permanent waiver of the RES residential distributed energy requirement for 2020. On September 23, 2020, containedthe ACC approved the 2020 RES Implementation Plan, including APS’s requested
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waiver of the residential distributed energy requirements for 2020. In addition, the ACC approved the implementation of a new pilot program that incentivizes Arizona households to install at-home battery systems. Recovery of the costs associated with the pilot will be addressed in the 2021 Demand Side Management Implementation Plan (“DSM Plan”).

On July 1, 2020, APS filed its 2021 RES rules.Implementation Plan and proposed a budget of approximately $84.7 million.  APS’s budget request supports existing approved projects and commitments and requests a permanent waiver of the RES residential distributed energy requirement for 2021. In the 2021 RES Implementation Plan, APS requested $4.5 million to meet revenue requirements associated with the APS Solar Communities program to complete installations delayed as a result of the COVID-19 pandemic in 2020. On June 7, 2021, the ACC approved the 2021 RES Implementation Plan, including APS’s requested waiver of the residential distributed energy requirements for 2021. As part of the approval, the ACC approved the requested budget and authorized APS to collect $68.3 million through the Renewable Energy Adjustment Charge to support APS’s RES programs.

In June 2021, the ACC adopted a clean energy rules package which would require APS to meet certain clean energy standards and technology procurement mandates, obtain approval for its action plan included in its IRP, and seek cost recovery in a rate process. Since the adopted clean energy rules differed substantially from the original Recommended Order and Opinion, supplemental rulemaking procedures were required before the rules could become effective. On January 26, 2022, the ACC reversed its prior decision and declined to send the final draft energy rules through the rulemaking process. Instead, the ACC opened a new docket to consider All-Source requests for proposals (“RFP”) requirements and the IRP process. See “Energy Modernization Plan” below for more information.

On July 1, 2021, APS filed its 2022 RES Implementation Plan and proposed a budget of approximately $93.1 million. APS filed an amended 2022 RES Implementation Plan on December 9, 2021, with a proposed budget of $100.5 million. This budget includes funding for programs to comply with the decision in the 2019 Rate Case, including the ACC authorizing spending $20 million to $30 million in capital costs for the APS Solar Communities program each year for a period of three years from the effective date of the 2019 Rate Case decision. APS’s budget proposal supports existing approved projects and commitments and requests a waiver of the RES residential and non-residential distributed energy requirements for 2022. On May 18, 2022, the ACC approved the 2022 RES Implementation Plan, including an amendment requiring a stakeholder working group convene to develop a community solar program for the Commission’s consideration at a future date. On September 23, 2022, APS filed a community solar proposal in compliance with the ACC order that was informed by a stakeholder working group. APS is proposing a small, pilot-scale program size of up to 140MW that would be selected through a competitive RFP. The ACC has not yet ruled on the 2020 RES Implementation Plan.

On July 2, 2019,proposal. However, on November 10, 2022, the ACC approved a bifurcated community solar process, directing ACC Staff issued draft rules, which proposeto develop a RES goalstatewide policy through additional stakeholder involvement and establishing a separate evidentiary hearing to define other policy components. The community solar program was deferred to the ACC’s Hearing Division so that a formal evidentiary hearing could be held to consider issues of 45% of retail energy served be renewables by 2035 and a goal of 20% of retail sales during peak demandsubstance related to be from clean energy resources by 2035.  The draft rules would also require a certain amount of the RES goal to be derived from distributed renewable storage, for which utilities would be required to offer performance-based incentives. Nuclear energy would be considered a clean resource under the draft rules. See "Energy Modernization Plan" below for more information.

On January 8, 2020, an ACC commissioner proposed replacing the current RES standard with a new standard ("KREST II"). KREST II sets a RES goal of 50% of retail energy to be served by renewables by 2028, 100% zero carbon resources by 2045, and a 35% energy efficiency resource standard by 2030 with a 10% demand response carve out.community solar. APS cannot predict the outcomeoutcomes of these future activities.

On July 1, 2022, APS filed its 2023 RES Implementation Plan and proposed a budget of approximately $86.2 million, excluding any funding offsets. This budget contains funding for programs to comply with Commission-approved initiatives, including the 2019 Rate Case decision. APS’s budget proposal supports existing approved projects and commitments and requests a waiver of the RES
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residential and non-residential distributed energy requirements for 2022. On November 10, 2022, the ACC approved the 2023 RES Implementation Plan, including APS’s requested waiver of the distributed energy requirement for 2023.

In response to an ACC inquiry, the ACC Staff filed a report providing the history of APS’s long-term purchased power contract of the 280 MW Concentrating Solar Power Plant. This report outlines alternative options that the ACC could pursue to address the costs of this matter.contract, which was executed in February 2008. On July 13, 2022, the ACC approved an option to take no action at this time.

Demand Side Management Adjustor Charge.The ACC EES requiresElectric Energy Efficiency Standards require APS to submit a Demand Side Management ImplementationDSM Plan ("DSM Plan") annually for review by and approval ofby the ACC. Verified energy savings from APS'sAPS’s resource savings projects can be counted toward compliance with the Electric Energy Efficiency Standards; however, APS is not allowed to count savings from systems savings projects toward determination of the achievement of performance incentives, nor may APS include savings from these system savings projects in the calculation of its LFCR mechanism (seeLost Fixed Cost Recovery (“LFCR”) mechanism. See below for discussion of the LFCR).LFCR.

On September 1, 2017, APS filed its 2018 DSM Plan, which proposes modifications to the demand side management portfolio to better meet system and customer needs by focusing on peak demand reductions, storage, load shifting and demand response programs in addition to traditional energy savings measures. The 2018 DSM Plan seeks a requested budget of $52.6 million and requests a waiver of the Electric Energy Efficiency Standard for 2018.   On November 14, 2017, APS filed an amended 2018 DSM Plan, which revised the allocations between budget items to address customer participation levels, but kept the overall budget at $52.6 million. The ACC has not yet ruled on the APS 2018 amended DSM Plan.

On December 31, 2018, APS filed its 2019 DSM Plan, which requests a budget of $34.1 million and continues APS's focus on DSM strategies such as peak demand reduction, load shifting, storage and electrification strategies. The ACC has not yet ruled on the APS 2019 DSM Plan.

On December 31, 2019, APS filed its 2020 DSM Plan, which requestsrequested a budget of $51.9 million and continues APS'scontinued APS’s focus on DSM strategies such as peak demand reduction, load shifting, storage and electrification strategies. The 2020 DSM Plan addressesaddressed all components of the pending 2018 and 2019 DSM plans,

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which enablesenabled the ACC to review the 2020 DSM Plan only. On May 15, 2020, APS filed an amended 2020 DSM Plan to provide assistance to customers experiencing economic impacts of the COVID-19 pandemic. The amended 2020 DSM Plan requested the same budget amount of $51.9 million. On September 23, 2020, the ACC approved the amended 2020 DSM Plan.

On April 17, 2020, APS filed an application with the ACC requesting a COVID-19 emergency relief package to provide additional assistance to its customers. On May 5, 2020, the ACC approved APS returning $36 million that had been collected through the DSM Adjustor Charge, but not allocated for current DSM programs, directly to customers through a bill credit in June 2020. APS has refunded approximately $43 million to customers. The additional $7 million over the ACC-approved amount was the result of the kWh credit being based on historic consumption which was different than actual consumption during the refund period. The difference was recorded to the DSM balancing account and was included in the 2021 DSM Implementation Plan, as described below.

On December 31, 2020, APS filed its 2021 DSM Implementation Plan, which requested a budget of $63.7 million and continued APS’s focus on DSM strategies, such as peak demand reduction, load shifting, storage and electrification strategies, as well as enhanced assistance to customers impacted economically by COVID-19. On April 6, 2021, APS filed an amended 2021 DSM Implementation Plan that proposed an additional one-time incentive for customers participating in the residential energy storage pilot program approved in the 2020 RES Implementation Plan. On July 13, 2021, the ACC approved the amended 2021 DSM Implementation Plan.

On December 17, 2021, APS filed its 2022 DSM Implementation Plan in accordance with an extension granted in 2021. The 2022 DSM requested a budget of $78.4 million and represents an increase of approximately $14 million in DSM spending above 2021. On November 10, 2022, the ACC approved the 2022 DSM Implementation Plan, including a proposed performance incentive. On November 30, 2022,
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APS filed its 2023 DSM Implementation Plan, which requested a budget of $88 million. The ACC has not yet ruled on the APS 20202023 DSM Implementation Plan.

Power Supply Adjustor Mechanism and Balance. The PSA provides for the adjustment of retail rates to reflect variations primarily in retail fuel and purchased power costs.  The PSA is subject to specified parameters and procedures, including the following:

APS records deferrals for recovery or refund to the extent actual retail fuel and purchased power costs vary from the Base Fuel Rate;

Anan adjustment to the PSA rate is made annually each February 1 (unless otherwise approved by the ACC) and goes into effect automatically unless suspended by the ACC;

Thethe PSA uses a forward-looking estimate of fuel and purchased power costs to set the annual PSA rate, which is reconciled to actual costs experienced for each PSA Year (February 1 through January 31) (see the following bullet point);

Thethe PSA rate includes (a) a “Forward Component,“forward component,” under which APS recovers or refunds differences between expected fuel and purchased power costs for the upcoming calendar year and those embedded in the Base Fuel Rate; (b) a “Historical Component,“historical component,” under which differences between actual fuel and purchased power costs and those recovered or refunded through the combination of the Base Fuel Rate and the Forward Component are recovered during the next PSA Year; and (c) a “Transition Component,“transition component,” under which APS may seek mid-year PSA changes due to large variances between actual fuel and purchased power costs and the combination of the Base Fuel Rate and the Forward Component; and

Thethe PSA rate may not be increased or decreased more than $0.004 per kWh in a year without permission of the ACC.

The following table shows the changes in the deferred fuel and purchased power regulatory asset for 20192022 and 20182021 (dollars in thousands):
 Twelve Months Ended
December 31,
 20222021
Beginning balance$388,148 $175,835 
Deferred fuel and purchased power costs — current period291,992 256,871 
Amounts charged to customers(219,579)(44,558)
Ending balance$460,561 $388,148 
 Twelve Months Ended
December 31,
 2019 2018
Beginning balance$37,164
 $75,637
Deferred fuel and purchased power costs — current period82,481
 78,277
Amounts charged to customers(49,508) (116,750)
Ending balance$70,137
 $37,164


The PSA rate for the PSA year beginning February 1, 2018 is $0.004555 per kWh, consisting of a Forward Component of $0.002009 per kWh and a Historical Component of $0.002546 per kWh. This represented a $0.004 per kWh increase over the August 19, 2017 PSA, the maximum permitted under the Plan of Administration for the PSA. This left $16.4 million of 2017 fuel and purchased power costs above this annual cap. These costs rolled over into the following year and were reflected in the 2019 reset of the PSA.


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The PSA rate for the PSA year beginning February 1, 2019 is $0.001658 per kWh, consisting of a Forward Component of $0.000536 per kWh and a Historical Component of $0.001122 per kWh. This represented a $0.002897 per kWh decrease compared to 2018.

On November 27, 2019, APS filed its PSA rate for the PSA year beginning February 1, 2020. That rate was $(0.000456) per kWh, andwhich consisted of a Forward Componentforward component of $(0.002086) per kWh and a Historical Componenthistorical component of $0.001630 per kWh. The 2020 PSA rate is a $0.002115 per kWh decrease compared to the 2019 PSA year. These rates went into effect as filed on February 1, 2020.

On November 30, 2020, APS filed its PSA rate for the PSA year beginning February 1, 2021. That rate was $0.003544 per kWh, which consisted of a forward component of $0.003434 per kWh and a historical component of $0.000110 per kWh. The 2021 PSA rate is a $0.004 per kWh increase compared to the 2020 PSA year, which is the maximum permitted under the Plan of Administration for the PSA. This left $215.9 million of fuel and purchased power costs above this annual cap which will be reflected in
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future year resets of the PSA. These rates were to be effective on February 1, 2021, but APS delayed the effectiveness of these rates until the first billing cycle of April 2021 due to concerns of the impact on customers during COVID-19. In March 2021, the ACC voted to implement the 2021 PSA rate on a staggered basis, with 50% of the rate increase taking effect in April 2021, and the remaining 50% taking effect in November 2021. The PSA rate implemented on April 1, 2021 was $0.001544 per kWh, which consisted of a forward component of $(0.004444) per kWh and a historical component of $0.005988 per kWh. On November 1, 2021, the remaining increase was implemented to a rate of $0.003544 per kWh and consisted of a forward component of $(0.004444) per kWh and a historical component of $0.007988 per kWh. As part of this approval, the ACC ordered ACC Staff to conduct a fuel and purchased power procurement audit to better understand the factors that contributed to the increase in fuel costs.

On April 1, 2022, the ACC filed a final report of its third-party audit findings regarding APS’s fuel and purchased power costs for the period January 2019 through January 2021. The report contains an in-depth review of APS’s fuel and purchased power contracts, its monthly fuel accounting activities, its forecasting and dispatching procedures, and its monthly PSA filings, among other fuel-related activities. The report finds that the APS’s fuel processing accounting practices, dispatching procedures, and procedures for hedging activity are reasonable and appropriate. The report includes several recommendations for the ACC’s consideration, including review of current contracts, maintenance schedules, and certain changes and improvements to the schedules in APS’s monthly PSA filings. On December 27, 2022, ACC Staff filed a proposed order supporting adoption of the recommendations in the third-party audit report, and the ACC approved the proposed order on February 22, 2023.

On November 30, 2021, APS filed its PSA rate for the PSA year beginning February 1, 2022. That rate was $0.007544 per kWh, which consisted of a forward component of $(0.004842) per kWh and a historical component of $0.012386 per kWh. The 2022 PSA rate is a $0.004 per kWh increase compared to the 2021 PSA year, which is the maximum permitted under the Plan of Administration for the PSA. These rates went into effect as filed on February 1, 2022.

On November 30, 2022, APS filed its PSA rate for the PSA year beginning February 1, 2023. To address the growing under-collected PSA balance, APS also requested that one of three different options be adopted, including a temporary or permanent increase of the annual cap to $0.006 per kWh. As of October 31, 2022, the amount in the PSA balancing account was approximately $456 million of fuel and purchased power costs. On February 23, 2023, the ACC approved a rate of $0.019074 per kWh that will continue until further notice of the ACC. The rate will become effective with the first billing cycle in March 2023 and is designed to bring the PSA balancing account to near-zero over a 24-month period. APS will also be required to notify the ACC when the PSA balancing account approaches $500,000.

On March 15, 2019, APS filed an application with the ACC requesting approval to recover the costs related to 2two energy storage power purchase tolling agreements through the PSA. ThisPSA, and on January 12, 2021, the ACC approved this application. On October 28, 2021, APS filed an application is pending withrequesting approval to recover costs related to three additional energy storage projects through the ACC.PSA once the systems are in service, and on December 16, 2021, the ACC approved this application. On February 22, 2022, APS cannot predictfiled an application requesting similar recovery through the outcomePSA for a solar plus energy storage project, and on April 13, 2022, the ACC approved this application. On December 21, 2022, APS filed an application requesting similar recovery through the PSA for a solar plus energy storage project, and on February 22, 2023, the ACC approved this application. For the applications that were approved by the ACC, the ACC has not yet ruled on prudency.
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Environmental Improvement Surcharge ("EIS"(“EIS”). The EIS permits APS to recover the capital carrying costs (rate of return, depreciation and taxes) plus incremental operations and maintenance expenses associated with environmental improvements made outside of a test year to comply with environmental standards set by federal, state, tribal, or local laws and regulations.  A filing is made on or before February 1st1 each year for qualified environmental improvements made duringsince the prior calendarrate case test year, and the new charge becomes effective April 1 unless suspended by the ACC.  There is an overall cap of $0.0005 per kWh (approximately $13 - 14million to $15 million per year).  APS’s February 1, 20202023 application requested an increase in the charge to $8.75$14.7 million, or $2.0$3.3 million over the prior-period charge, and it will become effective with the first billing cycle in effect forApril 2023 absent the 2019-2020 rate effective year.ACC taking action.

Transmission Rates, Transmission Cost Adjustor (“TCA”) and Other Transmission MattersIn July 2008, FERC approved a modification to APS’s Open Access Transmission Tariff to allow APS to move from fixed rates to a formula rate-setting methodology in order to more accurately reflect and recover the costs that APS incurs in providing transmission services.  A large portion of the rate represents charges for transmission services to serve APS'sAPS’s retail customers ("(“Retail Transmission Charges"Charges”).  In order to recover the Retail Transmission Charges, APS was previously required to file an application with, and obtain approval from, the ACC to reflect changes in Retail Transmission Charges through the TCA.  Under the terms of the settlement agreement entered into in 2012 regarding APS'sAPS’s rate case ("(“2012 Settlement Agreement"Agreement”), however, an adjustment to rates to recover the Retail Transmission Charges will be made annually each June 1 and will go into effect automatically unless suspended by the ACC.

The formula rate is updated each year effective June 1 on the basis of APS'sAPS’s actual cost of service, as disclosed in APS'sAPS’s FERC Form 1 report for the previous fiscal year.  Items to be updated include actual capital expenditures made as compared with previous projections, transmission revenue credits and other items.  The resolution of proposed adjustments can result in significant volatility in the revenues to be collected.  APS reviews the proposed formula rate filing amounts with the ACC Staff.  Any items or adjustments which are not agreed to by APS and the ACC Staff can remain in dispute until settled or litigated atwith FERC.  Settlement or litigated resolution of disputed issues could require an extended period of time and could have a significant effect on the Retail Transmission Charges because any adjustment, though applied prospectively, may be calculated to account for previously over- or under-collected amounts. The resolution of proposed adjustments can result in significant volatility in the revenues to be collected.

On March 7, 2018,17, 2020, APS made a filing to make modifications to its annual transmission formula to provide transmission customers the benefit of the reduced federal corporateadditional transparency for excess and deficient accumulated deferred income tax ratetaxes resulting from the Tax Cuts and Job Act beginning in(the “Tax Act”), as well as for future local, state, and federal statutory tax rate changes. APS amended its 2018March 17, 2020 filing on April 28, 2020, September 29, 2021, and October 27, 2021. In January 2022, FERC approved APS’s modifications to its annual transmission formula rate update filing. These modifications were approved by FERC on May 22, 2018 and reduced APS’s transmission rates compared to the rate that would have gone into effect absent these changes.formula.


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Effective June 1, 2018, APS's2020, APS’s annual wholesale transmission ratesrevenue requirement for all users of its transmission system decreased by approximately $22.7$6.1 million for the twelve-month12-month period beginning June 1, 20182020, in accordance with the FERCFERC-approved formula. Of this net amount, wholesale customer rates increased by $4.8 million and retail customer rates would have decreased by approximately $10.9 million. However, since changes in Retail Transmission Charges are reflected through the TCA after consideration of transmission recovery in retail base rates and the ACC approved formula.balancing account, the retail revenue requirement decreased by a total of $7.4 million, resulting in reductions to both residential and commercial
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rates. An adjustment to APS’s retail rates to recover FERC approved transmission charges went into effect automatically on June 1, 2018.2020.

Effective June 1, 2019, APS's2021, APS’s annual wholesale transmission ratesrevenue requirement for all users of its transmission system increased by approximately $4.9$4 million for the twelve-month12-month period beginning June 1, 20192021, in accordance with the FERC-approved formula. Of this net amount, wholesale customer rates decreased by approximately $3.2 million and retail customer rates would have increased by approximately $7.2 million. However, since changes in Retail Transmission Charges are reflected through the TCA after consideration of transmission recovery in retail base rates and the ACC approved balancing account, the retail revenue requirement decreased by $28.4 million, resulting in reductions to both residential and commercial rates. An adjustment to APS’s retail rates to recover FERC approvedFERC-approved transmission charges went into effect automatically on June 1, 2019.2021.

Effective June 1, 2022, APS’s annual wholesale transmission revenue requirement for all users of its transmission system decreased by approximately $33 million for the 12-month period beginning June 1, 2022, in accordance with the FERC-approved formula. Of this net amount, wholesale customer rates decreased by approximately $6.4 million and retail customer rates would have decreased by approximately $26.6 million. However, since changes in Retail Transmission Charges are reflected through the TCA after consideration of transmission recovery in retail base rates and the ACC approved balancing account, the retail revenue requirement decreased by $2.4 million, resulting in a reduction to the residential rate and increases to commercial rates. An adjustment to APS’s retail rates to recover FERC-approved transmission charges went into effect automatically on June 1, 2022.

Lost Fixed Cost Recovery Mechanism.The LFCR mechanism permits APS to recover on an after-the-fact basis a portion of its fixed costs that would otherwise have been collected by APS in the kWh sales lost due to APS energy efficiency programs and to DG such as rooftop solar arrays.  The fixed costs recoverable by the LFCR mechanism were first established in the 2012 Settlement Agreement and amount to approximately 3.1 cents per residential kWh lost and 2.3 cents per non-residential kWh lost.  These amounts were revised in the 2017 Settlement Agreement to 2.5 cents for both lost residential and non-residential kWh.kWh as set forth in the 2017 Settlement Agreement. The fixed costs recoverable by the LFCR mechanism are currently 2.56 cents for lost residential and 2.68 cents for lost non-residential kWh as set forth in the 2019 Rate Case decision. The LFCR adjustment has a year-over-year cap of 1% of retail revenues.  Any amounts left unrecovered in a particular year because of this cap can be carried over for recovery in a future year.  The kWhs lost from energy efficiency are based on a third-party evaluation of APS’s energy efficiency programs.  DG sales losses are determined from the metered output from the DG units.
 
On February 15, 2018, APS filed its 2018 annual LFCR adjustment, requesting that effective May 1, 2018, the LFCR be adjusted to $60.7 million. On February 6, 2019, the ACC approved the 2018 annual LFCR adjustment to become effective March 1, 2019. On February 15, 2019, APS filed its 2019 annual LFCR adjustment, requesting that effective May 1, 2019, the annual LFCR recovery amount be reduced to $36.2 million (a $24.5 million decrease from previous levels). On July 10, 2019, the ACC approved APS’s 2019 LFCR adjustment as filed, effective with the next billing cycle of July 2019. On February 14, 2020, APS filed its 2020 annual LFCR adjustment, requesting that effective May 1, 2020, the annual LFCR recovery amount be reduced to $26.6 million (a $9.6 million decrease from previous levels). On April 14, 2020, the ACC approved the 2020 LFCR adjustment as filed, effective with the first billing cycle in May 2020. On February 15, 2021, APS cannot predictfiled its 2021 annual LFCR adjustment, requesting that effective May 1, 2021, the outcome or timingannual LFCR recovery amount be increased to $38.5 million (an $11.8 million increase from previous levels). On April 13, 2021, the ACC voted not to approve the requested $11.8 million increase to the annual LFCR adjustment; thus, the previously approved rates continued to remain intact and the $11.8 million increase was reflected in APS’s 2022 filing in accordance with the compliance requirements.

As a result of the ACC’s consideration2019 Rate Case decision, APS’s annual LFCR adjustor rate will be dependent on an annual earnings test filing, which will compare APS’s previous year’s rate of this filing. Becausereturn with the related authorized rate of return. If the actual rate of return is higher than the authorized rate of return, the LFCR
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rate for the subsequent year is set at zero. APS determined that the changes to the LFCR mechanism, hasas a balancing accountresult of the 2019 Rate Case decision effective on December 1, 2021, did not materially impact its results of operations and financial statements for the year ended December 31, 2021. However, as a result of certain changes made to the LFCR mechanism in the 2019 Rate Case decision, the mechanism no longer qualified for alternative revenue program accounting treatment, which impacts the future timing of related revenue recognition.

On February 15, 2022, APS filed its 2022 annual LFCR adjustment, requesting that trues up any under or over recoveries,effective May 1, 2022, the delayannual LFCR recovery amount be increased to $59.1 million (a $32.5 million increase from previous levels, which was inclusive of the $11.8 million balance from the 2021 filing). On May 9, 2022, the ACC Staff filed its revised report and proposed order regarding APS’s 2022 LFCR adjustment, concluding that APS calculated the adjustment in implementationaccordance with its Plan of Administration. On May 18, 2022, the ACC approved the 2022 LFCR adjustment, with a rate effective date of June 1, 2022.

On February 15, 2023, APS filed a letter to the ACC docket stating that, in accordance with Decision No. 78585, APS and ACC Staff have agreed to move the filing date for the annual LFCR adjustment to July 31 each year. APS does not have an adverse effect on APS.
believe further ACC approval is needed to move the filing date, and APS intends to file its 2023 annual LFCR adjustment later in 2023 in accordance with the July 31 deadline.

Tax Expense Adjustor Mechanism.  MechanismAs part of the 2017 Settlement Agreement, the parties agreed to a rate adjustment mechanism to address potential federal income tax reform and enable the pass-through of certain income tax effects to customers. The TEAM expressly applies to APS'sAPS’s retail rates with the exception of a small subset of customers taking service under specially-approved tariffs. On December 22, 2017, the Tax Act was enacted.  This legislation made significant changes to the federal income tax laws including a reduction in the corporate tax rate from 35% to 21% effective January 1, 2018.

On January 8, 2018, APS filed an application with the ACC that addressed the change in the marginal federal tax rate from 35% to 21% resulting from the Tax Act and reduced rates by $119.1 million annually through an equal cents per kWh credit ("TEAM Phase I").  On February 22, 2018, the ACC approved the reduction of rates through an equal cents per kWh credit. The rate reduction was effective for the first billing cycle in March 2018.

The impact of the TEAM Phase I, over time, is expected to be earnings neutral. However, on a quarterly basis, there is a difference between the timing and amount of the income tax benefit and the reduction in revenues refunded through the TEAM Phase I related to the lower federal income tax rate. The amount of the benefit of the lower federal income tax rate is based on quarterly pre-tax results, while the reduction in

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revenues refunded through the TEAM Phase I is based on a per kWh sales credit which follows our seasonal kWh sales pattern and is not impacted by earnings of the Company.

On August 13, 2018, APS filed a second request with the ACC that addressed the return of an additional $86.5 million in tax savings to customers related to the amortization of non-depreciation related excess deferred taxes previously collected from customers ("(“TEAM Phase II"II”).  The ACC approved this request on March 13, 2019, effective the first billing cycle in April 2019 through the finallast billing cycle ofin March 2020.

On March 19, 2020, due to the COVID-19 pandemic, APS delayed the discontinuation of TEAM Phase II until the first billing cycle in May 2020.  Amounts credited to customers after the last billing cycle in March 2020 were recorded as a part of the balancing account and were addressed for recovery as part of the 2019 Rate Case. Both the timing of the reduction in revenues refunded through TEAM Phase II and the offsetting income tax benefit arewere recognized based upon our seasonal kWh sales pattern.

On April 10, 2019, APS filed a third request with the ACC that addressed the amortization of depreciation related excess deferred taxes over a 28.5 year28.5-year period consistent with IRS normalization rules(“ (“TEAM Phase III”).  On October 29, 2019, the ACC approved TEAM Phase III providing both (i) a one-time bill credit of $64 million which was credited to customers on their December 2019 bills, and (ii) a monthly bill credit effective the first billing cycle in December 2019 which will provideprovided an additional benefit of $39.5 million to customers through December 31, 2020. It is currently anticipated that benefits relatedOn November 20, 2020, APS filed an application to continue the amortizationTEAM Phase III monthly bill credit through the earlier of depreciation related excess deferred taxes for periods beginning after December 31, 2021, or at the conclusion of the 2019 Rate Case. On December 9, 2020, will be fullythe ACC approved this request. Both
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the timing of the reduction in revenues refunded through the TEAM Phase III monthly bill credit and the offsetting income tax benefit were recognized based upon APS’s seasonal kWh sales pattern.

As part of the 2019 Rate Case decision, the TEAM rates were reset to zero beginning December 31, 2021, and all impacts of the Tax Act were removed from the TEAM and incorporated into the 2019APS’s base rates. The TEAM was retained to address potential changes in tax law that may be enacted prior to a decision in a subsequent APS rate case filing.case.

Net Metering

In 2015, the ACC voted to conduct a generic evidentiary hearing on the value and cost of DG to gather information that will inform the ACC on net metering issues and cost of service studies in upcoming utility rate cases.  A hearing was held in April 2016. On October 7, 2016, the Administrative Law Judge issued a recommendation in the docket concerning the value and cost of DG solar installations. On December 20, 2016, the ACC completed its open meeting to consider the recommended opinion and order by the Administrative Law Judge. After making several amendments, the ACC approved the recommended decision by a 4-1 vote. As a result of the ACC’s action, effective with APS’s 2017 Rate Case Decision the net metering tariff that governs payments for energy exported to the grid from residential rooftop solar systems was replaced by a more formula-driven approach that utilizes inputs from historical wholesale solar power until an avoided cost methodology is developed by the ACC.

As amended, the decision provides that payments by utilities for energy exported to the grid from residential DG solar facilities will be determined using a RCP methodology as determined in the ACC’s generic Value and Cost of Distributed Generation docket. RCP is a method that is based on the most recent five-year rolling average price that APS paysincurs for utility-scale solar projects, while a forecasted avoided cost methodology is being developed.projects.  The price established by this RCP method will be updated annually (between general retail rate cases) but will not be decreased by more than 10% per year. Once theThe ACC is no longer pursuing development of a forecasted avoided cost methodology is developed,as an option for utilities in place of the ACC will determine in APS's subsequent rate cases which method (or a combination of methods) is appropriateRCP. Commercial customers, grandfathered residential solar customers, and residential customers with DG systems other than solar facilities continue to determine the actual price to be paid by APSqualify for exported distributed energy.net metering.


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In addition, the ACC made the following determinations:determinations in the Value and Cost of Distributed Generation docket:

CustomersRCP customers who have interconnected a DG system or submitted an application for interconnection for DG systems prior to September 1, 2017, based on APS's 2017 Rate Case Decision, will be grandfathered for a period of 20 years from the date the customer’s interconnection application was accepted by the utility;utility (for APS residential customers, as of September 1, 2017, based on APS’s 2017 Rate Case Decision);

Customerscustomers with DG solar systems are to be considered a separate class of customers for ratemaking purposes; and

Onceonce an initial export price is set for APS,utilities, no netting or banking of retail credits will be available for new DG customers, and the then-applicable export price will be guaranteed for new customers for a period of 10 years.

This decision of the ACC addresses policy determinations only. The decision states that its principles will be applied in future general retail rate cases, and the policy determinations themselves may be subject to future change, as are all ACC policies. A first-year export energy price of 12.9 cents per kWh was included in the 2017 Settlement Agreement and became effective on September 1, 2017.

In accordance with the 2017 Rate Case Decision, APS filed its request for a second-year export energy price of 11.6 cents per kWh on May 1, 2018.  This price reflected the 10% annual reduction discussed above. The new rate rider became effective on October 1, 2018. APS filed its request for a third-yearRCP export energy price of 10.5 cents per kWh on May 1, 2019.  This price also reflects the 10% annual reduction discussed above. The new rate rider became effective on October 1, 2019.

APS filed its request for a fourth-year export energy price of 9.4 cents per kWh on May 1, 2020, with a requested effective date of September 1, 2020.  This price reflects the 10% annual reduction discussed above. On JanuarySeptember 23, 2017, The Alliance for Solar Choice ("TASC") sought rehearing2020, the ACC approved the annual reduction of the ACC'sexport energy price but voted to delay the effectiveness of the reduction in export prices until October 1, 2021. In accordance with this decision, regarding the value and costRCP export energy price of DG. TASC asserted that9.4 cents per kWh became effective on October 1, 2021. On April 29, 2022, APS filed an application to decrease the RCP price to 8.46 cents per kWh, reflecting a 10% annual reduction, to become effective September 1, 2022. On July 12, 2022, the ACC improperly ignoredapproved the Administrative Procedure Act, failed to give adequate notice regarding the scopeRCP as filed.
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See "2016“2016 Retail Rate Case Filing with the Arizona Corporation Commission"Filing” above for information regarding an ACC order in connection with the rate review of the 2017 Rate Case Decision requiring APS to provide grandfathered net metering customers on legacy demand rates with an opportunity to switch to another legacy rate to enable such customers to benefit from legacy net metering rates.

Subpoena from Former Arizona Corporation Commissioner Robert Burns

On August 25, 2016, Commissionerthen-Commissioner Robert Burns, individually and not by action of the ACC as a whole, served subpoenas in APS’s then current retail rate proceeding on APS and Pinnacle West for the production of records and information relating to a range of expenditures from 2011 through 2016. The subpoenas requested information concerning marketing and advertising expenditures, charitable donations, lobbying expenses, contributions to 501(c)(3) and (c)(4) nonprofits and political contributions. The return date for the production of information was set as September 15, 2016. The subpoenas also sought testimony from Company personnel having knowledge of the material, including the Chief Executive Officer.


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OnAfter various proceedings between September 9, 2016 APSand March 2020, at which time Burns’ appeal of a prior dismissal by the trial court was pending before the Arizona Court of Appeals, Burns’ position as an ACC commissioner ended on January 4, 2021. Nevertheless, Burns filed a motion with the ACC aCourt of Appeals arguing that the appeal was not mooted by this fact and the court should decide the matter.On March 4, 2021, the Court of Appeals found Burns’ motion to quashbe moot because the subpoenas or, alternatively to stay APS's obligations to comply with the subpoenas and decline to decide APS's motion pending court proceedings. Contemporaneously with the filing of this motion, APS and Pinnacle West filed a complaint for special action and declaratory judgment in the Superior Court of Arizona for Maricopa County, seeking a declaratory judgmentAppeals had issued an opinion deciding the matter that Commissioner Burns’ subpoenas are contrary to law. On September 15, 2016, APS produced all non-confidential and responsive documents and offered to produce any remaining responsive documents that are confidential after an appropriate confidentiality agreement is signed.same day.

On February 7, 2017, Commissioner Burns opened a new ACC docket and indicated thatIn its purpose is to study and rectify problems with transparency and disclosure regarding financial contributions from regulated monopolies or other stakeholders who may appear beforeMarch 4, 2021, opinion, the ACC that may directly or indirectly benefit an ACC Commissioner, a candidate for ACC Commissioner, or key ACC Staff.  As part of this docket, Commissioner Burns set March 24, 2017 as a deadline for the production of all information previously requested through the subpoenas. Neither APS nor Pinnacle West produced the information requested and instead objected to the subpoena. On March 10, 2017, Commissioner Burns filed suit against APS and Pinnacle West in the Superior Court of Arizona for Maricopa County in an effortAppeals affirmed the trial court’s dismissal of Burns’ complaint, concluding that Burns could not overturn the ACC’s 4-1 vote refusing to enforce his subpoenas.On March 30, 2017, APSMay 15, 2021, Burns filed a motion to dismiss Commissioner Burns' suit against APS and Pinnacle West. In response topetition for review with the motion to dismiss, the court stayed the suit and ordered Commissioner Burns to file a motion to compel the productionArizona Supreme Court asking for reversal of the information sought byCourt of Appeals opinion and the subpoenas with the ACC. On June 20, 2017, the ACC denied the motion to compel.

On August 4, 2017, Commissioner Burns amended his complaint to add all of the ACC Commissionerstrial court’s judgment. APS and the ACC itself as defendants. All defendants moved to dismiss the amended complaint. On February 15, 2018, the Superior Court dismissed Commissioner Burns’ amended complaint. On March 6, 2018, Commissioner Burns filed an objection to the proposed final order from the Superior Court and a motion to further amend his complaint. The Superior Court permitted Commissioner Burns to amend his complaint to add a claim regarding his attempted investigation into whether his fellow commissioners should have been disqualified from voting on APS’s 2017 rate case. Commissioner Burns filed his second amended complaint, and all defendants filed responses opposingto Burns’ petition on July 14, 2021, requesting that the second amended complaintpetition be denied.The Arizona Supreme Court granted Burns’ petition and requested that it be dismissed. Oralheard oral argument occurred in November 2018 regarding the motion to dismiss. on March 8, 2022.On December 18, 2018, the trial court granted the defendants’ motions to dismiss and entered final judgment on January 18, 2019. On February 13, 2019, Commissioner Burns filed a notice of appeal. On July 12, 2019, Commissioner Burns filed his opening brief inSeptember 27, 2022, the Arizona Supreme Court issued a decision in favor of Burns reversing the Court of Appeals. APS filedAppeals’ decision. The Court held that the ACC acting by a majority of its answering brief on October 21, 2019. Thecommissioners may not prevent an individual commissioner from exercising investigatory powers pursuant to certain provisions of the Arizona CourtConstitution and that a commissioner aggrieved by such action may seek judicial recourse by way of Appeals granted the request for oral argument but no date has been set. APS and Pinnacle West cannot predict the outcome of this matter.

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Information Requests from Arizona Corporation Commissioners

On January 14, 2019, ACC Commissioner Kennedy opened a docket to investigate campaign expenditures and political participation of APS and Pinnacle West. In addition, on February 27, 2019, ACC Commissioners Burns and Dunn opened a new docket and requested documents from APS and Pinnacle West related to ACC elections and charitable contributions related to the ACC. On March 1, 2019, ACC Commissioner Kennedy issued a subpoena to APS seeking several categories of information for bothdeclaratory judgment. Pinnacle West and APS including political contributions, lobbying expenditures, marketing and advertising expenditures, and contributions made to 501(c)(3) and 501(c)(4) entities, fordo not believe there will be any immediate implications given the years 2013-2018. Pinnacle West and APS voluntarily responded to both sets of requests on March 29, 2019. APS also received and responded to various follow-on requests from ACC Commissioners on these matters. Pinnacle West and APSunderlying issues at hand are moot, but the Company cannot predict if or how this authority may be used by commissioners in the outcome of these matters. The Company's CEO, Mr. Guldner, appeared at the ACC's January 14, 2020 Open Meeting regarding ACC Commissioners' questions about political spending.  Mr. Guldner committed to the ACC that during his tenure, Pinnacle West and APS, and any of their affiliated companies, will not participate in ACC campaign elections through financial contributions or in-kind contributions.future.

2018 Renewable Energy Ballot Initiative

On February 20, 2018, a renewable energy advocacy organization filed with the Arizona Secretary of State a ballot initiative for an Arizona constitutional amendment requiring Arizona public service corporations to provide at least 50% of their annual retail sales of electricity from renewable sources by 2030. For purposes of the proposed amendment, eligible renewable sources would not include nuclear generating facilities. The initiative was placed on the November 2018 Arizona elections ballot. On November 6, 2018, the initiative failed to receive adequate voter support and was defeated.
Energy Modernization Plan

On January 30, 2018, former ACC Commissioner Tobin proposed the initial Energy Modernization Plan was proposed, which consisted of a series of energy policies tied to clean energy sources such assources. Draft energy storage, biomass, energy efficiency, electric vehicles,rules were subsequently issued and expanded energy planning througha series of revisions were made to the integrated resource plan ("IRP") process. In August 2018, the ACC directed ACC Staff to open a new rulemaking docket which will address a wide range of energy issues, including the Energy Modernization Plan proposals. The rulemaking will consider possible modifications to existing ACCdraft rules such as the RES, Electricin 2019 and Gas Energy Efficiency Standards, Net Metering, Resource Planning, and the Biennial Transmission Assessment, as well as the development of new rules regarding forest bioenergy, electric vehicles, interconnection of distributed generation, baseload security, blockchain technology and other technological developments, retail competition, and other energy-related topics.2020. On April 25, 2019,July 30, 2020, the ACC Staff issued a set offinal draft rules in regards to the Energy Modernization Plan and workshops were held on April 29, 2019 regarding these draft rules. On July 2, 2019, the ACC Staff issued a revised set of draftenergy rules which proposeproposed 100% of retail kWh sales from clean energy resources by the end of 2050. Nuclear power was defined as a RES goalclean energy resource. The proposed rules also required 50% of 45%
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retail energy served be renewable by 2035 and a goalthe end of 20% of retail sales during peak demand to be from clean energy resources by 2035. The draft rules also require a certain amount ofA new Energy Efficiency Standard (“EES”) was not included in the RES goal to be derived from distributed renewable storage, for which utilities would be required to offer performance-based incentives.  Nuclear energy would be considered a clean resource under the draftproposed rules.

The ACC held various stakeholder meetings and workshops on ACC Staff’sdiscussed the final draft energy rules at several different meetings in July through September 20192020 and have scheduled a workshop to be held on March 10 - 11, 2020.2021. On February 19,November 13, 2020, the ACC Staffapproved a final draft energy rules package. On April 19, 2021, the Administrative Law Judge issued a Recommended Order and Opinion on the final energy rules. In June 2021, the ACC adopted revised proposed setclean energy rules based on a series of ACC amendments. The adopted rules included a final standard of 100% clean energy by 2070 and the following interim standards for carbon reduction from baseline carbon emissions level: 50% reduction by December 31, 2032; 65% reduction by December 31, 2040; 80% reduction by December 31, 2050, and 95% reduction by December 31, 2060. Since the adopted clean energy rules differed substantially from the original Recommended Order and Opinion, supplemental rulemaking procedures were required before the rules could become effective. On January 26, 2022, the ACC reversed its prior decision and declined to send the final draft energy rules that will be discussed atthrough the workshop.rulemaking process. Instead, the ACC opened a new docket to consider All-Source RFP requirements and the IRP process. During the August 2022 Open Meeting, Commissioners voted to postpone a decision on the All-Source RFP and IRP rulemaking package until 2023. APS cannot predict the outcome of this matter.


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Integrated Resource Planning

ACC rules require utilities to develop fifteen-year15-year IRPs which describe how the utility plans to serve customer load in the plan timeframe. The ACC reviews each utility’s IRP to determine if it meets the necessary requirements and whether it should be acknowledged. In March of 2018, the ACC reviewed the 2017 IRPs of its jurisdictional utilities and voted to not acknowledge any of the plans.  APS does not believe that this lack of acknowledgment will have a material impact on our financial position, results of operations or cash flows.  Based on an ACC decision, APS was originally required to file its next IRP by April 1, 2020. On February 20, 2020, the ACC extended the deadline for all utilities to file their IRP’sIRPs from April 1, 2020, to June 26, 2020. On June 26, 2020, APS filed its final IRP. On July 15, 2020, the ACC extended the schedule for final ACC review of utility IRPs to February 2021. In February 2022, the ACC acknowledged APS’s IRP. The ACC also approved certain amendments to the IRP process, including, setting an EES of 1.3% of retail sales annually (averaged over a three-year period) and a demand-side resource capacity of 35% of 2020 peak demand by January 1, 2030. APS intends to file its next IRP later in 2023. See “Energy Modernization Plan” above for information regarding proposed changes to the IRP filings.

Public Utility Regulatory Policies Act

In August 2016, APS filed an application requesting that allUnder the Public Utility Regulatory Policies Act of its contracts with1978 (“PURPA”), qualifying facilities over 100 kW be set at a presumptive maximum 2-year term. A qualifying facility is an eligible energy-producing facility as defined by FERC regulations within a host electric utility’s service territory that has aare provided the right to sell energy and/or capacity to the host utility. Host utilities and are required to purchase powergranted relief from qualifying facilities at an avoided cost as determined by the utility subject to state commission oversight. A hearing was held in August 2019 and briefing on this matter was completed in October 2019 regarding APS’s application.certain regulatory burdens. On December 17, 2019, the ACC denied the application and mandated a minimum contract length of 18 years for qualifying facilities over 100 kW in Arizona and established that the rate paid to the qualifying facilities willmust be based on the long-term avoided cost. “Avoided cost” is generally defined as the price at which the utility could purchase or produce the same amount of power from sources other than the qualifying facility on a long-term basis. During calendar year 2020, APS entered into two 18-year PPAs with qualified facilities, each for 80 MW solar facilities. In March 2021, the ACC approved these agreements.

On July 16, 2020, FERC issued a final rule revising FERC’s regulations implementing PURPA. The final rule went into effect on December 31, 2020.
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Residential Electric Utility Customer Service Disconnections

On June 13, 2019, APS voluntarily suspended electric disconnections for residential customers who had not paid their bills.On June 20, 2019, the ACC voted to enact emergency rule amendments to prevent residential electric utility customer service disconnections during the period from June 1 through October 15. 15 (“Summer Disconnection Moratorium”).During the moratorium on disconnections,Summer Disconnection Moratorium, APS could not charge late fees and interest on amounts that were past due from customers.Customer deposits must also be used to pay delinquent amounts before disconnection can occur and customers will have four months to pay back their deposit and any remaining delinquent amounts.In accordance with the emergency rules, APS began putting delinquent customers on a mandatory four-month payment plan beginning on October 16, 2019. The emergency rule changes will be effective for 180 days and may be renewed for one additional 180 day period. During that time,

In June 2019, the ACC began a formal regular rulemaking process to allow stakeholder input and time for consideration of permanent rule changes. The ACC further ordered that each regulated electric utility serving retail customers in Arizona update its service conditions by incorporating the emergency rule amendments, restore power to any customers who were disconnected during the month of June 2019 and credit any fees that were charged for a reconnection. The ACC Staff issuedand ACC proposed draft amendments to the customer service disconnections rules. Stakeholders submitted initial commentsOn April 14, 2021, the ACC voted to send to the formal rulemaking process a draft amendmentsrules package governing customer disconnections that allows utilities to choose between a temperature threshold (above 95 degrees and below 32 degrees) or calendar method (June 1 – October 15) for disconnection moratoriums. On November 2, 2021, the ACC approved the final rules, and on SeptemberNovember 23, 2019.2021, the rules were submitted to the Arizona Office of the Attorney General for final review and approval. The new rules became effective on April 18, 2022, and APS has employed the calendar method for its disconnection moratorium.

In accordance with the ACC stakeholder meetingsservice disconnection rules, APS now uses the calendar based method to suspend the disconnection of customers for nonpayment from June 1 through October 15 each year (“Annual Disconnection Moratorium”). Customers with past due balances of $75 or greater as of the beginning of the Annual Disconnection Moratorium are automatically placed on six-month payment arrangements. In addition, APS voluntarily began waiving late payment fees of its customers (“Late Fee Waivers”) on March 13, 2020. Effective February 1, 2023 late payment fees for residential customers were heldreinstated. Late payment fees for commercial and industrial customers were reinstated effective May 1, 2022. Since the suspensions and moratoriums on disconnections began, APS has experienced an increase in September 2019, October 2019bad debt expense and January 2020 regarding the related write-offs of delinquent customer service disconnections rules. The disconnection moratorium resulted in a negative impact to our 2019 operating resultsaccounts.

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Retail Electric Competition Rules

On November 17, 2018, the ACC voted to re-examine the facilitation of a deregulated retail electric market in Arizona. An ACC special open meeting workshop was held on December 3, 2018. No substantive action was taken, but interested parties were asked to submit written comments and respond to a list of questions from ACC Staff. On July 1 and July 2, 2019, ACC Staff issued a report and initial proposed draft rules regarding possible modifications to the ACC’s retail electric competition rules. Interested parties filed comments to the ACC Staff report, and a stakeholder meeting and workshop to discuss the retail electric competition rules was held on July 30, 2019. ACC Commissioners submitted additional questions regarding this matter. On February 10, 2020, two ACC Commissioners filed two sets of draft proposed retail electric competition rules. On February 12, 2020, ACC staffStaff issued its second report regarding possible modifications to the ACC’s retail electric competition rules. During a July 15, 2020, ACC Staff meeting, the ACC Commissioners discussed the possible development of a retail competition pilot program, but no action was taken. The ACC has scheduled a workshop for February 25-26, 2020 for further consideration and discussion of thecontinues to discuss matters related to retail electric competition, rules.including the potential for additional buy-through programs or other pilot programs. In April 2022, the Arizona Legislature passed and the Governor signed a bill that repealed the electric deregulation law that had been in place in Arizona since 1998. APS cannot predict whether these efforts will result in any changes and, if changes to the rules results, what impact, these rules wouldif any, this change will have on APS.

On August 4, 2021, Green Mountain Energy filed an application seeking a certificate of convenience and necessity to allow it to provide competitive electric generation service in Arizona.Green Mountain Energy has requested that the ACC grant it the ability to provide competitive service in APS’s and Tucson Electric Power Company’s certificated service territories and proposes to deliver a 100% renewable energy product to residential and general service customers in those service territories. APS opposes Green Mountain Energy’s application and intends to intervene to contest it. On November 3, 2021, the ACC submitted questions to the Arizona Attorney General requesting legal opinions related to a number of issues surrounding retail electric competition and the ACC’s ability to issue competitive certificates of convenience and necessity. On November 26, 2021, the Administrative Law Judge issued a procedural order indicating it would not be appropriate to set a schedule until the Attorney General has provided his insights on the applicable law.

On October 28, 2021, an ACC Commissioner docketed a letter directing ACC Staff and interested stakeholders to design a 200 to 300 MW pilot program that would allow residential and small commercial customers of APS to elect a competitive electricity supplier. The letter also states that similar programs should be designed for other Arizona regulated electric utilities. APS cannot predict the outcome of these future activities.

Rate Plan Comparison Tool and Investigation

On November 14, 2019, APS learned that its rate plan comparison tool was not functioning as intended due to an integration error between the tool and the Company’sAPS’s meter data management system. APS immediately removed the tool from its website and notified the ACC. The purpose of the tool was to provide customers with a rate plan recommendation that would result in the lowest bills based upon historical usage data. Upon investigation, APS determined that the error may have affected rate plan recommendations to customers between February 4, 2019, and November 14, 2019. By the middle of May 2020, APS is providingprovided refunds to approximately 13,000 potentially impacted customers equal to the difference between what they paid for electricity and the amount they would have paid had they selected their most economical rate, as applicable, and a $25 payment for any inconvenience that the customer may have experienced. The refunds and payment for inconvenience being provided isdid not expected to have a material impact on APS'sAPS’s financial statements. In February 2020, APS launched a new online rate comparison tool. The ACC hired an outside consultant to evaluate the extent of the error and the overall effectiveness of the tool. On August 20, 2020, ACC Staff filed the outside consultant’s report on APS’s rate comparison tool. The
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report concluded APS’s new rate comparison tool is currently investigatingworking as intended. The report also identified a small population of additional customers that may have been affected by the error and APS has provided refunds and the $25 inconvenience payment to approximately 3,800 additional customers. These additional refunds and payment for inconvenience did not have a material impact on APS’s financial statements. On September 28, 2020, the ACC discussed this matter. report but did not take any action. APS cannot predict whether additional inquiries or actions may be taken by the ACC.

APS received a civil investigative demanddemands from the Office of the Arizona Attorney General, Civil Litigation Division, Consumer Protection & Advocacy Section that seeks(“Attorney General”) seeking information pertaining to the rate plan comparison tool offered to APS customers.customers and other related issues including implementation of rates from the 2017 Settlement Agreement and its Customer Education and Outreach Plan associated with the 2017 Settlement Agreement. APS is fully cooperatingcooperated with the Attorney General’s Office in this matter. On February 22, 2021, APS entered into a consent agreement with the Attorney General as a way to settle the matter. The settlement resulted in APS paying $24.75 million, approximately $24 million of which has been returned to customers as restitution. While this matter has been resolved with the Attorney General, APS cannot predict whether additional inquiries or actions may be taken by the outcome of these matters. ACC.

Four Corners
SCE-Related Matters. As part of APS’s acquisition of SCE’s interest in Units 4 and 5, APS and SCE agreed, via a "Transmission Termination Agreement" that, upon closing of the acquisition, the companies would terminate an existing transmission agreement ("Transmission Agreement") between the parties that provide transmission capacity on a system (the "Arizona Transmission System") for SCE to transmit its portion of the output from Four Corners to California.  APS previously submitted a request to FERC related to this termination, which resulted in a FERC order denying rate recovery of $40 million that APS agreed to pay SCE associated with the termination. On December 22, 2015, APS and SCE agreed to terminate the Transmission Termination Agreement and allow for the Transmission Agreement to expire according to its terms, which includes settling obligations in accordance with the terms of the Transmission Agreement. APS established a regulatory asset of $12 million in 2015 in connection with the payment required under the terms of the Transmission Agreement. On July 1, 2016, FERC issued an order denying APS’s request to recover the regulatory asset through its FERC-jurisdictional rates.  APS and SCE completed the termination of the Transmission Agreement on July 6, 2016. APS made the required payment to SCE and wrote off the $12 million regulatory asset and charged operating revenues to reflect the effects of this order in the second quarter

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of 2016.  On July 29, 2016, APS filed a request for rehearing with FERC. In its order denying recovery, FERC also referred to its enforcement division a question of whether the agreement between APS and SCE relating to the settlement of obligations under the Transmission Agreement was a jurisdictional contract that should have been filed with FERC. On October 5, 2017, FERC issued an order denying APS's request for rehearing. FERC also upheld its prior determination that the agreement relating to the settlement was a jurisdictional contract and should have been filed with FERC. APS filed an appeal of FERC's July 1, 2016 and October 5, 2017 orders with the United States Court of Appeals for the Ninth Circuit on December 4, 2017. On June 14, 2019, the United States Court of Appeals for the Ninth Circuit issued an unpublished memorandum order denying APS’s petition for review of FERC’s orders that denied APS’s request to recover the regulatory asset through its FERC-jurisdictional rates and granting APS’s petition for review of FERC’s orders finding the agreement to be a jurisdictional contract. The United States Court of Appeals for the Ninth Circuit vacated FERC’s determination that the agreement was required to be filed with FERC and remanded the issue to FERC for additional proceedings. On December 18, 2019, APS submitted an offer of settlement to FERC to resolve all outstanding issues related to this matter. The offer of settlement provided that APS would not recover in rates any portion of any payment it made to SCE in connection with the expiration of the Transmission Agreement and FERC would close certain dockets related to this matter. On February 5, 2020, FERC issued an order accepting APS’s offer of settlement and resolved this matter.

SCR Cost Recovery

.
On December 29, 2017, in accordance with the 2017 Rate Case Decision, APS filed a Notice of Intent to file its SCR Adjustment to permit recovery of costs associated with the installation of SCR equipment at Four Corners Units 4 and 5.  APS filed the SCR Adjustment request in April 2018.  Consistent with the 2017 Rate Case Decision, the request was narrow in scope and addressed only costs associated with this specific environmental compliance equipment.  The SCR Adjustment request provided that there would be a $67.5 million annual revenue impact that would be applied as a percentage of base rates for all applicable customers.  Also, as provided for in the 2017 Rate Case Decision, APS requested that the adjustment become effective no later than January 1, 2019.  The hearing for this matter occurred in September 2018.  At the hearing, APS accepted ACC Staff'sStaff’s recommendation of a lower annual revenue impact of approximately $58.5 million. The Administrative Law Judge issued a Recommended Opinion and Order finding that the costs for the SCR project were prudently incurred and recommending authorization of the $58.5 million annual revenue requirement related to the installation and operation of the SCRs. Exceptions to the Recommended Opinion and Order were filed by the parties and intervenors on December 7, 2018.  The ACC hasdid not issuedissue a decision on this matter.  APS included the costs for the SCR project in the retail rate base in its 2019 retail rate caseRate Case filing with the ACC.

On November 2, 2021, the 2019 Rate Case decision was approved by the ACC allowing approximately $194 million of SCR related plant investments and cost deferrals in rate base and to recover, depreciate and amortize in rates based on an end-of-life assumption of July 2031. The decision also included a partial and combined disallowance of $215.5 million on the SCR investments and deferrals. APS cannot predictbelieves the SCR plant investments and related SCR cost deferrals were prudently incurred, and on December 17, 2021, APS filed its Notice of Direct Appeal at the Arizona Court of Appeals requesting review of the $215.5 million disallowance. The Arizona Court of Appeals heard oral argument on November 30, 2022. The Court took the matter under advisement and will issue its decision in due course. Based on the partial recovery of these investments and cost deferrals in current rates and the uncertainty of the outcome or timing of the legal appeals process, APS has not recorded an impairment or write-off relating to the SCR plant investments or deferrals as of December 31, 2022. If the 2019 Rate Case decision on this matter.to disallow $215.5 million of the SCRs is ultimately upheld, APS maywill be required to record a charge to its results of operations, ifnet of tax, of approximately $154.4 million. We cannot predict the ACC issues an unfavorable decision (see SCR deferral inoutcome of the Regulatory Assets and Liabilities table below).legal
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challenges nor the timing of when this matter will be resolved. See above for further discussion on the 2019 Rate Case decision.

Cholla

On September 11, 2014, APS announced that it would close Unit 2 of the Cholla Power Plant (“Cholla”) and cease burning coal at the other APS-owned units (Units 1 and 3) at the plant by the mid-2020s, if EPAthe United States Environmental Protection Agency (“EPA”) approved a compromise proposal offered by APS to meet required environmental and emissions standards and rules. On April 14, 2015, the ACC approved APS'sAPS’s plan to retire Unit 2, without expressing any view on the future recoverability of APS'sAPS’s remaining investment in the unit. APS closed Unit 2 on October 1, 2015. In early 2017, EPA approved a final rule incorporating APS'sAPS’s compromise proposal, which took effect on April 26, 2017. In December 2019, PacifiCorp notified APS that it plansplanned to retire Cholla Unit 4 by the end of 2020 and the unit ceased operation in December 2020. APS has committed to end the use of coal at its remaining Cholla units by 2025.

Previously, APS estimated Cholla Unit 2’s end of life to be 2033. APS has been recovering a return on and of the net book value of the unit in base rates. Pursuant to the 2017 Settlement Agreement described above, APS will be allowed continued recovery of the net book value of the unit and the unit’s

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decommissioning and other retirement-related costs, ($73$37.2 million as of December 31, 2019),2022, in addition to a return on its investment. In accordance with GAAP, in the third quarter of 2014, Unit 2’s remaining net book value was reclassified from property, plant and equipment to a regulatory asset. The 2017 Settlement Agreement also shortenedIn accordance with the depreciation lives of Cholla Units 1 and 3 to 2025.2019 Rate Case decision, the regulatory asset is being amortized through 2033.
On March 20, 2019, APS announced that it began evaluating the feasibility and cost of converting a unit at Cholla to burn biomass. Biomass is a fuel comprised of forest trimmings, and a converted unit at Cholla could assist in forest thinning, responsible forest management, an improved watershed, and a reduced wildfire risk. APS’s ability to operate a biomass power plant would depend on third-parties procuring forest biomass for fuel. APS reported the results of its evaluation on May 9, 2019 to the ACC. On July 10, 2019, the ACC voted to not require APS to file a request for proposal to convert the unit at Cholla to burn biomass.
Navajo Plant

The co-owners of the Navajo Plant and the Navajo Nation agreed that the Navajo Plant would remainceased operations in operation until December 2019 under the existing plant lease.November 2019. The co-owners and the Navajo Nation executed a lease extension on November 29, 2017, that allows for decommissioning activities to begin after the plant ceased operations in November 2019.
APS is currently recovering depreciation and a return on the net book value of its interest in the Navajo Plant over its previously estimated life through 2026. APS will seek continued recovery in rates for the book value of its remaining investment in the plant ($82 million as of December 31, 2019) plus a return on the net book value as well as other costs related to retirement and closure, which are still being assessed and may be material. APS believes it will be allowed recovery of the net book value, in addition to a return on its investment.operations. In accordance with GAAP, in the second quarter of 2017, APS'sAPS’s remaining net book value of its interest in the Navajo Plant was reclassified from property, plant and equipment to a regulatory asset. If the ACC does not allow full recovery

APS has been recovering a return on and of the remaining net book value of thisits interest all or a portionin the Navajo plant in base rates over its previously estimated life through 2026. Pursuant to the 2019 Rate Case decision described above, APS will be allowed continued recovery of the book value of its remaining investment in the Navajo plant, $52.6 million as of December 31, 2022, in addition to a return on the net book value, with the exception of 15% of the annual amortization expense in rates. In addition, APS will be allowed recovery of other costs related to retirement and closure, including the Navajo coal reclamation regulatory asset, will be written off and APS's net income, cash flows, and$13.9 million as of December 31, 2022. The disallowed recovery of 15% of the annual amortization does not have a material impact on APS financial position will be negatively impacted.statements.


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COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Regulatory Assets and Liabilities

The detail of regulatory assets is as follows (dollars in thousands):
SDecember 31,
 Amortization Through20222021
Pension(a)$637,656 $509,751 
Deferred fuel and purchased power (b) (c)2023460,561 388,148 
Income taxes — AFUDC equity2052179,631 172,393 
Ocotillo deferral (e)2031138,143 147,650 
Retired power plant costs203398,692 114,841 
SCR deferral (e) (f)203197,624 105,771 
Deferred property taxes202741,057 49,626 
Deferred compensation203633,660 33,997 
Income taxes — investment tax credit basis adjustment205623,977 24,768 
Palo Verde VIEs (Note 17)204620,933 21,094 
Active union medical trust(g)18,226 1,175 
Four Corners cost deferral202415,999 24,075 
Navajo coal reclamation202613,862 16,840 
Lost fixed cost recovery (b)20239,547 63,889 
Loss on reacquired debt20389,468 11,020 
Mead-Phoenix transmission line — contributions in aid of construction20509,048 9,380 
Tax expense adjustor mechanism (b)20315,845 6,501 
OtherVarious8,171 10,592 
Total regulatory assets (d)$1,822,100 $1,711,511 
Less: current regulatory assets$538,879 $518,524 
Total noncurrent regulatory assets$1,283,221 $1,192,987 
(a)This asset represents the future recovery of pension benefit obligations and expense through retail rates.  If these costs are disallowed by the ACC, this regulatory asset would be charged to OCI and result in lower future revenues.  As a result of the 2019 Rate Case Decision, the amount authorized for inclusion in rate base was determined using an averaging methodology, which resulted in a reduced return in retail rates. See Note 7 for further discussion.
(b)See “Cost Recovery Mechanisms” discussion above.
(c)Subject to a carrying charge.
(d)There are no regulatory assets for which the ACC has allowed recovery of costs, but not allowed a return by exclusion from rate base. FERC rates are set using a formula rate as described in “Transmission Rates, Transmission Cost Adjustor and Other Transmission Matters.”
(e)Balance includes amounts for future regulatory consideration and amortization period determination.
(f)See “Four Corners SCR Cost Recovery” discussion above.
(g)Collected in retail rates.
142

S  December 31, 2019 December 31, 2018
 Amortization Through Current Non-Current Current Non-Current
Pension(a) $
 $660,223
 $
 $733,351
Retired power plant costs2033 28,182
 142,503
 28,182
 167,164
Income taxes - AFUDC equity2049 6,800
 154,974
 6,457
 151,467
Deferred fuel and purchased power (b) (c)2020 70,137
 
 37,164
 
Deferred fuel and purchased power — mark-to-market (Note 17)2024 36,887
 33,185
 31,728
 23,768
Deferred property taxes2027 8,569
 58,196
 8,569
 66,356
SCR deferralN/A 
 52,644
 
 23,276
Four Corners cost deferral2024 8,077
 32,152
 8,077
 40,228
Ocotillo deferralN/A 
 38,144
 
 
Deferred compensation2036 
 36,464
 
 36,523
Income taxes — investment tax credit basis adjustment2048 1,098
 24,981
 1,079
 25,522
Lost fixed cost recovery (b)2020 26,067
 
 32,435
 
Palo Verde VIEs (Note 19)2046 
 20,635
 
 20,015
Coal reclamation2026 1,546
 17,688
 1,546
 15,607
Loss on reacquired debt2038 1,637
 12,031
 1,637
 13,668
Mead-Phoenix transmission line - contributions in aid of construction2050 332
 9,712
 332
 10,044
TCA balancing account (b)2021 6,324
 2,885
 3,860
 772
Tax expense of Medicare subsidy2024 1,235
 4,940
 1,235
 6,176
AG-1 deferral2022 2,787
 2,716
 2,654
 5,819
Tax expense adjustor mechanism (b)2020 1,612
 
 
 
OtherVarious 1,917
 
 1,947
 3,185
Total regulatory assets (d)  $203,207
 $1,304,073
 $166,902
 $1,342,941
(a)This asset represents the future recovery of pension benefit obligations through retail rates.  If these costs are disallowed by the ACC, this regulatory asset would be charged to OCI and result in lower future revenues.  See Note 8 for further discussion.
(b)See “Cost Recovery Mechanisms” discussion above.
(c)Subject to a carrying charge.
(d)There are no regulatory assets for which the ACC has allowed recovery of costs, but not allowed a return by exclusion from rate base.  FERC rates are set using a formula rate as described in “Transmission Rates, Transmission Cost Adjustor and Other Transmission Matters.”


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


The detail of regulatory liabilities is as follows (dollars in thousands):
   December 31, 2019 December 31, 2018
 Amortization Through Current Non-Current Current Non-Current
Excess deferred income taxes - ACC - Tax Cuts and Jobs Act (a)2046 $59,918
 $1,054,053
 $
 $1,272,709
Excess deferred income taxes - FERC - Tax Cuts and Jobs Act (a)2058 6,302
 237,357
 6,302
 243,691
Asset retirement obligations2057 
 418,423
 
 278,585
Removal costs(c) 47,356
 136,072
 39,866
 177,533
Other postretirement benefits(d) 37,575
 139,634
 37,864
 125,903
Income taxes - change in rates2049 2,797
 68,265
 2,769
 70,069
Spent nuclear fuel2027 6,676
 51,019
 6,503
 57,002
Four Corners coal reclamation2038 1,059
 51,704
 1,858
 17,871
Income taxes - deferred investment tax credit2048 2,202
 50,034
 2,164
 51,120
Renewable energy standard (b)2021 39,287
 10,300
 44,966
 20
Demand side management (b)2021 15,024
 24,146
 14,604
 4,123
Sundance maintenance2031 5,698
 11,319
 1,278
 17,228
Property tax deferralN/A 
 7,046
 
 2,611
Tax expense adjustor mechanism (b)2020 7,018
 
 3,237
 
Deferred gains on utility property2022 2,423
 4,163
 4,423
 6,581
FERC transmission true up2021 1,045
 2,004
 
 
OtherVarious 532
 2,296
 42
 930
Total regulatory liabilities  $234,912
 $2,267,835
 $165,876
 $2,325,976

(a)For purposes of presentation on the Statement of Cash Flows, amortization of the regulatory liabilities for excess deferred income taxes are reflected as "Deferred income taxes" under Cash Flows From Operating Activities.
(b)See “Cost Recovery Mechanisms” discussion above.
(c)In accordance with regulatory accounting, APS accrues removal costs for its regulated assets, even if there is no legal obligation for removal.
(d)See Note 8.


 December 31,
 Amortization Through20222021
Excess deferred income taxes - ACC — Tax Cuts and Jobs Act (a)2046$971,545 $1,012,448 
Excess deferred income taxes - FERC — Tax Cuts and Jobs Act (a)2058221,877 229,116 
Asset retirement obligations2057354,002 614,683 
Other postretirement benefits(d)270,604 374,816 
Removal costs (c)106,889 119,580 
Deferred fuel and purchased power — mark-to-market (Note 15)202496,367 107,601 
Income taxes — change in rates205164,806 67,678 
Four Corners coal reclamation203852,592 55,392 
Income taxes — deferred investment tax credit205648,035 49,601 
Spent nuclear fuel202739,217 45,282 
Renewable energy standard (b)202435,720 38,640 
FERC transmission true up (b)202422,895 34,303 
Property tax deferral (e)202415,521 20,192 
Sundance maintenance203116,893 13,797 
Demand side management (b)20238,461 5,417 
Tax expense adjustor mechanism (b) (e)N/A4,835 4,835 
OtherVarious3,092 2,103 
Total regulatory liabilities$2,333,351 $2,795,484 
Less: current regulatory liabilities$271,575 $296,271 
Total noncurrent regulatory liabilities$2,061,776 $2,499,213 
5.(a)For purposes of presentation on the Statement of Cash Flows, amortization of the regulatory liabilities for excess deferred income taxes are reflected as “Deferred income taxes” under Cash Flows From Operating Activities.
(b)See “Cost Recovery Mechanisms” discussion above.
(c)In accordance with regulatory accounting, APS accrues removal costs for its regulated assets, even if there is no legal obligation for removal.
(d)See Note 7.
(e)Balance includes amounts for future regulatory consideration and amortization period determination.


4.    Income Taxes
 
Certain assets and liabilities are reported differently for income tax purposes than they are for financial statement purposes.  The tax effect of these differences is recorded as deferred taxes.  We calculate deferred taxes using currently enacted income tax rates.    

APS has recorded regulatory assets and regulatory liabilities related to income taxes on its Consolidated Balance Sheets in accordance with accounting guidance for regulated operations.  The regulatory assets are for certain temporary differences, primarily the allowance for equity funds used
143


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


during construction, investment tax credit (“ITC”) basis adjustment and tax expense of Medicare subsidy.  The regulatory liabilities primarily relate to the change in income tax rates and deferred taxes resulting from ITCs.

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


The Tax Act reduced the corporate tax rate to 21% effective January 1, 2018. As a result of this rate reduction, the Company recognized a $1.14 billion reduction in its net deferred income tax liabilities as of December 31, 2017. In accordance with accounting for regulated companies, the effect of this rate reduction was substantially offset by a net regulatory liability.

Federal income tax laws require the amortization of a majority of the balance over the remaining regulatory life of the related property. As a result of the modifications made to the annual transmission formula rate during the second quarter of 2018, the Company began amortization of FERC jurisdictional net excess deferred tax liabilities in 2018. On March 13, 2019, the ACC approved the Company's proposal to amortize non-depreciation related net excess deferred tax liabilities subject to its jurisdiction over a twelve-month period. As a result, the Company began amortization in March 2019. As of December 31, 2019, the Company has recorded $57 million of income tax benefit related to the amortization of these non-depreciation related net excess deferred tax liabilities. On October 29, 2019, the ACC approved the Company’s proposal to amortize depreciation related net excess deferred tax liabilities subject to its jurisdiction over a 28.5-year period with amortization to retroactively begin as of January 1, 2018. As a result, in the fourth quarter of 2019, the Company has recorded $62 million of income tax benefit related to amortization of these depreciation related liabilities. See Note 4 for more details.
In August 2018, U.S. Treasury proposed regulations that clarified bonus depreciation transition rules under the Tax Act for regulated public utility property placed in service after September 27, 2017 and before January 1, 2018.  However, these proposed regulations were ambiguous with respect to regulated public utility property placed in service on or after January 1, 2018. In September 2019, U.S. Treasury issued final regulations, which replaced the August 2018 proposed regulations. These final regulations did not materially impact any tax position taken by the Company for property placed in service after September 27, 2017 and before January 1, 2018.

Along with the September 2019 final regulations, U.S. Treasury also issued new proposed regulations which clarify bonus depreciation transition rules under the Tax Act for property placed in service by regulated public utilities after December 31, 2017. The proposed regulations provide that certain regulated public utility property which was under construction prior to September 28, 2017 and placed in service between January 1, 2018 and December 31, 2020 would continue to be eligible for bonus depreciation under the rules and bonus depreciation phase-downs in effect prior to enactment of the Tax Act.  During the third quarter of 2019, as a result of the clarification provided by these proposed regulations, the Company recorded additional deferred tax liabilities of approximately $56 million related to bonus depreciation benefits claimed on the Company’s 2018 tax return.

In accordance with regulatory requirements, APS ITCs are deferred and are amortized over the life of the related property with such amortization applied as a credit to reduce current income tax expense in the statementStatements of income.Income.

Net income associated with the Palo Verde sale leaseback VIEs is not subject to tax.  As a result, there is 0no income tax expense associated with the VIEs recorded on the Pinnacle West Consolidated and APS Consolidated Statements of Income. See Note 1917 for additional details related to the Palo Verde sale leaseback VIEs.


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


The following is a tabular reconciliation of the total amounts of unrecognized tax benefits, excluding interest and penalties, at the beginning and end of the year that are included in accrued taxes and unrecognized tax benefits (dollars in thousands):

 Pinnacle West Consolidated APS Consolidated
 2019 2018 2017 2019 2018 2017
Total unrecognized tax benefits, January 1$40,731
 $41,966
 $36,075
 $40,731
 $41,966
 $36,075
Additions for tax positions of the current year3,373
 3,436
 2,937
 3,373
 3,436
 2,937
Additions for tax positions of prior years1,843
 2,696
 4,783
 1,843
 2,696
 4,783
Reductions for tax positions of prior years for: 
  
  
  
  
  
Changes in judgment(2,078) (1,764) (1,829) (2,078) (1,764) (1,829)
Settlements with taxing authorities
 
 
 
 
 
Lapses of applicable statute of limitations(434) (5,603) 
 (434) (5,603) 
Total unrecognized tax benefits, December 31$43,435
 $40,731
 $41,966
 $43,435
 $40,731
 $41,966

Pinnacle West ConsolidatedAPS Consolidated
 202220212020202220212020
Total unrecognized tax benefits, January 1$45,086 $45,655 $43,435 $45,086 $45,655 $43,435 
Additions for tax positions of the current year1,399 3,305 3,418 1,399 3,305 3,418 
Additions for tax positions of prior years2,069 1,449 1,431 2,069 1,449 1,431 
Reductions for tax positions of prior years for:      
Changes in judgment(3,495)(2,659)(1,965)(3,495)(2,659)(1,965)
Settlements with taxing authorities— — — — — — 
Lapses of applicable statute of limitations(1,962)(2,664)(664)(1,962)(2,664)(664)
Total unrecognized tax benefits, December 31$43,097 $45,086 $45,655 $43,097 $45,086 $45,655 

Included in the balances of unrecognized tax benefits are the following tax positions that, if recognized, would decrease our effective tax rate (dollars in thousands):

 Pinnacle West Consolidated APS Consolidated
 2019 2018 2017 2019 2018 2017
Tax positions, that if recognized, would decrease our effective tax rate$22,813
 $19,504
 $16,373
 $22,813
 $19,504
 $16,373

Pinnacle West ConsolidatedAPS Consolidated
 202220212020202220212020
Tax positions, that if recognized, would decrease our effective tax rate$28,246 $26,300 $25,714 $28,246 $26,300 $25,714 

As of the balance sheet date, the tax year ended December 31, 20162019, and all subsequent tax years remain subject to examination by the IRS.  With a few exceptions, we are no longer subject to state income tax examinations by tax authorities for years before 2015.2018.

144


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


We reflect interest and penalties, if any, on unrecognized tax benefits in the Pinnacle West Consolidated and APS Consolidated Statements of Income as income tax expense.  The amount of interest expense or benefit recognized related to unrecognized tax benefits are as follows (dollars in thousands):

Pinnacle West ConsolidatedAPS Consolidated
 202220212020202220212020
Unrecognized tax benefit interest expense/(benefit) recognized$(139)$(535)$266 $(139)$(535)$266 
 Pinnacle West Consolidated APS Consolidated
 2019 2018 2017 2019 2018 2017
Unrecognized tax benefit interest expense/(benefit) recognized$459
 $(780) $577
 $459
 $(780) $577

Following are the total amount of accrued liabilities for interest recognized related to unrecognized benefits that could reverse and decrease our effective tax rate to the extent matters are settled favorably (dollars in thousands):
 Pinnacle West Consolidated APS Consolidated
 2019 2018 2017 2019 2018 2017
Unrecognized tax benefit interest accrued$1,589
 $1,130
 $1,910
 $1,589
 $1,130
 $1,910


Pinnacle West ConsolidatedAPS Consolidated
 202220212020202220212020
Unrecognized tax benefit interest accrued$1,181 $1,320 $1,855 $1,181 $1,320 $1,855 

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Additionally, as of December 31, 2019,2022, we have recognized less than $1 million of interest expense to be paid on the underpayment of income taxes for certain adjustments that we have filed, or will file, with the IRS.

The components of income tax expense are as follows (dollars in thousands):
Pinnacle West ConsolidatedAPS Consolidated
 Year Ended December 31,Year Ended December 31,
 202220212020202220212020
Current:   
Federal$35,617 $(5,041)$11,869 $103,349 $1,514 $57,299 
State1,950 2,458 1,932 161 (11)99 
Total current37,567 (2,583)13,801 103,510 1,503 57,398 
Deferred:      
Federal23,693 95,327 53,398 (31,860)101,175 15,122 
State13,567 17,342 10,974 19,150 22,875 16,244 
Total deferred37,260 112,669 64,372 (12,710)124,050 31,366 
Income tax expense/(benefit)$74,827 $110,086 $78,173 $90,800 $125,553 $88,764 
 Pinnacle West Consolidated APS Consolidated
 Year Ended December 31, Year Ended December 31,
 2019 2018 2017 2019 2018 2017
Current: 
  
  
      
Federal$(13,551) $18,375
 $11,624
 $(54,697) $88,180
 $21,512
State3,195
 3,342
 3,052
 695
 1,877
 2,778
Total current(10,356) 21,717
 14,676
 (54,002) 90,057
 24,290
Deferred: 
  
  
  
  
  
Federal(14,982) 94,721
 223,729
 29,321
 32,436
 221,078
State9,565
 17,464
 19,867
 15,109
 22,321
 23,800
Total deferred(5,417) 112,185
 243,596
 44,430
 54,757
 244,878
Income tax expense/(benefit)$(15,773) $133,902
 $258,272
 $(9,572) $144,814
 $269,168


145


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


The following chart compares pretax income at the 21% statutory federal income tax rate of 21% in 2019 and 2018 and 35% in 2017 to income tax expense (dollars in thousands):
Pinnacle West ConsolidatedAPS Consolidated
 Year Ended December 31,Year Ended December 31,
 202220212020202220212020
Federal income tax expense at statutory rate$120,887 $156,666 $136,127 $132,920 $162,762 $142,020 
Increases (reductions) in tax expense resulting from:      
State income tax net of federal income tax benefit17,740 22,656 19,146 19,000 23,339 20,124 
State income tax credits net of federal income tax benefit(5,482)(7,015)(8,951)(3,744)(5,277)(7,213)
Net operating loss carryback tax benefit— (5,915)— — — — 
Excess deferred income taxes — Tax Cuts and Jobs Act(36,241)(36,558)(50,543)(36,241)(36,558)(50,543)
Allowance for equity funds used during construction (see Note 1)(4,629)(4,180)(2,747)(4,629)(4,180)(2,747)
Palo Verde VIE noncontrolling interest (see Note 17)(3,617)(3,617)(4,094)(3,617)(3,617)(4,094)
Investment tax credit amortization(5,608)(7,620)(7,510)(5,608)(7,620)(7,510)
   Other federal income tax credits(10,867)(6,976)(4,616)(7,721)(3,912)(3,035)
Other2,644 2,645 1,361 440 616 1,762 
Income tax expense/(benefit)$74,827 $110,086 $78,173 $90,800 $125,553 $88,764 
 Pinnacle West Consolidated APS Consolidated
 Year Ended December 31, Year Ended December 31,
 2019 2018 2017 2019 2018 2017
Federal income tax expense at statutory rate$113,828
 $139,533
 $268,177
 $120,790
 $154,260
 $277,540
Increases (reductions) in tax expense resulting from: 
  
  
  
  
  
State income tax net of federal income tax benefit18,599
 23,115
 21,380
 19,267
 24,531
 22,329
State income tax credits net of federal income tax benefit(8,519) (6,704) (6,483) (6,781) (5,440) (5,053)
Nondeductible expenditures associated with ballot initiative
 7,879
 
 
 
 
Stock compensation(2,252) (1,804) (6,659) (1,054) (780) (3,489)
Excess deferred income taxes - Tax Cuts and Jobs Act(124,082) (6,725) 9,348
 (124,082) (4,715) 9,431
Allowance for equity funds used during construction (see Note 1)(2,476) (7,231) (12,937) (2,476) (7,231) (12,937)
Palo Verde VIE noncontrolling interest (see Note 19)(4,094) (4,094) (6,823) (4,094) (4,094) (6,823)
Investment tax credit amortization(6,851) (6,742) (6,715) (6,851) (6,742) (6,715)
Other74
 (3,325) (1,016) (4,291) (4,975) (5,115)
Income tax expense/(benefit)$(15,773) $133,902
 $258,272
 $(9,572) $144,814
 $269,168

146



COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS



The components of the net deferred income tax liability were as follows (dollars in thousands):
 Pinnacle West Consolidated APS Consolidated
 December 31, December 31,
 2019 2018 2019 2018
DEFERRED TAX ASSETS 
  
    
Risk management activities$17,552
 $15,785
 $17,552
 $15,785
Regulatory liabilities: 
  
  
  
Excess deferred income taxes - Tax Cuts and Jobs Act335,877
 376,869
 335,877
 376,869
Asset retirement obligation and removal costs143,011
 117,201
 143,011
 117,201
Unamortized investment tax credits52,236
 53,284
 52,236
 53,284
Other postretirement benefits43,841
 40,532
 43,841
 40,532
Other52,382
 40,380
 52,382
 40,380
Pension liabilities73,210
 112,019
 67,976
 107,009
Coal reclamation liabilities40,837
 47,508
 40,837
 47,508
Renewable energy incentives28,066
 30,779
 28,066
 30,779
Credit and loss carryforwards54,795
 1,755
 10,992
 
Other63,102
 58,820
 70,948
 59,919
Total deferred tax assets904,909
 894,932
 863,718
 889,266
DEFERRED TAX LIABILITIES 
  
  
  
Plant-related(2,448,458) (2,277,724) (2,448,458) (2,277,724)
Risk management activities(27) (237) (27) (237)
Other postretirement assets and other special use funds(66,399) (57,697) (65,965) (57,274)
Regulatory assets: 
  
    
Allowance for equity funds used during construction(40,023) (39,086) (40,023) (39,086)
Deferred fuel and purchased power(35,162) (23,086) (35,162) (23,086)
Pension benefits(163,339) (181,504) (163,339) (181,504)
Retired power plant costs (see Note 4)(42,228) (48,348) (42,228) (48,348)
Other(82,722) (72,096) (82,722) (72,096)
Other(18,890) (2,575) (18,890) (2,575)
Total deferred tax liabilities(2,897,248) (2,702,353) (2,896,814) (2,701,930)
Deferred income taxes — net$(1,992,339) $(1,807,421) $(2,033,096) $(1,812,664)

Pinnacle West ConsolidatedAPS Consolidated
 December 31,December 31,
 2022202120222021
DEFERRED TAX ASSETS  
Risk management activities$8,826 $677 $8,826 $677 
Regulatory liabilities:   
Excess deferred income taxes — Tax Cuts and Jobs Act295,014 306,915 295,014 306,915 
Asset retirement obligation and removal costs107,104 174,952 107,104 174,952 
Unamortized investment tax credits48,035 49,601 48,035 49,601 
Other postretirement benefits66,893 92,654 66,893 92,654 
Other62,915 65,815 62,915 65,815 
Operating lease liabilities184,030 204,890 182,663 204,378 
Pension liabilities33,674 42,136 30,436 37,814 
Coal reclamation liabilities44,312 43,165 44,312 43,165 
Renewable energy incentives19,948 22,646 19,948 22,646 
Credit and loss carryforwards37,647 57,077 13,654 18,902 
Other72,605 74,184 72,605 74,184 
Total deferred tax assets981,003 1,134,712 952,405 1,091,703 
DEFERRED TAX LIABILITIES   
Plant-related(2,518,164)(2,570,613)(2,518,164)(2,570,613)
Risk management activities(32,648)(27,276)(32,648)(27,276)
Pension and other postretirement assets(96,845)(133,624)(96,196)(132,769)
Other special use funds(57,572)(64,610)(57,572)(64,610)
Operating lease right-of-use assets(184,030)(204,890)(182,663)(204,378)
Regulatory assets:   
Allowance for equity funds used during construction(44,405)(42,616)(44,405)(42,616)
Deferred fuel and purchased power(114,232)(96,033)(114,232)(96,033)
Pension benefits(157,629)(126,010)(157,629)(126,010)
Retired power plant costs(24,397)(28,389)(24,397)(28,389)
Other(103,023)(123,902)(103,023)(123,902)
Other(32,479)(28,611)(7,123)(6,808)
Total deferred tax liabilities(3,365,424)(3,446,574)(3,338,052)(3,423,404)
Deferred income taxes — net$(2,384,421)$(2,311,862)$(2,385,647)$(2,331,701)
As of December 31, 2019, the2022, PNW consolidated deferred tax assets for credit and loss carryforwards relate to federal general business credits of approximately $62 million, which first begin to expire in 2036, state credit carryforwards net of federal benefit of $23$43 million, which first begin to expire in 2023, and other federal carryforwards of $9 million. The2024. PNW consolidated credit and loss carryforwards amount above has been reduced by $39$5 million of unrecognized tax benefits.


As of December 31, 2022, APS consolidated deferred tax assets for credit and loss carryforwards relate to state credit carryforwards net of federal benefit of $19 million, which first begin to expire in 2025. APS consolidated credit and loss carryforwards amount above has been reduced by $5 million of unrecognized tax benefits.
147

6.
COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS



5.      Lines of Credit and Short-Term Borrowings

Pinnacle West and APS maintain committed revolving credit facilities in order to enhance liquidity and provide credit support for their commercial paper programs, to refinance indebtedness, and for other general corporate purposes.purposes.


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


The table below presents the consolidated credit facilities and the amounts available and outstanding as of December 31, 2019 and 2018 (dollars in thousands):
December 31, 2022December 31, 2021
Pinnacle WestAPSTotalPinnacle WestAPSTotal
Commitments under Credit Facilities$200,000 $1,000,000 $1,200,000 $200,000 $1,000,000 $1,200,000 
Outstanding Commercial Paper, Term Loan and Revolving Credit Facility Borrowings(15,720)(325,000)(340,720)(13,300)(278,700)(292,000)
Amount of Credit Facilities Available$184,280 $675,000 $859,280 $186,700 $721,300 $908,000 
Commitment Fees0.175%0.125%0.175%0.125%
 December 31, 2019 December 31, 2018
 Pinnacle WestAPSTotal Pinnacle WestAPSTotal
Commitments under Credit Facilities$200,000
$1,000,000
$1,200,000
 $350,000
$1,000,000
$1,350,000
Outstanding Commercial Paper and Revolving Credit Facility Borrowings(76,675)
(76,675) (76,400)
(76,400)
Amount of Credit Facilities Available$123,325
$1,000,000
$1,123,325
 $273,600
$1,000,000
$1,273,600
        
Weighted-Average Commitment Fees0.125%0.100%  0.125%0.100% 


Pinnacle West

On May 9, 2019, Pinnacle West entered into a $50 million term loan agreement that matures May 7, 2020. Pinnacle West used the proceeds to refinance indebtedness under and terminate a prior $150 million revolving credit facility. Borrowings under the agreement bear interest at London Inter-bank Offered Rate ("LIBOR") plus 0.55% per annum. At December 31, 2019, Pinnacle West had $38 millionin outstanding borrowings under the agreement.

At December 31, 2019,2022, Pinnacle West had a $200 million revolving credit facility that matures in July 2023.on May 28, 2026. Pinnacle West has the option to increase the amount of the facility up to a maximum of $300 million upon the satisfaction of certain conditions and with the consent of the lenders.  Interest rates are based on Pinnacle West'sWest’s senior unsecured debt credit ratings.ratings and the agreement includes a sustainability-linked pricing metric which permits an interest rate reduction or increase by meeting or missing targets related to specific environmental and employee health and safety sustainability objectives. The facility is available to support Pinnacle West'sWest’s general corporate purposes, including support for Pinnacle West’s $200 million commercial paper program, for bank borrowings or for issuances of letters of credits.credit. At December 31, 2019,2022, Pinnacle West had 0no outstanding borrowings under its revolving credit facility, 0no letters of credit outstanding under the credit facility, and $77 $16 million of outstanding commercial paper borrowings.

APS

At December 31, 2019,2022, APS had 2two $500 million revolving credit facilities totalingthat total $1 billion including a $500 million credit facilityand that matures in June 2022 and a $500 million facility that matures in July 2023.mature on May 28, 2026.  APS may increase the amount of each facility up to a maximum of $700 million, for a total of $1.4 billion, upon the satisfaction of certain conditions and with the consent of the lenders.  Interest rates are based on APS’s senior unsecured debt credit ratings.ratings and the agreements include a sustainability-linked pricing metric which permits an interest rate reduction or increase by meeting or missing targets related to specific environmental and employee health and safety sustainability objectives. These facilities are available to support APS’s $500general corporate purposes, including support for APS’s $750 million commercial paper program, for bank borrowings or for issuances of letters of credit.  At December 31, 2019,2022, APS had 0 commercial paperhad no outstanding and 0 outstanding borrowings or letters of credit under its revolving credit facilities. facilities, no letters of credit outstanding under the credit facilities and $325 million of outstanding commercial paper borrowings.

See "Financial Assurances"“Financial Assurances” in Note 1110 for a discussion of APS's other outstanding letters of credit.
148


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS



Debt Provisions
 
On November 27, 2018,December 17, 2020, the ACC issued a financing order in which, subject to specified parameters and procedures, it approved APS’s short-term debt authorization equal to athe sum of (i) 7% of APS’s capitalization,capitalization, and (ii) $500 million (which is required to be used for costs relating to purchases of natural gas and power). On December 15, 2022, the ACC issued a financing order that, among other things, reaffirmed the short-term debt authorization from the 2020 financing order. See Note 76 for additional long-term debt provisions.
 

149


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS



7.6.    Long-Term Debt and Liquidity Matters

All of Pinnacle West’s and APS’s debt is unsecured.  The following table presents the components of long-term debt on the Consolidated Balance Sheets outstanding at December 31, 2019 and 2018 (dollars in thousands):
 MaturityInterestDecember 31,
 Dates (a)Rates20222021
APS    
Pollution control bonds:    
Variable2029(b)$163,975 $35,975 
Total pollution control bonds  163,975 35,975 
Senior unsecured notes2024-20502.20%-6.88%6,680,000 6,280,000 
Unamortized discount  (14,548)(14,995)
Unamortized premium  12,368 13,575 
Unamortized debt issuance cost(48,266)(47,862)
Total APS long-term debt  6,793,529 6,266,693 
Less current maturities — — 
Total APS long-term debt less current maturities  6,793,529 6,266,693 
BCE
Los Alamitos equity bridge loan(d)(d)27,575 — 
Los Alamitos construction facility(e)(e)23,110 — 
Unamortized debt issuance cost(135)— 
Total BCE long-term debt50,550 — 
Less current maturities50,685 — 
Total BCE long-term debt less current maturities(135)— 
Pinnacle West    
Senior unsecured notes20251.3%500,000 500,000 
Term loans2024(c)450,000 300,000 
Unamortized discount(25)(34)
Unamortized debt issuance cost(2,083)(2,924)
Total Pinnacle West long-term debt947,892 797,042 
Less current maturities— 150,000 
Total Pinnacle West long-term debt less current maturities947,892 647,042 
TOTAL LONG-TERM DEBT LESS CURRENT MATURITIES
$7,741,286 $6,913,735 
(a)    This schedule does not reflect the timing of redemptions that may occur prior to maturities.
(b)    The weighted-average interest rate for the variable rate pollution control bonds was 3.96% at December 31, 2022, and 0.22% at December 31, 2021. See additional details below.
(c)    The weighted-average interest rate was 5.1% at December 31, 2022, and 0.81% at December 31, 2021. See additional details below.
(d)    The weighted-average interest rate for the variable rate equity bridge loan is 5.18% at December 31, 2022 and will mature on the project’s commercial operation date, expected on or before August 15, 2023. See additional details below.
150

 Maturity Interest December 31,
 Dates (a) Rates 2019 2018
APS     
  
Pollution control bonds:     
  
Variable2029 (b) $35,975
 $35,975
Fixed2024 4.70% 115,150
 115,150
Total pollution control bonds    151,125
 151,125
Senior unsecured notes2020-2049 2.20%-6.88% 4,875,000
 4,575,000
Term loans
 (c) 200,000
 
Unamortized discount    (12,434) (12,638)
Unamortized premium    7,423
 7,736
Unamortized debt issuance cost    (37,981) (31,787)
Total APS long-term debt    5,183,133
 4,689,436
Less current maturities
   350,000
 500,000
Total APS long-term debt less current maturities    4,833,133
 4,189,436
Pinnacle West     
  
Senior unsecured notes2020 2.25% 300,000
 300,000
Term loan2020 (d) 150,000
 150,000
Unamortized discount    (57) (121)
Unamortized debt issuance cost    (518) (1,083)
Total Pinnacle West long-term debt    449,425
 448,796
Less current maturities    450,000
 
Total Pinnacle West long-term debt less current maturities    (575) 448,796
TOTAL LONG-TERM DEBT LESS CURRENT MATURITIES
    $4,832,558
 $4,638,232
(a)This schedule does not reflect the timing of redemptions that may occur prior to maturities.
(b)The weighted-average rate for the variable rate pollution control bonds was 1.54% at December 31, 2019 and 1.76% at December 31, 2018.
(c)The weighted-average interest rate was 2.12% at December 31, 2019.
(d)The weighted-average interest rate was 2.20% at December 31, 2019 and 3.02% at December 31, 2018.


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


(e)    The weighted-average interest rate for the variable rate construction facility is 5.71% at December 31, 2022 and will mature on the project’s commercial operation date, expected on or before August 15, 2023. See additional details below.

The following table shows principal payments due on Pinnacle West’s, APS’s and APS’sBCE’s total long-term debt (dollars in thousands):
Year 
Consolidated
Pinnacle West
 
Consolidated
APS
2020 $800,000
 $350,000
2021 
 
2022 
 
2023 
 
2024 365,150
 365,150
Thereafter 4,510,975
 4,510,975
Total $5,676,125
 $5,226,125

YearConsolidated
Pinnacle West
Consolidated
APS

BCE
2023$50,685 $— $50,685 
2024700,000 250,000 — 
2025800,000 300,000 — 
2026250,000 250,000 — 
2027300,000 300,000 — 
Thereafter5,743,975 5,743,975 — 
Total$7,844,660 $6,843,975 $50,685 
 
Debt Fair Value
 
Our long-term debt fair value estimates are classified within Level 2 of the fair value hierarchy. The following table represents the estimated fair value of our long-term debt, including current maturities (dollars in thousands):
 As of
December 31, 2019
 As of
December 31, 2018
 
Carrying
Amount
 Fair Value 
Carrying
Amount
 Fair Value
Pinnacle West$449,425
 $450,822
 $448,796
 $443,955
APS5,183,133
 5,743,570
 4,689,436
 4,789,608
Total$5,632,558
 $6,194,392
 $5,138,232
 $5,233,563

 As of
December 31, 2022
As of
December 31, 2021
 Carrying
Amount
Fair ValueCarrying
Amount
Fair Value
Pinnacle West$947,892 $905,525 $797,042 $792,735 
APS6,793,529 5,629,491 6,266,693 6,933,619 
BCE50,550 50,685 — — 
Total$7,791,971 $6,585,701 $7,063,735 $7,726,354 
 
Credit Facilities and Debt Issuances

Pinnacle West

On December 21, 2021, Pinnacle West entered into a $450 million term loan facility that matures December 20, 2024. On December 21, 2021, $150 million of the proceeds were received and recognized as long-term debt on the Consolidated Balance Sheets. On January 6, 2022, the remaining $300 million of proceeds was received and recognized on that date as long-term debt on the Consolidated Balance Sheets. The proceeds were used for general corporate purposes.

On December 23, 2020, Pinnacle West entered into a $150 million term loan facility that was set to mature June 30, 2022. The proceeds were received on January 4, 2021, and used for general corporate purposes. We recognized the term loan facility as long-term debt upon settlement on January 4, 2021. On January 6, 2022, Pinnacle West repaid this term loan facility early.

151


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


On December 16, 2022, Pinnacle West entered into a $175 million term loan facility that matures December 16, 2024. The proceeds were received on January 6, 2023 and used for general corporate purposes. We recognized the term loan facility as long-term debt upon settlement on January 6, 2023.
 
APS

On February 26, 2019,January 6, 2022, Pinnacle West contributed $150 million into APS entered into a $200 million term loan agreement that matures August 26, 2020.in the form of an equity infusion. APS used the proceedsthis contribution to repay existingshort-term indebtedness. Borrowings under the agreement bear interest at LIBOR plus 0.50% per annum.


On September 15, 2022, APS remarketed $128 million of the Maricopa County, Arizona Pollution Control Corporation Revenue Refunding Bonds, 2009 Series B, C, D and E, due May 1, 2029 (the “Bonds”). The Bonds were originally issued on June 26, 2009, and prior to this remarketing were held as treasury bonds. Each series of the Bonds has a principal amount of $32 million. All series of the Bonds have been remarketed and issued in weekly variable interest rate modes and are classified as long-term debt on our Consolidated Balance Sheets.

February 28, 2019,
On November 8, 2022, APS issued $300$400 million of 4.25%6.35% unsecured senior notes that mature on March 1, 2049. The net proceeds from the sale, together with funds made available from the term loan described above, were used to repay existing indebtedness.

On March 1, 2019, APS repaid at maturity $500 million aggregate principal amount of its 8.75% senior notes.

On August 19, 2019, APS issued $300 million of 2.6% unsecured senior notes that mature on AugustDecember 15, 2029. 2032. The net proceeds from the sale were used to repay short-term indebtedness consisting of commercial paper, borrowings, and to replenish cash used to fund capital expenditures.

On November 20, 2019, APS issued $300 million of 3.5% unsecured senior notes that mature on December 1, 2049. The net proceeds from the sale were used to repay short-term indebtedness, consisting of commercial paper borrowings, to replenish cash used to fund capital expenditures, and to redeem, on December 30, 2019, $100 million of the $250 million aggregate principal amount of our 2.2% Notes due January 15, 2020.for general corporate purposes.


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


On January 15, 2020, APS repaid at maturity the remaining6, 2023, Pinnacle West contributed $150 million into APS in the form of the $250 million aggregate principal amount of its 2.2% senior notes mentioned above.an equity infusion. APS used this contribution to repay short-term indebtedness.

See “Lines of Credit and Short-Term Borrowings” in Note 65 and “Financial Assurances” in Note 1110 for discussion of APS’s separate outstanding letters of credit.

BCE

On February 11, 2022, a special purpose subsidiary of BCE entered into a credit agreement to finance capital expenditures and related costs for a 31 MW solar and battery storage project in Los Alamitos, California (“Los Alamitos”) that is under development by the subsidiary. The credit agreement consists of an approximately $33 million equity bridge loan facility, an approximately $42 million non-recourse construction facility, and an approximately $5 million letter of credit facility. In connection with the credit agreement, Pinnacle West has issued a guarantee of up to $42 million primarily relating to the equity bridge loan. As of December 31, 2022, $28 million has been drawn from the equity bridge loan and there is a $23 million outstanding balance for the construction facility and $2.5 million letters of credit outstanding under the credit facility. The equity bridge loan and construction facility mature and are due on the project’s commercial operation date, expected on or before August 15, 2023.  BCE expects to convert the construction facility into a term loan upon the project’s commercial operation date.On October 19, 2022, BCE executed an interest rate swap to hedge the variable interest rate exposure of this credit facility. See Note 15.
 
Debt Provisions
 
Pinnacle West’s and APS’s debt covenants related to their respective bank financing arrangements include maximum debt to capitalization ratios. Pinnacle West and APS comply with this covenant.  For both Pinnacle West and APS, this covenant requires that the ratio of consolidated debt to total consolidated
152


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


capitalization not exceed 65%.  At December 31, 2019,2022, the ratio was approximately 52%57.7% for Pinnacle West and 47%50.8% for APS.  Failure to comply with such covenant levels would result in an event of default, which, generally speaking, would require the immediate repayment of the debt subject to the covenants and could cross-default other debt.  See further discussion of “cross-default” provisions below.
 
Neither Pinnacle West’s nor APS’s financing agreements contain “rating triggers” that would result in an acceleration of the required interest and principal payments in the event of a rating downgrade.  However, our bank credit agreements contain a pricing grid in which the interest rates we pay for borrowings thereunder are determined by our current credit ratings.
 
All of Pinnacle West’s loan agreements contain "cross-default"“cross-default” provisions that would result in defaults and the potential acceleration of payment under these loan agreements if Pinnacle West or APS were to default under certain other material agreements.  All of APS’s bank agreements contain "cross-default"“cross-default” provisions that would result in defaults and the potential acceleration of payment under these bank agreements if APS were to default under certain other material agreements.  Pinnacle West and APS do not have a material adverse change restriction for credit facility borrowings.

Although provisions in APS’s articles of incorporation and ACC financing orders establish maximum amounts of preferred stock and debt that APS may issue, APS does not expect any of these provisions to limit its ability to meet its capital requirements. On November 27, 2018,December 17, 2020, the ACC issued a financing order in which, subject to specified parameters and procedures, it approved an increase in APS’s long-term debt authorization of $7.5 billion. On December 15, 2022, the ACC issued a financing order approving APS’s application filed on April 6, 2022 requesting to increase the long-term debt limit from $5.1$7.5 billion to $5.9$8.0 billion in lightand to exclude financing lease PPAs from the definition of long-term indebtedness for purposes of the projected growth of APS and its customer base and the resulting projectedACC financing needs.orders. See Note 65 for additional short-term debt provisions.
 
8.7.    Retirement Plans and Other Postretirement Benefits

Pinnacle West sponsors a qualified defined benefit and account balance pension plan (The Pinnacle West Capital Corporation Retirement Plan) and a non-qualified supplemental excess benefit retirement plan for the employees of Pinnacle West and its subsidiaries.  All new employees participate in the account balance plan.  Defined benefit plans specify the amount of benefits a plan participant is to receive using information about the participant.  The pension plan covers nearly all employees.  The supplemental excess benefit retirement plan covers officers of the Company and highly compensated employees designated for participation by the Board of Directors.  Our employees do not contribute directly to the plans.  We calculate the benefits based on age, years of service and pay.

Pinnacle West also sponsors other postretirement benefit plans (Pinnacle West Capital Corporation Group Life and Medical Plan and Pinnacle West Capital Corporation Post-65 Retiree Health Reimbursement Arrangement)Arrangement “HRA”) for the employees of Pinnacle West and its subsidiaries.  These plans provide medical and life

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


insurance benefits to retired employees.  Employees must retire to become eligible for these retirement benefits, which are based on years of service and age.  For the medical insurance plan, retirees make contributions to cover a portion of the plan costs.  For the life insurance plan, retirees do not make contributions.  We retain the right to change or eliminate these benefits.

153


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Pinnacle West uses a December 31 measurement date each year for its pension and other postretirement benefit plans.  The market-related value of our plan assets is their fair value at the measurement date.  See Note 1412 for further discussion of how fair values are determined.  Due to subjective and complex judgments, which may be required in determining fair values, actual results could differ from the results estimated through the application of these methods.

Under the HRA, included in the other postretirement benefit plan, the Company provides a subsidy to retirees to defray the cost of a Medicare supplemental policy. Prior to 2020, we had been assuming a 4.75% escalation of these benefits; however, actual escalation has been significantly less than this assumption. Accordingly, during 2020 and for future periods, the escalation assumption was reduced to 2.00% (see weighted-average assumption table below). This escalation factor assumption change, among other factors, resulted in an increase in the over-funded status of the other postretirement benefit plan as of December 31, 2020. As a result, on January 4, 2021, we initiated the transfer of approximately $106 million of investment assets from the other postretirement benefit plan into the Active Union Employee Medical Account Trust. The Active Union Employee Medical Account is an existing trust account that holds investments restricted for paying active union employee medical costs. See Note 19. The transfer of other postretirement benefit plan investment assets into the Active Union Employee Medical Account permits access to approximately $106 million of assets for the sole purpose of paying active union employee medical benefits. This transfer of investment assets into the Active Union Employee Medical Account is consistent with the terms of a similar 2018 transaction.

A significant portion of the changes in the actuarial gains and losses of our pension and postretirement plans is attributable to APS and therefore isare recoverable in rates.  Accordingly, these changes are recorded as a regulatory asset or regulatory liability. Our retail rates provide for the inclusion of annual benefit expense, which allows for recovery or return of this regulatory asset/liability. See Note 3.
 
154


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


The following table provides details of the plans’ net periodic benefit costs and the portion of these costs charged to expense (including administrative costs and excluding amounts capitalized as overhead construction or billed to electric plant participants) (dollars in thousands):
 Pension��Other Benefits
 2019 2018 2017 2019 2018 2017
Service cost-benefits earned during the period$49,902
 $56,669
 $54,858
 $18,369
 $21,100
 $17,119
Interest cost on benefit obligation136,843
 124,689
 129,756
 29,894
 28,147
 29,959
Expected return on plan assets(171,884) (182,853) (174,271) (38,412) (42,082) (53,401)
Amortization of: 
  
  
  
  
  
Prior service cost (credit)
 
 81
 (37,821) (37,842) (37,842)
Net actuarial loss42,584
 32,082
 47,900
 
 
 5,118
Net periodic benefit cost (benefit)$57,445
 $30,587
 $58,324
 $(27,970) $(30,677) $(39,047)
Portion of cost charged to expense$30,312
 $10,120
 $27,295
 $(19,859) $(21,426) $(18,274)


 Pension PlansOther Benefits Plans
 202220212020202220212020
Service cost-benefits earned during the period$55,473 $61,236 $56,233 $16,470 $17,796 $22,236 
Non-service costs (credits):
Interest cost on benefit obligation107,492 98,566 118,567 17,491 16,513 25,857 
Expected return on plan assets(185,775)(202,628)(187,443)(46,042)(41,444)(40,077)
Amortization of:      
Prior service credit— — — (37,789)(37,705)(37,575)
Net actuarial (gain)/loss17,515 15,948 34,612 (12,835)(10,093)— 
Net periodic benefit cost/(benefit)$(5,295)$(26,878)$21,969 $(62,705)$(54,933)$(29,559)
Portion of cost/(benefit) charged to expense$(16,431)$(32,743)$3,386 $(45,042)$(38,657)$(20,966)
 

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


The following table shows the plans’ changes in the benefit obligations and funded status for the years 2019 and 2018 (dollars in thousands):
 Pension PlansOther Benefits Plans
 2022202120222021
Change in Benefit Obligation    
Benefit obligation at January 1$3,716,824 $3,902,867 $591,841 $624,034 
Service cost55,473 61,236 16,470 17,796 
Interest cost107,492 98,566 17,491 16,513 
Benefit payments(212,565)(207,928)(30,913)(31,280)
Actuarial (gain) loss(857,695)(137,917)(185,428)(35,222)
Benefit obligation at December 312,809,529 3,716,824 409,461 591,841 
Change in Plan Assets    
Fair value of plan assets at January 13,812,041 3,886,544 872,435 961,165 
Actual return on plan assets(787,874)18,169 (193,807)41,432 
Employer contributions— 100,000 — — 
Benefit payments(194,682)(192,672)(26,341)(24,310)
Transfer to active union medical account— — — (105,852)
Fair value of plan assets at December 312,829,485 3,812,041 652,287 872,435 
Funded Status at December 31$19,956 $95,217 $242,826 $280,594 
 Pension Other Benefits
 2019 2018 2019 2018
Change in Benefit Obligation 
  
  
  
Benefit obligation at January 1$3,190,626
 $3,394,186
 $676,771
 $753,393
Service cost49,902
 56,669
 18,369
 21,100
Interest cost136,843
 124,689
 29,894
 28,147
Benefit payments(177,882) (184,161) (32,486) (31,540)
Actuarial (gain) loss413,625
 (200,757) 54,376
 (94,329)
Benefit obligation at December 313,613,114
 3,190,626
 746,924
 676,771
Change in Plan Assets 
  
  
  
Fair value of plan assets at January 12,733,476
 3,057,027
 723,677
 1,022,371
Actual return on plan assets602,030
 (201,078) 144,095
 (40,354)
Employer contributions150,000
 50,000
 
 
Benefit payments(167,155) (172,473) (30,278) (72,453)
Transfer to active union medical account
 
 
 (185,887)
Fair value of plan assets at December 313,318,351
 2,733,476
 837,494
 723,677
Funded Status at December 31$(294,763) $(457,150) $90,570
 $46,906


The following table shows the projected benefit obligation and the accumulated benefit obligationinformation for pension plans with an accumulated obligation in excess of plan assets as of December 31, 2019 and 2018 (dollars in thousands):
As of December 31,
 20222021
Accumulated benefit obligation126,759 161,086 
Fair value of plan assets— — 
 2019 2018
Projected benefit obligation$177,775
 $3,190,626
Accumulated benefit obligation169,091
 3,038,774
Fair value of plan assets
 2,733,476
155


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


The Pinnacle West Capital Corporation Retirement Plan is more than 100% funded on an accumulated benefitsbenefit obligation basis at December 31, 2019,2022 and December 31, 2021, therefore the only pension plan with an accumulated benefitsbenefit obligation in excess of plan assets in 20192022 and 2021 is a non-qualified supplemental excess benefit retirement plan.

The following table shows information for pension plans with a projected benefit obligation in excess of plan assets (dollars in thousands):
As of December 31,
 20222021
Projected benefit obligation133,818 169,912 
Fair value of plan assets— — 

The Pinnacle West Capital Corporation Retirement Plan is more than 100% funded on a projected benefit obligation basis at December 31, 2022, and December 31, 2021, therefore the only pension plan with a projected benefit obligation in excess of plan assets in 2022 and 2021 is a non-qualified supplemental excess benefit retirement plan.

The following table shows the amounts recognized on the Consolidated Balance Sheets as of December 31, 2019 and 2018 (dollars in thousands):
 Pension Other Benefits
 2019 2018 2019 2018
Noncurrent asset$
 $
 $90,570
 $46,906
Current liability(14,578) (13,980) 
 
Noncurrent liability(280,185) (443,170) 
 
Net amount recognized$(294,763) $(457,150) $90,570
 $46,906

 Pension PlansOther Benefits Plans
 2022202120222021
Noncurrent asset$153,773 $265,129 $242,826 $280,594 
Current liability(17,531)(17,047)— — 
Noncurrent liability(116,286)(152,865)— — 
Net amount recognized (funded status)$19,956 $95,217 $242,826 $280,594 
 

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


The following table shows the details related to accumulated other comprehensive loss (gain) as of December 31, 20192022, and 20182021 (dollars in thousands): 
 Pension PlansOther Benefits Plans
 2022202120222021
Net actuarial loss (gain)$681,335 $582,895 $(195,095)$(262,352)
Prior service credit— — (76,843)(114,632)
APS’s portion recorded as a regulatory (asset) liability(637,656)(509,751)270,604 374,816 
Income tax expense (benefit)(10,797)(18,081)784 990 
Accumulated other comprehensive loss (gain)$32,882 $55,063 $(550)$(1,178)
 Pension Other Benefits
 2019 2018 2019 2018
Net actuarial loss$735,186
 $794,292
 $12,238
 $63,544
Prior service credit
 
 (189,912) (227,733)
APS’s portion recorded as a regulatory (asset) liability(660,223) (733,351) 177,209
 163,767
Income tax expense (benefit)(18,546) (15,083) 570
 561
Accumulated other comprehensive loss$56,417
 $45,858
 $105
 $139

156

The following table shows the estimated amounts that will be amortized from accumulated other comprehensive loss and regulatory assets and liabilities into net periodic benefit cost in 2020 (dollars in thousands):
 Pension 
Other
Benefits
Net actuarial loss$33,642
 $
Prior service credit
 (37,575)
Total amounts estimated to be amortized from accumulated other comprehensive loss (gain) and regulatory assets (liabilities) in 2020$33,642
 $(37,575)

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


The following table shows the weighted-average assumptions used for both the pension and other benefits to determine benefit obligations and net periodic benefit costs:
 Benefit Obligations
As of December 31,
Benefit Costs
For the Years Ended December 31,
 20222021202220212020
Discount rate – pension plans5.56 %2.92 %2.92 %2.53 %3.30 %
Discount rate – other benefits plans5.58 %2.98 %2.98 %2.63 %3.42 %
Rate of compensation increase4.57 %4.00 %4.00 %4.00 %4.00 %
Expected long-term return on plan assets - pension plansN/AN/A5.00 %5.30 %5.75 %
Expected long-term return on plan assets - other benefit plansN/AN/A5.35 %4.90 %4.85 %
Initial healthcare cost trend rate (pre-65 participants)6.50 %6.00 %6.00 %6.50 %7.00 %
Ultimate healthcare cost trend rate (pre-65 participants)4.75 %4.75 %4.75 %4.75 %4.75 %
Number of years to ultimate trend rate (pre-65 participants)64345
Initial and ultimate healthcare cost trend rate (post-65 participants) (a)2.00 %2.00 %2.00 %2.00 %4.75 %
Interest crediting rate – cash balance pension plans4.50 %4.50 %4.50 %4.50 %4.50 %
 
Benefit Obligations
As of December 31,
 
Benefit Costs
For the Years Ended December 31,
 2019 2018 2019 2018 2017
Discount rate – pension3.30% 4.34% 4.34% 3.65% 4.08%
Discount rate – other benefits3.42% 4.39% 4.39% 3.71% 4.17%
Rate of compensation increase4.00% 4.00% 4.00% 4.00% 4.00%
Expected long-term return on plan assets - pensionN/A
 N/A
 6.25% 6.05% 6.55%
Expected long-term return on plan assets - other benefitsN/A
 N/A
 5.40% 5.40% 6.05%
Initial healthcare cost trend rate (pre-65 participants)7.00% 7.00% 7.00% 7.00% 7.00%
Initial healthcare cost trend rate (post-65 participants)4.75% 4.75% 4.75% 4.75% 5.00%
Ultimate healthcare cost trend rate4.75% 4.75% 4.75% 4.75% 5.00%
Number of years to ultimate trend rate (pre-65 participants)6
 7
 7
 8
 4
(a)See discussion above relating to this assumptions impact on benefit obligations and the January 2021 asset transfer to the Active Union Employee Medical Account.

In selecting the pretax expected long-term rate of return on plan assets, we consider past performance and economic forecasts for the types of investments held by the plan.  For 2020,2023, we are assuming a 5.75%6.70% long-term rate of return for pension assets and 5.00%6.95% (before tax) for other benefit assets, which we believe is reasonable given our asset allocation in relation to historical and expected performance.


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


In selecting our healthcare trend rates, we consider past performance and forecasts of healthcare costs. A one percentage point change in the assumed initial and ultimate healthcare cost trend rates would have the following effects on our December 31, 2019 amounts (dollars in thousands): 
 1% Increase 1% Decrease
Effect on other postretirement benefits expense, after consideration of amounts capitalized or billed to electric plant participants$9,299
 $(3,827)
Effect on service and interest cost components of net periodic other postretirement benefit costs9,434
 (7,257)
Effect on the accumulated other postretirement benefit obligation124,073
 (97,710)

Plan Assets
 
The Board of Directors has delegated oversight of the pension and other postretirement benefit plans’ assets to an Investment Management Committee (“Committee”).  The Committee has adopted investment policy statements (“IPS”) for the pension and the other postretirement benefit plans’ assets. The investment strategies for these plans include external management of plan assets, and prohibition of investments in Pinnacle West securities.
 
The overall strategy of the pension plan’s IPS is to achieve an adequate level of trust assets relative to the benefit obligations.  To achieve this objective, the plan’s investment policy provides for mixes of investments including long-term fixed income assets and return-generatingreturn-seeking assets.  The target allocation between return-generatingreturn-seeking and long-term fixed income assets is defined in the IPS and is a function of the plan’s funded status.  The plan’s funded status is reviewed on at least a monthly basis.
 
Changes in the value of long-term fixed income assets, also known as liability-hedging assets, are intended to offset changes in the benefit obligations due to changes in interest rates.  Long-term fixed income assets consist primarily of fixed income debt securities issued by the U.S. Treasury and other
157


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


government agencies, U.S. Treasury Futures Contracts, and fixed income debt securities issued by corporations.  Long-term fixed income assets may also include interest rate swaps, and other instruments.
 
Return-generatingReturn-seeking assets are intended to provide a reasonable long-term rate of investment return with a prudent level of volatility.  Return-generatingReturn-seeking assets are composed of U.S. equities, international equities, and alternative investments.  International equities include investments in both developed and emerging markets.  Alternative investments may include investments in real estate, private equity and various other strategies.  The plan may also hold investments in return-generatingreturn-seeking assets by holding securities in partnerships, common and collective trusts, and mutual funds.

Based on the IPS, and given the pension plan'splan’s funded status at year-end 2019,2022, the target and actual allocation for the pension plan at December 31, 20192022, are as follows:
 Target AllocationActual Allocation
Long-term fixed income assets80 %78 %
Return-seeking assets20 %22 %
Total100 %100 %
 Pension
 Target Allocation Actual Allocation
Long-term fixed income assets62% 63%
Return-generating assets38% 37%
Total100% 100%

The permissible range is within +/- 3%-3% of the target allocation shown in the above table, and also considers the plan'splan’s funded status.


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


The following table presents the additional target allocations, as a percent of total pension plan assets, for the return-generatingreturn-seeking assets:
Asset ClassTarget Allocation
Equities in US and other developed markets1812 %
Equities in emerging markets6%
Alternative investments14%
Total3820 %


The pension plan IPS does not provide for a specific mix of long-term fixed income assets but does expect the average credit quality of such assets to be investment grade. 

As of December 31, 2019,2022, the asset allocation for other postretirement benefit plan assets is governed by the IPS for those plans, which provides for different asset allocation target mixes depending on the characteristics of the liability.  Some of these asset allocation target mixes vary with the plan’s funded status.  The following table presents the actual allocations of the investment for the other postretirement benefit plan at December 31, 2019:2022:
Other BenefitsActual Allocation
Actual Allocation
Long-term fixed income assets6862 %
Return-generatingReturn-seeking assets3238 %
Total100%

See Note 1412 for a discussion on the fair value hierarchy and how fair value methodologies are applied.  The plans invest directly in fixed income, U.S. Treasury Futures Contracts, and equity securities, in addition to investing indirectly in fixed income securities, equity securities and real estate through the use of mutual funds, partnerships and common and collective trusts.  Equity securities held directly by the
158


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


plans are valued using quoted active market prices from the published exchange on which the equity security trades and are classified as Level 1.  U.S. Treasury Futures Contracts are valued using the quoted active market prices from the exchange on which they trade and are classified as Level 1. Fixed income securities issued by the U.S. Treasury held directly by the plans are valued using quoted active market prices and are classified as Level 1.  Fixed income securities issued by corporations, municipalities, and other agencies are primarily valued using quoted inactive market prices, or quoted active market prices for similar securities, or by utilizing calculations which incorporate observable inputs such as yield, maturity, and credit quality.  These instruments are classified as Level 2.
 
Mutual funds, partnerships, and common and collective trusts are valued utilizing a Net Asset Value (NAV)(“NAV”) concept or its equivalent. Mutual funds, which includes exchange traded funds (ETFs)(“ETFs”), are classified as Level 1, and valued using a NAV that is observable and based on the active market in which the fund trades.

Common and collective trusts are maintained by banks or investment companies and hold certain investments in accordance with a stated set of objectives (such as tracking the performance of the S&P 500 Index).  The trust'strust’s shares are offered to a limited group of investors and are not traded in an active market. Investments in common and collective trusts are valued using NAV as a practical expedient and, accordingly, are not classified in the fair value hierarchy. The NAV for trusts investing in exchange traded equities, and fixed income securities is derived from the market prices of the underlying securities held by the trusts. The

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


NAV for trusts investing in real estate is derived from the appraised values of the trust'strust’s underlying real estate assets. As of December 31, 2019, the plans were able to transact in the common and collective trusts at NAV.

Investments in partnerships are also valued using the concept of NAV as a practical expedient and, accordingly, are not classified in the fair value hierarchy. The NAV for these investments is derived from the value of the partnerships'partnerships’ underlying assets. The plan'splan’s partnerships holdings relate to investments in high-yield fixed income instruments and assets of privately held portfolio companies.instruments. Certain partnerships also include funding commitments that may require the plan to contribute up to $50 million to these partnerships; as of December 31, 2019,2022, approximately $38 million of these commitments have been funded.
 
The plans’ trustee provides valuation of our plan assets by using pricing services that utilize methodologies described to determine fair market value.  We have internal control procedures to ensure this information is consistent with fair value accounting guidance.  These procedures include assessing valuations using an independent pricing source, verifying that pricing can be supported by actual recent market transactions, assessing hierarchy classifications, comparing investment returns with benchmarks, and obtaining and reviewing independent audit reports on the trustee’s internal operating controls and valuation processes.


159


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


The fair value of Pinnacle West’s pension plan and other postretirement benefit plan assets at December 31, 2019,2022, by asset category, are as follows (dollars in thousands):
 
 Level 1Level 2Other (a)Total
Pension Plan:   
Cash and cash equivalents$1,252 $— $— $1,252 
Fixed income securities:   
Corporate— 1,374,810 — 1,374,810 
U.S. Treasury635,245 — — 635,245 
Other (b)— 131,999 — 131,999 
Common stock equities (c)155,231 — — 155,231 
Mutual funds (d)101,557 — — 101,557 
Common and collective trusts:
Equities— — 181,912 181,912 
Real estate— — 174,228 174,228 
Partnerships— — 13,359 13,359 
Short-term investments and other (e)— — 59,892 59,892 
Total$893,285 $1,506,809 $429,391 $2,829,485 
Other Benefits:    
Cash and cash equivalents$204 $— $— $204 
Fixed income securities:   
Corporate— 166,879 — 166,879 
U.S. Treasury221,936 — — 221,936 
Other (b)— 7,321 — 7,321 
Common stock equities (c)127,493 — — 127,493 
Mutual funds (d)18,824 — — 18,824 
Common and collective trusts:   
Equities— — 73,956 73,956 
Real estate— — 23,541 23,541 
Short-term investments and other (e)3,274 — 8,859 12,133 
Total$371,731 $174,200 $106,356 $652,287 
 Level 1 Level 2 Other (a) Total
Pension Plan: 
  
    
Cash and cash equivalents$9,370
 $
 $
 $9,370
Fixed income securities: 
  
    
Corporate
 1,541,729
 
 1,541,729
U.S. Treasury406,112
 
 
 406,112
Other (b)
 92,240
 
 92,240
Common stock equities (c)250,829
 
 
 250,829
Mutual funds (d)185,928
 
 
 185,928
Common and collective trusts:       
   Equities
 
 392,403
 392,403
   Real estate
 
 171,645
 171,645
   Fixed Income
 
 98,065
 98,065
Partnerships
 
 103,796
 103,796
Short-term investments and other (e)
 
 66,234
 66,234
Total$852,239
 $1,633,969
 $832,143
 $3,318,351
Other Benefits: 
  
  
  
Cash and cash equivalents$2,184
 $
 $
 $2,184
Fixed income securities: 
  
    
Corporate
 202,640
 
 202,640
U.S. Treasury353,650
 
 
 353,650
Other (b)
 7,999
 
 7,999
Common stock equities (c)146,316
 
 
 146,316
Mutual funds (d)14,351
 
 
 14,351
Common and collective trusts: 
  
    
   Equities
 
 83,648
 83,648
   Real estate
 
 19,806
 19,806
Short-term investments and other (e)2,881
 
 4,019
 6,900
Total$519,382
 $210,639
 $107,473
 $837,494
(a)These investments primarily represent assets valued using NAV as a practical expedient, and have not been classified in the fair value hierarchy.
(b)This category consists primarily of debt securities issued by municipalities.
(c)This category primarily consists of U.S. common stock equities.
(d)These funds invest in international common stock equities.
(e)This category includes plan receivables and payables.

(a)These investments primarily represent assets valued using NAV as a practical expedient and have not been classified in the fair value hierarchy.
(b)This category consists primarily of debt securities issued by municipalities and asset backed securities.
(c)This category primarily consists of U.S. common stock equities.
(d)These funds invest in international common stock equities.
(e)This category includes plan receivables and payables.


 

160


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


The fair value of Pinnacle West’s pension plan and other postretirement benefit plan assets at December 31, 2018,2021, by asset category, are as follows (dollars in thousands):
 Level 1Level 2Other (a)Total
Pension Plan:   
Cash and cash equivalents$821 $— $— $821 
Fixed income securities:   
Corporate— 1,765,623 — 1,765,623 
U.S. Treasury1,008,211 — — 1,008,211 
Other (b)— 165,496 — 165,496 
Common stock equities (c)209,063 — — 209,063 
Mutual funds (d)132,656 — — 132,656 
Common and collective trusts:
   Equities— — 255,141 255,141 
   Real estate— — 173,197 173,197 
Partnerships— — 15,730 15,730 
Short-term investments and other (e)— — 86,103 86,103 
Total$1,350,751 $1,931,119 $530,171 $3,812,041 
Other Benefits:    
Cash and cash equivalents$121 $— $— $121 
Fixed income securities:   
Corporate— 244,572 — 244,572 
U.S. Treasury287,057 — — 287,057 
Other (b)— 9,330 — 9,330 
Common stock equities (c)176,024 — — 176,024 
Mutual funds (d)26,262 — — 26,262 
Common and collective trusts:
   Equities— — 96,547 96,547 
   Real estate— — 23,851 23,851 
Short-term investments and other (e)2,517 — 6,154 8,671 
Total$491,981 $253,902 $126,552 $872,435 
 Level 1 Level 2 Other (a) Total
Pension Plan: 
  
    
Cash and cash equivalents$451
 $
 $
 $451
Fixed income securities: 
  
    
Corporate
 1,237,744
 
 1,237,744
U.S. Treasury372,649
 
 
 372,649
Other (b)
 78,902
 
 78,902
Common stock equities (c)196,661
 
 
 196,661
Mutual funds (d)120,976
 
 
 120,976
Common and collective trusts:       
   Equities
 
 272,926
 272,926
   Real estate
 
 165,123
 165,123
   Fixed Income
 
 86,483
 86,483
Partnerships
 
 125,217
 125,217
Short-term investments and other (e)
 
 76,344
 76,344
Total$690,737
 $1,316,646
 $726,093
 $2,733,476
Other Benefits: 
  
  
  
Cash and cash equivalents$93
 $
 $
 $93
Fixed income securities: 
  
    
Corporate
 163,286
 
 163,286
U.S. Treasury318,017
 
 
 318,017
Other (b)
 7,531
 
 7,531
Common stock equities (c)129,199
 
 
 129,199
Mutual funds (d)10,963
 
 
 10,963
Common and collective trusts:       
   Equities
 
 65,720
 65,720
   Real estate
 
 19,054
 19,054
Short-term investments and other (e)3,633
 
 6,181
 9,814
Total$461,905
 $170,817
 $90,955
 $723,677
(a)These investments primarily represent assets valued using NAV as a practical expedient and have not been classified in the fair value hierarchy.
(b)This category consists primarily of debt securities issued by municipalities.
(c)This category primarily consists of U.S. common stock equities.
(d)These funds invest in U.S. and international common stock equities.
(e)This category includes plan receivables and payables.

(a)These investments primarily represent assets valued using NAV as a practical expedient, and have not been classified in the fair value hierarchy.
(b)This category consists primarily of debt securities issued by municipalities.
(c)This category primarily consists of U.S. common stock equities.
(d)These funds invest in U.S. and international common stock equities.
(e)This category includes plan receivables and payables.

Contributions
 
Future year contribution amounts are dependent on plan asset performance and plan actuarial assumptions.  We made contributions to our pension plan totaling $150$0 million in 2019, $502022, $100 million in 2018,2021, and $100 million in 2017.2020.  The minimum required contributions for the pension plan are 0zero for the next three years.  Weyears and we do not expect to make any voluntary contributions up to $100 million per year during the 2020-2022 period.in 2023, 2024 or 2025.  With regard to contributions to our other postretirement benefit plan, we did not make a contribution in 20192022 or 2021 and 2018. We made a contribution of approximately $1 million in 2017.  We do not expect to make any contributions over the next three years to our other postretirement benefit plans.in 2023, 2024 or 2025. The Company was reimbursed

161


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS



reimbursed $30$26 million in 2019 and $722022, $24 million in 20182021, and $26 million in 2020 for prior years retiree medical claims from the other postretirement benefit plan trust assets. The Company was not reimbursed in 2017.
 
Estimated Future Benefit Payments
 
Benefit payments, which reflect estimated future employee service, for the next five years and the succeeding five years thereafter, are estimated to be as follows (dollars in thousands):
Year Pension Other Benefits
2020 $199,395
 $31,531
2021 201,597
 32,777
2022 206,618
 33,566
2023 213,208
 34,415
2024 218,150
 34,468
Years 2025-2029 1,111,171
 174,607

YearPension PlansOther Benefits Plans
2023$240,034 $31,235 
2024227,234 30,865 
2025223,813 30,251 
2026224,881 30,135 
2027221,976 29,790 
Years 2028-20321,117,192 146,725 
 
Electric plant participants contribute to the above amounts in accordance with their respective participation agreements.

Employee Savings Plan Benefits
 
Pinnacle West sponsors a defined contribution savings plan for eligible employees of Pinnacle West and its subsidiaries.  In 2019,2022, costs related to APS’s employees represented 99% of the total cost of this plan.  In a defined contribution savings plan, the benefits a participant receives result from regular contributions participants make to their own individual account, the Company’s matching contributions and earnings or losses on their investments.  Under this plan, the Company matches a percentage of the participants’ contributions in cash which is then invested in the same investment mix as participants elect to invest their own future contributions.  Pinnacle West recorded expenses for this plan of approximately $12 million for 2022, $12 million for 2021, and $11 million for 2019, $11 million for 2018, and $10 million for 2017.

2020.
9.
8.    Leases
 
We lease certain land, buildings, vehicles, equipment, and other property through operating rental agreements with varying terms, provisions, and expiration dates. APS also has certain purchased power agreements that qualify as lease arrangements. Our leases have remaining terms that expire in 20202023 through 2050.2052. Substantially all of our leasing activities relate to APS.

In 1986, APS entered into agreements with 3three separate lessor trust entities in order to sell and lease back interests in Palo Verde Unit 2 and related common facilities.  These lessor trust entities have been deemed VIEs for which APS is the primary beneficiary.  As the primary beneficiary, APS consolidated these lessor trust entities.  The impacts of these sale leaseback transactions are excluded from our lease disclosures as lease accounting is eliminated upon consolidation.  See Note 1917 for a discussion of VIEs.
On January 1, 2019 we adopted new
APS has purchased power lease accounting guidance (see Note 3). We elected the transition method that allows us to apply the new lease guidance on the date of adoption, January 1, 2019, and will not retrospectively adjust prior periods. We also elected certain transition practical expedientsagreements that allow us to not reassess (a) whether any expired or existing contracts are or contain leases, (b)APS the lease classification for any expired or existing leases and (c) initial direct costs for any existing leases. These practical expedients apply to leases that commenced prior to January 1, 2019. Furthermore, we elected the practical expedient transition provisions relatingright to the treatmentgeneration capacity from certain natural-gas fueled generators during certain months of existing land easements.each year throughout the term of the arrangements. As APS only has rights to use the assets during certain periods of each year, the leases have

162


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS




On January 1, 2019non-consecutive periods of use. APS does not operate or maintain these leased assets. APS controls the adoptiondispatch of this new accounting standard resulted in the recognition on our Consolidated Balance Sheets of approximately $194 million of right-of-use leasethese leased assets and $119 millionis required to pay fixed monthly capacity payments during the periods of use. For these types of leased assets, APS has elected to combine both the lease liabilities relating to ourand non-lease payment components and accounts for the entire fixed payment as a lease obligation. These purchased power lease contracts are accounted for as operating lease arrangements.leases. The right-of-use lease assets include $85 million of prepaid lease costs that have been reclassified from other deferred debits, and $10 million of deferred lease costs that have been reclassified from other current liabilities.contracts do not contain purchase options or term extension options. In addition to these balance sheet impacts, the adoptionfixed monthly capacity payment, APS must also pay variable charges based on the actual production volume of the guidance resultedasset. The variable consideration is not included in expandedthe measurement of our lease disclosures, which are included below.obligation.

The following table provides information related to our lease costs (dollars in thousands):

For the Year Ended
December 31,
202220212020
Operating Lease Cost - Purchased Power Lease Contracts$104,001 $105,762 68,883 
Operating Lease Cost - Land, Property, and Other Equipment18,061 18,498 18,493 
Total Operating Lease Cost122,062 124,260 87,376 
Variable lease cost (a)122,040 118,969 122,331 
Short-term lease cost9,928 3,872 3,804 
Total lease cost$254,030 $247,101 $213,511 
(a)     Primarily relates to purchased power lease contracts.
  Year Ended
December 31, 2019
  Purchased Power Lease Contracts Land, Property & Equipment Leases Total
Operating lease cost $42,190
 $18,038
 $60,228
Variable lease cost 113,233
 782
 114,015
Short-term lease cost 
 4,385
 4,385
Total lease cost $155,423
 $23,205
 $178,628


Lease costs are primarily included as a component of operating expenses on our Consolidated Statements of Income. Lease costs relating to purchased power lease contracts are recorded in fuel and purchased power on the Consolidated Statements of Income and are subject to recovery under the PSA or RES (seeRES. See Note 4).3. The tables above reflect the lease cost amounts before the effect of regulatory deferral under the PSA and RES. Variable lease costs are recognized in the period the costs are incurred, and primarily relate to renewable purchased power lease contracts. Payments under most renewable purchased power lease contracts are dependent upon environmental factors, and due to the inherent uncertainty associated with the reliability of the fuelgeneration source, the payments are considered variable and are excluded from the measurement of lease liabilities and right-of-use lease assets. Certain of our lease agreements have lease terms with non-consecutive periods of use. For these agreements we recognize lease costs during the periods of use. Leases with initial terms of 12 months or less are considered short-term leases and are not recorded on the balance sheet.

Lease disclosures relating to 2018 and 2017 are presented under prior lease accounting guidance. Lease expense recognized in the Consolidated Statements
163



The following table provides information related to the maturity of our operating lease liabilities (dollars in thousands):
 December 31, 2019December 31, 2022
Year Purchased Power Lease Contracts (a) Land, Property & Equipment Leases TotalYearPurchased Power Lease ContractsLand, Property & Equipment LeasesTotal
2020 $
 $14,698
 $14,698
2021 
 11,963
 11,963
2022 
 8,331
 8,331
2023 
 6,326
 6,326
2023$106,151 $14,254 $120,405 
2024 
 4,141
 4,141
2024104,315 11,330 115,645 
20252025106,582 8,655 115,237 
20262026120,016 7,207 127,223 
2027202789,108 5,292 94,400 
Thereafter 
 38,697
 38,697
Thereafter210,486 37,873 248,359 
Total lease commitments 
 84,156
 84,156
Total lease commitments736,658 84,611 821,269 
Less imputed interest 
 19,571
 19,571
Less imputed interest57,682 19,130 76,812 
Total lease liabilities $
 $64,585
 $64,585
Total lease liabilities$678,976 $65,481 $744,457 
    
(a) As of December 31, 2019, we had no operating lease liabilities relating to purchased power lease contracts. See discussion below regarding executed contracts with commencement dates beginning in June 2020.

We recognize lease assets and liabilities upon lease commencement. At December 31, 2019,2022, we have additionalvarious lease arrangements that have been executed but have not yet commenced. These arrangements primarily relate to purchased powerenergy storage assets. The lease contracts. These leases have commencement dates beginning infor these arrangements have experienced delays. APS continues to work with the lessors to determine revised commencement dates. We expected lease commencement dates ranging from June 20202023 through June 2025, with lease terms endingexpiring through October 2027.May 2045. We expect the total fixed consideration paid for these arrangements, which includes both lease and nonleasenon-lease payments, will approximate $705 million$2.7 billion over the term20-year terms of the arrangements.agreements.


The following table provides information related to estimated future minimumIn January 2023, APS modified two existing purchase power operating lease agreements. Among other changes, the modifications extend the expiration dates of these contracts from October 2027 to October 2032 for one of the leases, and from September 2026 to October 2034 for the other lease. These lease agreements previously commenced in 2020 and 2021. In January 2023, as a result of these modifications, APS recorded an additional $537 million of operating lease liabilities and right-of-use operating lease assets. These obligations relate to payments (dollars in thousands):that will occur during the periods 2023 through 2034.
  December 31, 2018
Year Purchased Power Lease Contracts Land, Property & Equipment Leases Total
2019 $54,499
 $13,747
 $68,246
2020 
 12,428
 12,428
2021 
 9,478
 9,478
2022 
 6,513
 6,513
2023 
 5,359
 5,359
Thereafter 
 42,236
 42,236
Total future lease commitments $54,499
 $89,761
 $144,260
164




COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS



The following tables provide other additional information related to operating lease liabilities:liabilities (dollars in thousands):
Year Ended December 31, 2022Year Ended December 31, 2021Year Ended December 31, 2020
Cash paid for amounts included in the measurement of lease liabilities — operating cash flows:$118,463 $116,661 $75,097 
Right-of-use operating lease assets obtained in exchange for operating lease liabilities16,990 500,582 441,653 

December 31, 2019
Weighted average remaining lease term13 years
Weighted average discount rate (a)3.71%

December 31, 2022December 31, 2021
Weighted average remaining lease term7 years8 years
Weighted average discount rate (a)2.21 %2.13 %

(a)Most of our lease agreements do not contain an implicit rate that is readily determinable. For these agreements we use our incremental borrowing rate to measure the present value of lease liabilities. We determine our incremental borrowing rate at lease commencement based on the rate of interest that we would have to pay to borrow, on a collateralized basis over a similar term, an amount equal to the lease payments in a similar economic environment. We use the implicit rate when it is readily determinable.
165


 Year Ended December 31, 2019
Cash paid for amounts included in the measurement of lease liabilities - operating cash flows (dollars in thousands):$69,075





COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS



10.9.    Jointly-Owned Facilities
 
APS shares ownership of some of its generating and transmission facilities with other companies.  We are responsible for our share of operating costs which are included in the corresponding operating expenses on our Consolidated Statements of Income. We are also responsible for providing our own financing.  Our share of operating expenses and utility plant costs related to these facilities is accounted for using proportional consolidation.  The following table shows APS’s interests in those jointly-owned facilities recorded on the Consolidated Balance Sheets at December 31, 20192022 (dollars in thousands):

 Percent
Owned
 Plant in
Service
Accumulated
Depreciation
Construction
Work in
Progress
Generating facilities:     
Palo Verde Units 1 and 329.1 %$1,947,593 $1,099,132 $39,933 
Palo Verde Unit 2 (a)16.8 %659,514 383,775 14,784 
Palo Verde Common28.0 %(b)799,794 346,705 52,631 
Palo Verde Sale Leaseback (a)351,050 260,754 — 
Four Corners Generating Station63.0 %1,665,042 620,918 46,643 
Cholla Common Facilities (c)50.5 %207,104 140,886 2,988 
Transmission facilities:     
ANPP 500kV System33.4 %(b)133,887 55,704 2,820 
Navajo Southern System26.8 %(b)90,345 36,929 1,945 
Palo Verde — Yuma 500kV System25.4 %(b)24,026 7,559 128 
Four Corners Switchyards61.9 %(b)73,243 20,350 120 
Phoenix — Mead System17.1 %(b)39,705 20,055 51 
Palo Verde — Rudd 500kV System50.0 %95,736 31,118 391 
Morgan — Pinnacle Peak System64.7 %(b)119,785 25,791 96 
Round Valley System50.0 %548 193 — 
Palo Verde — Morgan System87.8 %(b)263,576 34,415 1,414 
Hassayampa — North Gila System80.0 %148,174 22,566 3,771 
Cholla 500kV Switchyard85.7 %8,100 2,380 — 
Saguaro 500kV Switchyard60.0 %21,656 13,809 — 
Kyrene — Knox System50.0 %578 336 — 
Agua Fria Switchyard10.0 %— — 32 
  
Percent
Owned
   
Plant in
Service
 
Accumulated
Depreciation
 
Construction
Work in
Progress
 
Generating facilities:  
    
  
  
 
Palo Verde Units 1 and 3 29.1% 
 $1,877,748
 $1,102,609
 $22,071
 
Palo Verde Unit 2 (a) 16.8% 
 634,545
 377,722
 11,831
 
Palo Verde Common 28.0% (b) 746,653
 290,084
 46,570
 
Palo Verde Sale Leaseback  
 (a) 351,050
 249,144
 
 
Four Corners Generating Station 63.0% 
 1,520,171
 559,272
 44,842
 
Cholla common facilities (c) 50.5% 
 184,608
 95,720
 1,323
 
Transmission facilities:  
    
  
  
 
ANPP 500kV System 33.5%  (b) 133,396
 51,248
 2,723
 
Navajo Southern System 26.7% (b) 89,672
 31,985
 194
 
Palo Verde — Yuma 500kV System 19.0% (b) 15,274
 6,486
 4,886
 
Four Corners Switchyards 63.0%  (b) 69,994
 16,674
 2,395
 
Phoenix — Mead System 17.1% (b) 39,355
 18,570
 53
 
Palo Verde — Rudd 500kV System 50.0% 
 93,112
 26,719
 317
 
Morgan — Pinnacle Peak System 64.6%  (b) 117,752
 18,822
 
 
Round Valley System 50.0% 
 515
 164
 
 
Palo Verde — Morgan System 88.9% (b) 238,689
 13,146
 
 
Hassayampa — North Gila System 80.0% 
 143,422
 12,676
 
 
Cholla 500kV Switchyard 85.7% 
 7,651
 1,597
 535
 
Saguaro 500kV Switchyard 60.0% 
 20,425
 12,949
 
 
Kyrene — Knox System 50.0% 
 578
 315
 
 
(a)See Note 19.
(b)Weighted-average of interests.
(c)PacifiCorp owns Cholla Unit 4 (see Note 4 for additional information) and APS operates the unit for PacifiCorp.  The common facilities at Cholla are jointly-owned.

(a)See Note 17.
See "Navajo Plant" in(b)Weighted-average of interests.
(c)PacifiCorp owns Cholla Unit 4 (see Note 3 for additional information), and APS operated the unit for PacifiCorp.  Cholla Unit 4 for more details.was retired on December 24, 2020. The common facilities at Cholla are jointly-owned.


 

166


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


11.10.    Commitments and Contingencies
 
Palo Verde Generating Station
 
Spent Nuclear Fuel and Waste Disposal
 
On December 19, 2012, APS, acting on behalf of itself and the participant owners of Palo Verde, filed a second breach of contract lawsuit against the DOE in the United States Court of Federal Claims ("(“Court of Federal Claims"Claims”).  The lawsuit sought to recover damages incurred due to DOE’s breach of the Contract for Disposal of Spent Nuclear Fuel and/or High Level Radioactive Waste ("(“Standard Contract"Contract”) for failing to accept Palo Verde'sVerde’s spent nuclear fuel and high level waste from January 1, 2007, through June 30, 2011, as it was required to do pursuant to the terms of the Standard Contract and the Nuclear Waste Policy Act.  On August 18, 2014, APS and DOE entered into a settlement agreement, stipulatingwhich required DOE to a dismissal of the lawsuit and payment by DOE topay the Palo Verde owners for certain specified costs incurred by Palo Verde during the period January 1, 2007, through June 30, 2011. In addition, the settlement agreement as amended, providesprovided APS with a method for submitting claims and getting recovery for costs incurred through December 31, 2019.2016, which was extended to December 31, 2022. An additional extension is currently pending.

APS has submitted 5eight claims pursuant to the terms of the August 18, 2014 settlement agreement, for fiveeight separate time periods during July 1, 2011 through June 30, 2018.2021. The DOE has approved and paid $84.3$123.9 million for these claims (APS’s share is $24.5$36.0 million). The amounts recovered were primarily recorded as adjustments to a regulatory liability and had no impact on reported net income. In accordance with the 2017 Rate Case Decision, this regulatory liability is being refunded to customers (seecustomers. See Note 4).4. On October 31, 2019,2022, APS filed its nextninth claim pursuant to the terms of the August 18, 2014 settlement agreement in the amount of $16$14.3 million (APS’s share is $4.7$4.2 million). OnIn February 11, 2020,2023, the DOE approved a payment of $15.4 million (APS’s share is $4.5 million).this claim.

Nuclear Insurance
 
Public liability for incidents at nuclear power plants is governed by the Price-Anderson Nuclear Industries Indemnity Act ("(“Price-Anderson Act"Act”), which limits the liability of nuclear reactor owners to the amount of insurance available from both commercial sources and an industry-wide retrospective payment plan.  In accordance with the Price-Anderson Act, the Palo Verde participants are insured against public liability for a nuclear incident of up to approximately $13.9$13.7 billion per occurrence. Palo Verde maintains the maximum available nuclear liability insurance in the amount of $450 million, which is provided by American Nuclear Insurers ("ANI").Insurers.  The remaining balance of approximately $13.5$13.2 billion of liability coverage is provided through a mandatory, industry-wide retrospective premium program.  If losses at any nuclear power plant covered by the program exceed the accumulated funds, APS could be responsible for retrospective premiums.  The maximum retrospective premium per reactor under the program for each nuclear liability incident is approximately $137.6 million, subject to a maximum annual premium of approximately $20.5 million per incident.  Based on APS’s ownership interest in the three Palo Verde units, APS’s maximum retrospective premium per incident for all 3three units is approximately $120.1 million, with a maximum annual retrospective premium of approximately $17.9 million.

The Palo Verde participants maintain insurance for property damage to, and decontamination of, property at Palo Verde in the aggregate amount of $2.8 billion.  APS has also secured accidental outage insurance for a sudden and unforeseen accidental outage of any of the 3three units. The property damage,
167


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

decontamination, and accidental outage insurance are provided by Nuclear Electric Insurance Limited ("NEIL"(“NEIL”).  APS is subject to retrospective premium adjustments under all NEIL policies if NEIL’s losses in any policy year exceed accumulatedaccumulated funds. TheThe maximum amount APS could incur under the current NEIL

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


policies totals approximately $25.5$22.3 million for each retrospective premium assessment declared by NEIL’s Board of Directors due to losses.  In addition,Additionally, at the sole discretion of the NEIL policies contain rating triggers thatBoard of Directors, APS would resultbe liable to provide approximately $62.8 million in APS providing approximately $73.4 million of collateral assurancedeposit premium within 20 business days of a rating downgraderequest as assurance to non-investment grade.satisfy any site obligation of retrospective premium assessment.  The insurance coverage discussed in this, and the previous paragraph is subject to certain policy conditions, sublimits, and exclusions.
 
Fuel and Purchased Power Commitments and Purchase Obligations
 
APS is party to various fuel and purchased power contracts and purchase obligations with terms expiring between 20202023 and 2043 that include required purchase provisions.  APS estimates the contract requirements to be approximately $590 million in 2020; $613 million in 2021; $624 million in 2022; $616$955 million in 2023; $581$823 million in 2024; $882 million in 2025; $905 million in 2026; $819 million in 2027; and $5.5$8.7 billion thereafter.  However, these amounts may vary significantly pursuant to certain provisions in such contracts that permit us to decrease required purchases under certain circumstances. These amounts include estimated commitments relating to purchased power lease contracts (seecontracts. See Note 9).8.
 
Of the various fuel and purchased power contracts mentioned above, some of those contracts for coal supply include take-or-pay provisions.  The current coal contracts with take-or-pay provisions have terms expiring through 2031.
 
The following table summarizes our estimated coal take-or-pay commitments (dollars in thousands):
 
  Years Ended December 31,
 2020 2021 2022 2023 2024 Thereafter
Coal take-or-pay commitments (a)$185,347
 $186,554
 $187,400
 $189,120
 $193,192
 $1,240,964
  Years Ended December 31,
 20232024202520262027Thereafter
Coal take-or-pay commitments (a)$216,729 $211,823 $232,594 $225,345 $204,845 $880,113 
 
(a)Total take-or-pay commitments are approximately $2.2 billion.  The total net present value of these commitments is approximately $1.6 billion.
(a)Total take-or-pay commitments are approximately $2.0 billion.  The total net present value of these commitments is approximately $1.6 billion.
 
APS may spend more to meet its actual fuel requirements than the minimum purchase obligations in our coal take-or-pay contracts. The following table summarizes actual amounts purchased under the coal contracts which include take-or-pay provisions for each of the last three years (dollars in thousands):
 Year Ended December 31,
 2019 2018 2017
Total purchases$204,888
 $206,093
 $165,220

 Years Ended December 31,
 202220212020
Total purchases$305,502 $219,958 $189,817 
168


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Renewable Energy Credits
 
APS has entered into contracts to purchase renewable energy credits to comply with the RES.  APS estimates the contract requirements to be approximately $36 million in 2020; $35 million in 2021; $31 million in 2022; $30 million in 2023; $28$29 million in 2024; $27 million in 2025; $23 million in 2026; $19 million in 2027; and $133$69 million thereafter.  These amounts do not include purchases of renewable energy credits that are bundled with energy.
 

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Coal Mine Reclamation Obligations

APS must reimburse certain coal providers for amounts incurred for final and contemporaneous coal mine reclamation.  We account for contemporaneous reclamation costs as part of the cost of the delivered coal.  We utilize site-specific studies of costs expected to be incurred in the future to estimate our final reclamation obligation.  These studies utilize various assumptions to estimate the future costs.  Based on the most recent reclamation studies, APS recorded an obligation for the coal mine final reclamation of approximately $166$179 million at December 31, 20192022, and $213$175 million at December 31, 2018.2021. Under our current coal supply agreements, APS expects to make payments for the final mine reclamation as follows: $17 million in 2020; $16 million in 2021; $17 million in 2022; $18 million in 2023; $19 million in 2024; $20 million in 2025; $21 million in 2026; $22 million in 2027; and $88$25 million thereafter. These funds are held in an escrow account and will be distributed to certain coal providers under the terms of the applicable coal supply agreements.  Any amendments to current coal supply agreements may change the timing of the contribution. Portionscontribution or cost of these funds will be held in anfinal reclamation. The annual payments to the escrow account and distributedfinal distribution to certain coal providers under the terms of the applicable coal supply agreements.may be subject to adjustments based on escrow earnings.

Superfund-Related Matters
 
The Comprehensive Environmental Response Compensation and Liability Act ("CERCLA"(“Superfund” or "Superfund"“CERCLA”) establishes liability for the cleanup of hazardous substances found contaminating the soil, water, or air. Those who released, generated, transported to, or disposed of hazardous substances at a contaminated site are among the parties who are potentially responsible ("PRPs"(“PRPs”). PRPs may be strictly, and often are jointly, and severally liable for clean-up. On September 3, 2003, EPA advised APS that EPA considers APS to be a PRP in the Motorola 52nd Street Superfund Site, Operable Unit 3 ("OU3"(“OU3”) in Phoenix, Arizona. APS has facilities that are within this Superfund site. APS and Pinnacle West have agreed with EPA to perform certain investigative activities of the APS facilities within OU3. In addition, on September 23, 2009, APS agreed with EPA and one other PRP to voluntarily assist with the funding and management of the site-wide groundwater remedial investigation and feasibility study ("(“RI/FS"FS”). Based upon discussions between the OU3 working group parties and EPA, along with the results of recent technical analyses prepared by the OU3 working group to supplement theThe RI/FS for OU3 was finalized and submitted to EPA at the end of 2022. APS anticipates finalizingcannot predict the RI/FS in the spring or summer of 2020. We estimate that ourEPAs timing with respect to this matter.APS’s estimated costs related to this investigation and study will beis approximately $2$3 million. We anticipateAPS anticipates incurring additional expenditures in the future, but because the overall investigation is not complete and ultimate remediation requirements are not yet finalized by EPA, at the present time expenditures related to this matter cannot be reasonably estimated.
 
On August 6, 2013, the Roosevelt Irrigation District ("RID"(“RID”) filed a lawsuit in Arizona District Court against APS and 24 other defendants, alleging that RID’s groundwater wells were contaminated by the release of hazardous substances from facilities owned or operated by the defendants.  The lawsuit also alleges that, under Superfund laws, the defendants are jointly and severally liable to RID.  The allegations against APS arise out of APS’s current and former ownership of facilities in and around OU3.  As part of a state governmental investigation into groundwater contamination in this area, on January 25, 2015, the
169


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

ADEQ sent a letter to APS seeking information concerning the degree to which, if any, APS’s current and former ownership of these facilities may have contributed to groundwater contamination in this area.  APS responded to ADEQ on May 4, 2015. On December 16, 2016, 2two RID environmental and engineering contractors filed an ancillary lawsuit for recovery of costs against APS and the other defendants in the RID litigation. That same day, another RID service provider filed an additional ancillary CERCLA lawsuit against certain of the defendants in the main RID litigation but excluded APS and certain other parties as named defendants. Because the ancillary lawsuits concern past costs allegedly incurred by these RID vendors, which were ruled unrecoverable directly by RID in November of 2016, the additional lawsuits do not increase APS'sAPS’s exposure or risk related to these matters.


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


On April 5, 2018, RID and the defendants in that particular litigation executed a settlement agreement, fully resolving RID'sRID’s CERCLA claims concerning both past and future cost recovery. APS'sAPS’s share of this settlement was immaterial. In addition, the 2two environmental and engineering vendors voluntarily dismissed their lawsuit against APS and the other named defendants without prejudice. An order to this effect was entered on April 17, 2018. With this disposition of the case, the vendors may file their lawsuit again in the future. On August 16, 2019, Maricopa County, one of the three direct defendants in the ancillary service provider lawsuit, filed a third-party complaint seeking contribution for its liability, if any, from APS and 28 other third-party defendants. While this lawsuit remains pending, on September 30, 2022, the U.S. District Court for the District of Arizona granted partial summary judgment to the direct defendants for $20.7 million of the $21 million in CERCLA response costs claimed by the service provider. We are unable to predict the outcome of these matters;any further litigation related to the remaining response costs at issue in this litigation; however, we do not expect the outcome to have a material impact on our financial position, results of operations, or cash flows.

On February 28, 2022, EPA provided APS with a request for information under CERCLA related to APS’s Ocotillo power plant site located in Tempe, Arizona. In particular, EPA seeks information from APS regarding APS’s use, storage, and disposal of substances containing per-and polyfluoroalkyl (“PFAS”) compounds at the Ocotillo power plant site in order to aid EPA’s investigation into actual or threatened releases of PFAS into groundwater within the South Indian Bend Wash (“SIBW”) Superfund site. The SIBW Superfund site includes the APS Ocotillo power plant site. APS filed its response to this information request on April 29, 2022. On January 17, 2023, EPA contacted APS to inform the Company that it would be commencing on-site investigations within the SIBW site, including the Ocotillo power plant, and performing a remedial investigation and feasibility study related to potential PFAS impacts to groundwater over the next two to three years. At the present time, we are unable to predict the outcome of this matter and expenditures related to this matter cannot be reasonably estimated.

Arizona Attorney General Matter

APS received civil investigative demands from the Attorney General seeking information pertaining to the rate plan comparison tool offered to APS customers and other related issues including implementation of rates from the 2017 Settlement Agreement and its Customer Education and Outreach Plan associated with the 2017 Settlement Agreement. APS fully cooperated with the Attorney General’s Office in this matter. On February 22, 2021, APS entered into a consent agreement with the Attorney General as a way to settle the matter. The settlement resulted in APS paying $24.75 million, approximately $24 million of which was returned to customers as restitution.

170


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Four Corners SCR Cost Recovery

As part of APS’s 2019 Rate Case, APS included recovery of the deferral and rate base effects of the Four Corners SCR project. On November 2, 2021, the 2019 Rate Case decision was approved by the ACC allowing approximately $194 million of SCR related plant investments and cost deferrals in rate base and to recover, depreciate and amortize in rates based on an end-of-life assumption of July 2031. The decision also included a partial and combined disallowance of $215.5 million on the SCR investments and deferrals. APS believes the SCR plant investments and related SCR cost deferrals were prudently incurred, and on December 17, 2021, APS filed its Notice of Direct Appeal at the Arizona Court of Appeals requesting review of the $215.5 million disallowance. The Arizona Court of Appeals heard oral arguments on November 30, 2022. The Court took the matter under advisement and will issue its decision in due course. Based on the partial recovery of these investments and cost deferrals in current rates and the uncertainty of the outcome of the legal appeals process, APS has not recorded an impairment or write-off relating to the SCR plant investments or deferrals as of December 31, 2022. If the 2019 Rate Case decision to disallow $215.5 million of the SCRs is ultimately upheld, APS will be required to record a charge to its results of operations, net of tax, of approximately $154.4 million. We cannot predict the outcome of the legal challenges nor the timing of when this matter will be resolved. See Note 3 for additional information regarding the Four Corners SCR cost recovery.
 
Environmental Matters
 
APS is subject to numerous environmental laws and regulations affecting many aspects of its present and future operations, including air emissions of both conventional pollutants and greenhouse gases,GHGs, water quality, wastewater discharges, solid waste, hazardous waste, and CCRs.  These laws and regulations can change from time to time, imposing new obligations on APS resulting in increased capital, operating, and other costs.  Associated capital expenditures or operating costs could be material.  APS intends to seek recovery of any such environmental compliance costs through our rates but cannot predict whether it will obtain such recovery.  The following proposed and final rules involve material compliance costs to APS.
 
Regional Haze Rules. APS has received the final rulemaking imposing new pollution control requirements on Four Corners. EPA required the plant to install pollution control equipment that constitutes BART to lessen the impacts of emissions on visibility surrounding the plant. In addition, EPA issued a final rule for Regional Haze compliance at Cholla that does not involve the installation of new pollution controls and that will replace an earlier BART determination for this facility. See below for details of the Cholla BART approval.

Four Corners. Based on EPA’s final standards, APS'sAPS’s 63% share of the cost of required controls for Four Corners Units 4 and 5 was approximately $400 million, which has been incurred.  In addition, APS and El Paso entered into an asset purchase agreement providing for the purchase by APS, or an affiliate of APS, of El Paso'sPaso’s 7% interest in Four Corners Units 4 and 5. 4CA purchased the El Paso interest on July 6, 2016. NTEC purchased the interest from 4CA on July 3, 2018. See "Four Corners - 4CA Matter" below for a discussion of the NTEC purchase. The cost of the pollution controls related to the 7% interest is approximately $45 million, which was assumed by NTEC through its purchase of the 7% interest.

Cholla. APS believed that EPA’s original 2012 In addition, EPA issued a final rule establishing controls constituting BART for Regional Haze compliance at Cholla which would requirethat does not involve the installation of SCRnew pollution controls was unsupported and that EPA had no basiswill replace an earlier BART determination for disapproving Arizona’s State Implementation Plan ("SIP") and promulgating a FIP that was inconsistent with the state’s considered BART determinations under the regional haze program.  In September 2014, APS met with EPA to propose a compromise BART strategy, whereby APS would permanently close Cholla Unit 2 and cease burning coal at Units 1 and 3 by the mid-2020s. (See "Cholla"this facility. See “Cholla” in Note 43 for information regarding future plans for Cholla and details related to the resulting regulatory asset.) APS made the proposal with the understanding that additional emission control equipment is unlikely to be required in the future because retiring and/or converting the units as contemplated in the proposal is more cost effective than, and will result in increased visibility improvement over, the BART requirements for oxides of nitrogen ("NOx") imposed through EPA's BART FIP. In early 2017, EPA approved a final rule incorporating APS's compromise proposal, which took effect for Cholla on April 26, 2017.
 

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Coal Combustion Waste. On December 19, 2014, EPA issued its final regulations governing the handling and disposal of CCR, such as fly ash and bottom ash. The rule regulates CCR as a non-hazardous waste under Subtitle D of the Resource Conservation and Recovery Act ("RCRA"(“RCRA”) and establishes national
171


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

minimum criteria for existing and new CCR landfills and surface impoundments and all lateral expansions. These criteria include standards governing location restrictions, design and operating criteria, groundwater monitoring and corrective action, closure requirements and post closure care, and recordkeeping, notification, and internet posting requirements. The rule generally requires any existing unlined CCR surface impoundment that is contaminating groundwater above a regulated constituent’s groundwater protection standard to stop receiving CCR and either retrofit or close, and further requires the closure of any CCR landfill or surface impoundment that cannot meet the applicable performance criteria for location restrictions or structural integrity. Such closure requirements are deemed "forced closure"“forced closure” or "closure“closure for cause"cause” of unlined surface impoundments and are the subject of recent regulatory and judicial activities described below.

Since these regulations were finalized, EPA has taken steps to substantially modify the federal rules governing CCR disposal. While certain changes have been prompted by utility industry petitions, others have resulted from judicial review, court-approved settlements with environmental groups, and statutory changes to RCRA. The following lists the pending regulatory changes that, if finalized, could have a material impact as to how APS manages CCR at its coal-fired power plants:

Following the passage of the Water Infrastructure Improvements for the Nation Act in 2016, EPA possesses authority to either authorize states to develop their own permit programs for CCR management or issue federal permits governing CCR disposal both in states without their own permit programs and on tribal lands. Although ADEQ has taken steps to develop a CCR permitting program, including supporting the passage of new state legislation providing ADEQ with appropriate permitting authority for CCR under the state solid waste management program, it is not clear when that program will be put into effect. On December 19, 2019, EPA proposed its own set of regulations governing the issuance of CCR management permits. The proposal remains pending.

On March 1, 2018, as a result of a settlement with certain environmental groups, EPA proposed adding boron to the list of constituents that trigger corrective action requirements to remediate groundwater impacted by CCR disposal activities. Apart from a subsequent proposal issued on August 14, 2019, to add a specific, health-based groundwater protection standard for boron, EPA has yet to take action on this proposal.

BasedWith respect to APS’s Cholla facility, APS’s application for alternative closure was submitted to EPA on an August 21, 2018 D.C. Circuit decision, which vacated and remanded those provisionsNovember 30, 2020. While EPA has deemed APS’s application administratively “complete,” the Agency’s approval remains pending. If granted, this application would allow the continued disposal of the EPA CCR regulations that allow for the operation ofwithin Cholla’s existing unlined CCR surface impoundments EPA recently proposed corresponding changes to federal CCR regulations. On November 4, 2019, EPA proposed that all unlined CCR surface impoundments, regardless of their impact (or lack thereof) upon surrounding groundwater, must cease operation and initiate closure by August 31, 2020 (with an optional three-month extension as neededuntil the required date for the completion of alternative disposal capacity).

On November 4, 2019, EPA also proposed to change the manner by which facilities that have committed to cease burning coalceasing coal-fired boiler operations in the near-term may qualify for alternative closure. Such qualification would allow CCR disposal units at these plants to continue operating, even though they would otherwiseApril 2025. This application will be subject to forced closure under the federal CCR regulations. EPA’s proposalpublic comment and, potentially, judicial review. We expect to have a proposed decision from EPA regarding alternative closure would require express EPA authorization for such facilities to continue operating their CCR disposal units under alternative closure.Cholla sometime in 2023.

We cannot at this time predict the outcome of these regulatory proceedings or when the EPA will take final action. action on those matters that are still pending.Depending on the eventual outcome, the costs associated with APS’s management of CCR could materially increase, which could affect APS’s financial position, results of operations, or cash flows.

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS



APS currently disposes of CCR in ash ponds and dry storage areas at Cholla and Four Corners. APS estimates that its share of incremental costs to comply with the CCR rule for Four Corners is
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COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

approximately $22$30 million and its share of incremental costs to comply with the CCR rule for Cholla is approximately $15$16 million. The Navajo Plant currently disposesdisposed of CCR only in a dry landfill storage area. To comply with the CCR rule for the Navajo Plant, APS'sAPS’s share of incremental costs iswas approximately $1 million, which has been incurred. Additionally, the CCR rule requires ongoing, phased groundwater monitoring.

As of October 2018, APS has completed the statistical analyses for its CCR disposal units that triggered assessment monitoring. APS determined that several of its CCR disposal units at Cholla and Four Corners will need to undergo corrective action. In addition, under the current regulations, all such disposal units must ceasehave ceased operating and initiateinitiated closure by October 31, 2020.April 11, 2021, at the latest (except for those disposal units subject to alternative closure). APS initiated an assessmentcompleted the assessments of corrective measures on JanuaryJune 14, 20192019; however, additional investigations and expects such assessmentengineering analyses that will continue through mid- to late-2020. As part of this assessment, APS continues to gather additional groundwater data and perform remedial evaluations as tosupport the CCR disposal units at Cholla and Four Corners undergoing corrective action.remedy selection are still underway. In addition, APS will also solicit input from the public and host public hearings and select remedies as part of this process. Based on the work performed to date, APS currently estimates that its share of corrective action and monitoring costs at Four Corners will likely range from $10 million to $15 million, which would be incurred over 30 years. The analysis needed to perform a similar cost estimate for Cholla remains ongoing at this time. As APS continues to implement the CCR rule’s corrective action assessment process, the current cost estimates may change. Given uncertainties that may exist until we have fully completed the corrective action assessment process, weAPS cannot predict any ultimate impacts to the Company; however, at this time we doAPS does not believe the cost estimates for Cholla and any potential change to the cost estimate for Four Corners would have a material impact on ourits financial position, results of operations, or cash flows.

Clean Power Plan/Affordable Clean Energy Regulations. On June 19, 2019, EPA took final action on its proposals to repeal EPA'sEPA’s 2015 Clean Power Plan (“CPP”) and replace those regulations with a new rule, the Affordable Clean Energy (“ACE”) regulations. EPA originally finalized the CPP on August 3, 2015, and those regulationssuch rules would have had been stayed pending judicial review.

Thefar broader impact on the electric power sector than the ACE regulations. On January 19, 2021, the U.S. Court of Appeals for the D.C. Circuit vacated the ACE regulations are based upon measures that can be implementedand remanded them back to improveEPA to develop new existing power plant carbon regulations consistent with the heat ratecourt’s ruling. That decision, which endorsed an expansive view of steam-electricthe federal Clean Air Act consistent with EPA’s 2015 CPP, was subsequently reversed by the U.S. Supreme Court on June 30, 2022.While the current administration has expressed its intent to develop new carbon emission regulations governing existing power plants specifically coal-fired EGUs. In contrast withsometime in 2023, such action will be constrained by the U.S. Supreme Court’s decision that the CPP EPA's ACE regulations would not involve utility-level generation dispatch shifting away from coal-fired generation and toward renewable energy resources and natural gas-fired combined cycle power plants. EPA’s ACE regulations provide states and EPA regions such asviolated the Navajo Nation with three years to develop plans establishing source-specific standards of performance based upon application of the ACE rule’s heat-rate improvement emission guidelines. While corresponding New Source Review (“NSR”) reform regulations were proposed as part of EPA’s initial ACE proposal, the finalized ACE regulations did not include such reform measures. EPA announced that it will be taking final action on EPA's NSR reform proposal for EGUs in the near future.

WeClean Air Act.Nonetheless, we cannot at this time predict the outcome of EPA's regulatory actions repealing and replacing the CPP. Various state governments, industry organizations, and environmental and public-health public interest groups have filed lawsuits in the D.C. Circuit challenging the legality of EPA’s action, both in repealing the CPP and issuing the ACE regulations. In addition,pending EPA rulemaking proceedings related to the extent that the ACE regulations go into effect as finalized, it is not yet clear how the state of Arizona or EPA will implement these regulations as applied to APS’s coal-fired EGUs. In light of these uncertainties, APS is still evaluating the impact of the ACE regulations on its coal-fired generation fleet.carbon emissions from existing power plants.


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Other environmental rules that could involve material compliance costs include those related to effluent limitations, the ozone national ambient air quality standard and other rules or matters involving the Clean Air Act, Clean Water Act, Endangered Species Act, RCRA, Superfund, the Navajo Nation, and water supplies for our power plants. The financial impact of complying with current and future environmental rules could jeopardize the economic viability of our coalfossil-fuel powered plants or the willingness or ability of power plant participants to fund any required equipment upgrades or continue their participation in these plants. The economics of continuing to own certain resources, particularly our coal plants, may deteriorate, warranting early retirement of those plants, which may result in asset impairments. APS would seek recovery in rates for the book value of any remaining investments in the plants as well as other costs related to early retirement but cannot predict whether it would obtain such recovery.
173

Federal Agency Environmental Lawsuit Related to Four Corners
On April 20, 2016, several environmental groups filed a lawsuit against the Office of Surface Mining Reclamation and Enforcement ("OSM") and other federal agencies in the District of Arizona in connection with their issuance of the approvals that extended the life of Four Corners and the adjacent mine.  The lawsuit alleges that these federal agencies violated both the Endangered Species Act ("ESA") and the National Environmental Policy Act ("NEPA") in providing the federal approvals necessary to extend operations at the Four Corners Power Plant and the adjacent Navajo Mine past July 6, 2016.  APS filed a motion to intervene in the proceedings, which was granted on August 3, 2016.

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
On September 15, 2016, NTEC, the company that owns the adjacent mine, filed a motion to intervene for the purpose of dismissing the lawsuit based on NTEC's tribal sovereign immunity. On September 11, 2017, the Arizona District Court issued an order granting NTEC's motion, dismissing the litigation with prejudice, and terminating the proceedings. On November 9, 2017, the environmental group plaintiffs appealed the district court order dismissing their lawsuit. On July 29, 2019, the Ninth Circuit Court of Appeals affirmed the September 2017 dismissal of the lawsuit, after which the environmental group plaintiffs petitioned the Ninth Circuit for rehearing on September 12, 2019. The Ninth Circuit denied this petition for rehearing on December 11, 2019.

Four Corners National Pollutant Discharge Elimination System ("NPDES"(“NPDES”) Permit

On July 16, 2018, several environmental groups filed a petition for review before the EPA Environmental Appeals Board ("EAB") concerning theThe latest NPDES wastewater discharge permit for Four Corners which was reissuedissued on June 12, 2018.  TheSeptember 30, 2019.Based upon a November 1, 2019, filing by several environmental groups, allege that the permit was reissued in contravention of several requirements under the Clean Water Act and did not contain required provisions concerning EPA’s 2015 revised effluent limitation guidelines for steam-electric EGUs, 2014 existing-source regulations governing cooling-water intake structures, and effluent limits for surface seepage and subsurface discharges from coal-ash disposal facilities.  To address certain of these issues through a reconsidered permit, EPAEnvironmental Appeals Board (“EAB”) took action on December 19, 2018 to withdraw the NPDES permit reissued in June 2018. Withdrawalup review of the permit moots the EAB appeal, and EPA filed a motion to dismiss on that basis. The EAB thereafter dismissed the environmental group appeal on February 12, 2019. Four Corners NPDES Permit.EPA then issued a revised final NPDES permit for Four Corners on September 30, 2019. This permit is now subject to a petition for review before the EPA Environmental Appeals Board, basedBased upon a November 1, 2019, filing by several environmental groups. We cannot predictgroups, the outcomeEAB again took up review of the Four Corners NPDES Permit.Oral argument on this appeal was held on September 3, 2020, and the EAB denied the environmental group petition on September 30, 2020. While on January 22, 2021, the environmental groups filed a petition for review of the EAB’s decision with the U.S. Court of Appeals for the Ninth Circuit, the parties to this litigation (including APS) finalized a settlement on May 2, 2022. This settlement requires investigation of thermal wastewater discharges from Four Corners, administratively closes the litigation filed in January of 2021, and whether the review willis not expected to have a material impact on ourAPS’s financial position, results of operations, or cash flows.


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Four Corners

4CA Matter


On July 6, 2016, 4CA purchased El Paso’s 7% interest in Four Corners. NTEC had the option to purchase thepurchased this 7% interest and ultimately purchased the interest on July 3, 2018,. from 4CA. NTEC purchased the 7% interest at 4CA’s book value, approximately $70 million, and is payingpaid 4CA the purchase price over a period of four years pursuant to a secured interest-bearing promissory note. note, which was paid in full as of June 30, 2022.

In connection with the sale, Pinnacle West guaranteed certain obligations that NTEC will have to the other owners of Four Corners, such as NTEC'sNTEC’s 7% share of capital expenditures and operating and maintenance expenses. Pinnacle West'sWest’s guarantee is secured by a portion of APS'sAPS’s payments to be owed to NTEC under the 2016 Coal Supply Agreement.

BCE Matters

Tenaska Clear Creek Wind, LLC, the developer, owner, and operator of the Clear Creek wind farm, has disputed the proposed cost allocation of system upgrades related to connecting the Clear Creek wind farm to the transmission system and filed a complaint with FERC on May 21, 2021, which was denied on September 9, 2022. Subsequently, Tenaska Clear Creek Wind, LLC filed with FERC a request for rehearing and a motion for stay of the September 9, 2022 order. On October 7, 2022, the request for rehearing was denied by FERC. FERC has not ruled on the motion for stay. Clear Creek has filed a Petition for Review with the U.S. Court of Appeals and Motion for Stay Pending Appeal, both of which are still pending.

Tenaska Clear Creek Wind, LLC filed a second complaint with FERC on May 25, 2022, alleging that the wind farm was being curtailed in a discriminatory manner. The 2016 Coal Supply Agreement contained alternate pricing termsMay 25, 2022 Complaint was denied by FERC on December 15, 2022 and Tenaska Clear Creek Wind, LLC requested Rehearing of the denial on January 13, 2023.

Due to the disputed system upgrades and the related curtailment, the Clear Creek wind farm has experienced a significant reduction in power generation that has had a material adverse impact on the project’s ability to generate cash flow for investors. These energy curtailments are expected to persist, unless and until system upgrades are implemented to alleviate the present transmission system congestion,
174


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

or the disputes are determined in favor of, or settled in a manner favorable to, Tenaska Clear Creek Wind, LLC. As such, during the fourth quarter of 2022, due to these on-going disputes, cost allocation uncertainties, and no probable favorable resolution, BCE determined its equity method investment was fully impaired. Prior to the impairment, the investment had a carrying value of $17.1 million, which has been written-down to reflect the investment’s estimated fair value of zero as of December 31, 2022. Pinnacle West’s Consolidated Statement of Income for the 7% interest in the event NTEC did not purchase the interest. Until the time that NTEC purchased the 7% interest, the alternate pricing provisions were applicable to 4CA as the holder of the 7% interest. These terms included a formula under which NTEC must make certain payments to 4CA for reimbursement of operations and maintenance costs and a specified rate of return, offset by revenue generated by 4CA’s power sales. The amount under this formula for calendar year 2018 (up to the date that NTEC purchased the 7% interest) is approximately $10 million, which was due to 4CA onended December 31, 2019. Such payment was satisfied in January 2020 by NTEC directing2022 includes an after-tax loss of $12.8 million relating to 4CA a prepayment from APS of future coal payment obligations.this impairment.

Financial Assurances
 
In the normal course of business, we obtain standby letters of credit and surety bonds from financial institutions and other third parties. These instruments guarantee our own future performance and provide third parties with financial and performance assurance in the event we do not perform. These instruments support commodity contract collateral obligations and other transactions. As of December 31, 2019,2022, standby letters of credit totaled $1.7approximately $10 million and will expire in 2020.2023. As of December 31, 2019,2022, surety bonds expiring through 20202025 totaled $14approximately $8 million. The underlying liabilities insured by these instruments are reflected on our balance sheets, where applicable. Therefore, no additional liability is reflected for the letters of credit and surety bonds themselves.
 
We enter into agreements that include indemnification provisions relating to liabilities arising from or related to certain of our agreements.  Most significantly, APS has agreed to indemnify the equity participants and other parties in the Palo Verde sale leaseback transactions with respect to certain tax matters.  Generally, a maximum obligation is not explicitly stated in the indemnification provisions and, therefore, the overall maximum amount of the obligation under such indemnification provisions cannot be reasonably estimated.  Based on historical experience and evaluation of the specific indemnities, we do not believe that any material loss related to such indemnification provisions is likely.
 
Pinnacle West has issued parental guarantees and has provided indemnification under certain surety bonds for APS which were not material at December 31, 2019.2022. In connection with the sale of 4CA's4CA’s 7% interest to NTEC, Pinnacle West is guaranteeing certain obligations that NTEC will have to the other owners of Four Corners. (See "FourSee “Four Corners - 4CA Matter"Matter” above for information related to this guarantee.) Pinnacle West has not needed to perform under this guarantee. A maximum obligation is not explicitly stated in the guarantee and, therefore, the overall maximum amount of the obligation under such guarantee cannot be reasonably estimated; however, we consider the fair value of this guarantee, including expected credit losses, to be immaterial.

In connection with BCE’s acquisition of minority ownership positions in the Clear Creek wind farm in Missouri and Nobles 2 wind farms,farm in Minnesota, Pinnacle West has issued parental guarantees to guarantee the obligations of BCE subsidiaries to make required equity contributions to fund project construction (the “Equity Contribution Guarantees”) and to

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


make production tax credit funding payments to borrowers of the projects (the “PTC Guarantees”). The amounts guaranteed by Pinnacle West reduceare reduced as payments are made under the respective guaranteedguarantee agreements. The Equity Contribution Guarantees are currently anticipated to be terminated upon completionAs of construction of the respective projects, which is anticipated to occur prior to December 31, 2020, and2022 there is approximately $34 million of remaining guarantees primarily relating to the PTC Guarantees (approximately $40 million as of December 31, 2019) are currentlythat is expected to be terminated ten years followingterminate by 2030.

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COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

In connection with the commercial operation datecredit agreement entered into by a special purpose subsidiary of BCE on February 11, 2022, Pinnacle West has issued a guarantee of up to $42 million primarily related to the applicable project.   
12.     Asset Retirement Obligationsbridge loan. See Note 6 for additional details.
 
11.     Asset Retirement Obligations
In 2022, APS did not revise any cost estimates related to existing AROs, and no new AROs were necessary.

In 2019,2021, APS receivedrevised its cost estimates for existing AROs at Cholla related to updated decommissioning estimates for the Navajo Plant closure in December 2019, which resulted in a decrease to the ARO in the amount of $8 million (see Note 4 for additional information). In addition, APS received a new decommissioning study for Palo Verde. This resulted in a decrease to the ARO in the amount of $89 million, a decrease in plant in service of $80 millionponds and a reduction in the regulatory liability of $9 million.

In 2018, APS recognized an ARO for the removal of hazardous waste containing solar panels at all of our utility scale solar plants,facilities, which resulted in an increase to the ARO of approximately $28 million. See additional details in the amount of $14 million. In addition, due to the sale of 4CA assets to NTEC in 2018 (see Note 11 for more information on 4CA matters) there was a decrease to the ARO of $9 million. APS recognized an ARO of $7 million for rooftop solar removals in accordance with the obligations included in the customer contracts, which requires APS to remove the panels at the end of the contract lifeNotes 3 and includes the costs for the disposal of hazardous materials in accordance with environmental regulations. Finally, APS has other ARO adjustments resulting in a net decrease of $1 million.10.

The following table shows the change in our asset retirement obligations for 2019 and 2018AROs (dollars in thousands):

 2019 2018
Asset retirement obligations at the beginning of year$726,545
 $679,529
Changes attributable to: 
  
Accretion expense39,726
 36,876
Settlements(12,591) (9,726)
Estimated cash flow revisions(96,462) 2,002
Newly incurred or acquired obligations
 17,864
Asset retirement obligations at the end of year$657,218
 $726,545

 20222021
Asset retirement obligations at the beginning of year$767,382 $705,083 
Changes attributable to:  
Accretion expense41,240 38,437 
Settlements(10,860)(4,111)
Estimated cash flow revisions— 27,973 
Asset retirement obligations at the end of year$797,762 $767,382 
 
In accordance with regulatory accounting, APS accrues removal costs for its regulated utility assets, even if there is no legal obligation for removal.  See detail of regulatory liabilities in Note 4.3.


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


13.    Selected Quarterly Financial Data (Unaudited)

Consolidated quarterly financial information for 2019 and 2018 is provided in the tables below (dollars in thousands, except per share amounts).  Weather conditions cause significant seasonal fluctuations in our revenues; therefore, results for interim periods do not necessarily represent results expected for the year.

 2019 Quarter Ended 2019
 March 31, June 30, September 30, December 31, Total
Operating revenues$740,530
 $869,501
 $1,190,787
 $670,391
 $3,471,209
Operations and maintenance245,634
 227,543
 238,582
 229,857
 941,616
Operating income60,084
 196,589
 403,290
 11,997
 671,960
Income taxes2,418
 17,080
 53,266
 (88,537) (15,773)
Net income22,791
 149,019
 317,149
 68,854
 557,813
Net income attributable to common shareholders17,918
 144,145
 312,276
 63,981
 538,320
          
Earnings Per Share: 
  
  
  
  
Net income attributable to common shareholders — Basic$0.16
 $1.28
 $2.78
 $0.57
 $4.79
Net income attributable to common shareholders — Diluted0.16
 1.28
 2.77
 0.57
 4.77
 2018 Quarter Ended 2018
 March 31, June 30, September 30, December 31, Total
Operating revenues$692,714
 $974,123
 $1,268,034
 $756,376
 $3,691,247
Operations and maintenance265,682
 268,397
 246,545
 256,120
 1,036,744
Operating income31,334
 242,162
 433,307
 66,884
 773,687
Income taxes(1,265) 44,039
 84,333
 6,795
 133,902
Net income8,094
 171,612
 319,885
 30,949
 530,540
Net income attributable to common shareholders3,221
 166,738
 315,012
 26,076
 511,047
          
Earnings Per Share: 
  
  
  
  
Net income attributable to common shareholders — Basic$0.03
 $1.49
 $2.81
 $0.23
 $4.56
Net income attributable to common shareholders — Diluted0.03
 1.48
 2.80
 0.23
 4.54


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS



Selected Quarterly Financial Data (Unaudited) - APS
APS's quarterly financial information for 2019 and 2018 is as follows (dollars in thousands):
 2019 Quarter Ended 2019
 March 31, June 30, September 30, December 31, Total
Operating revenues$740,530
 $869,501
 $1,190,787
 $670,391
 $3,471,209
Operations and maintenance240,375
 224,143
 235,440
 226,758
 926,716
Operating income65,377
 200,018
 406,465
 15,124
 686,984
Net income attributable to common shareholder28,276
 150,176
 318,870
 67,949
 565,271
 2018 Quarter Ended 2018
 March 31, June 30, September 30, December 31, Total
Operating revenues$692,006
 $971,963
 $1,267,997
 $756,376
 $3,688,342
Operations and maintenance254,601
 251,999
 226,346
 236,281
 969,227
Operating income37,878
 251,590
 453,547
 86,753
 829,768
Net income attributable to common shareholder9,599
 177,825
 338,366
 44,475
 570,265

14.12.    Fair Value Measurements
 
We classify our assets and liabilities that are carried at fair value within the fair value hierarchy.  This hierarchy ranks the quality and reliability of the inputs used to determine fair values, which are then classified and disclosed in one of three categories.  The three levels of the fair value hierarchy are:
 
Level 1 — UnadjustedInputs are unadjusted quoted prices in active markets for identical assets or liabilities at the measurement date.

Level 2 — Other significant observable inputs, including quoted prices in active markets for similar assets or liabilities; quoted prices in markets that are not active, and model-derived valuations whose inputs are observable (such as yield curves). 
 
Level 3 — Valuation models with significant unobservable inputs that are supported by little or no market activity.  Instruments in this category may include long-dated derivative transactions where valuations are unobservable due to the length of the transaction, options, and transactions in locations where observable market data does not exist.  The valuation models we employ utilize spot prices, forward prices, historical market data and other factors to forecast future prices.
 
Assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.  Thus, a valuation may be classified in Level 3 even though the
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COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

valuation may include significant inputs that are readily observable.  We maximize the use of observable inputs and minimize the use of unobservable inputs.  We rely primarily on the market approach of using prices and other market information for identical and/or comparable assets and liabilities.  If market data is not readily available, inputs may reflect our own assumptions about the inputs market participants would use.  Our assessment of the inputs and the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of fair value assets and liabilities as well as their placement within the fair value hierarchy levels.  We assess whether a market is active by obtaining observable broker quotes, reviewing actual market activity,

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


and assessing the volume of transactions.  We consider broker quotes observable inputs when the quote is binding on the broker, we can validate the quote with market activity, or we can determine that the inputs the broker used to arrive at the quoted price are observable.

Certain instruments have been valued using the concept of NAV, as a practical expedient. These instruments are typically structured as investment companies offering shares or units to multiple investors for the purpose of providing a return. These instruments are similar to mutual funds; however, their NAV is generally not published and publicly available, nor are these instruments traded on an exchange. Instruments valued using NAV as a practical expedient are included in our fair value disclosuresdisclosures; however, in accordance with GAAP are not classified within the fair value hierarchy levels.

Recurring Fair Value Measurements
 
We apply recurring fair value measurements to cash equivalents, derivative instruments, and investments held in the nuclear decommissioning trusttrusts and other special use funds. On an annual basis, we apply fair value measurements to plan assets held in our retirement and other benefit plans. See Note 87 for fair value discussion of plan assets held in our retirement and other benefit plans.
 
Cash Equivalents
 
Cash equivalents represent certain investments in money market funds that are valued using quoted prices in active markets.

Risk Management Activities — Energy Derivative Instruments
 
Exchange traded commodity contracts are valued using unadjusted quoted prices.  For non-exchange traded commodity contracts, we calculate fair value based on the average of the bid and offer price, discounted to reflect net present value.  We maintain certain valuation adjustments for a number of risks associated with the valuation of future commitments.  These include valuation adjustments for liquidity and credit risks.  The liquidity valuation adjustment represents the cost that would be incurred if all unmatched positions were closed out or hedged.  The credit valuation adjustment represents estimated credit losses on our net exposure to counterparties, taking into account netting agreements, expected default experience for the credit rating of the counterparties and the overall diversification of the portfolio.  We maintain credit policies that management believes minimize overall credit risk.
 
Certain non-exchange traded commodity contracts are valued based on unobservable inputs due to the long-term nature of contracts, characteristics of the product, or the unique location of the transactions.  Our long-dated energy transactions consist of observable valuations for the near-term portion and unobservable valuations for the long-term portions of the transaction.  We rely primarily on broker quotes to value these instruments.  When our valuations utilize broker quotes, we perform various control procedures to ensure the quote has been developed consistent with fair value accounting guidance.  These controls include assessing the quote for reasonableness by comparison against other broker quotes, reviewing historical price relationships, and assessing market activity.  When broker quotes are not available, the primary valuation technique used to calculate the fair value is the extrapolation of forward
177


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

pricing curves using observable market data for more liquid delivery points in the same region and actual transactions at more illiquid delivery points.
 
When the unobservable portion is significant to the overall valuation of the transaction, the entire transaction is classified as Level 3. 

Risk Management Activities — Interest Rate Derivatives

Our classification ofinterest rate derivative instruments relate to an interest rate swap, which is valued using financial models that utilize observable inputs for similar instruments and are classified as Level 3 is primarily reflective2. Inputs include yield curves and credit quality of the long-term nature of our energy transactions.

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Our energy risk management committee, consisting of officers and key management personnel, oversees our energy risk management activities to ensure compliance with our stated energy risk management policies.  We have a risk control function that is responsible for valuing our derivative commodity instruments in accordance with established policies and procedures.  The risk control function reports to the chief financial officer’s organization.counterparties.
 
Investments Held in Nuclear Decommissioning TrustTrusts and Other Special Use Funds
 
The nuclear decommissioning trusttrusts and other special use funds invest in fixed income and equity securities. Other special use funds include the coal reclamation escrow account and the active union employee medical trust.account. See Note 2018 for additional discussion about our investment accounts.

We value investments in fixed income and equity securities using information provided by our trustees and escrow agent. Our trustees and escrow agent use pricing services that utilize the valuation methodologies described below to determine fair market value. We have internal control procedures designed to ensure this information is consistent with fair value accounting guidance. These procedures include assessing valuations using an independent pricing source, verifying that pricing can be supported by actual recent market transactions, assessing hierarchy classifications, comparing investment returns with benchmarks, and obtaining and reviewing independent audit reports on the trustees’ and escrow agent'sagent’s internal operating controls and valuation processes.

Fixed Income Securities

Fixed income securities issued by the U.S. Treasury are valued using quoted active market prices and are typically classified as Level 1.  Fixed income securities issued by corporations, municipalities, and other agencies, including mortgage-backed instruments, are valued using quoted inactive market prices, quoted active market prices for similar securities, or by utilizing calculations which incorporate observable inputs such as yield curves and spreads relative to such yield curves.  These fixed income instruments are classified as Level 2.  Whenever possible, multiple market quotes are obtained which enables a cross-check validation.  A primary price source is identified based on asset type, class, or issue of securities.

Fixed income securities may also include short-term investments in certificates of deposit, variable rate notes, time deposit accounts, U.S. Treasury and Agency obligations, U.S. Treasury repurchase agreements, commercial paper, and other short termshort-term instruments. These instruments are valued using active market prices or utilizing observable inputs described above.

Equity Securities

The nuclear decommissioning trust'strusts’ equity security investments are held indirectly through commingled funds.  The commingled funds are valued using the funds'funds’ NAV as a practical expedient. The funds'funds’ NAV is primarily derived from the quoted active market prices of the underlying equity securities
178


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

held by the funds. We may transact in these commingled funds on a semi-monthly basis at the NAV.  The commingled funds are maintained by a bank and hold investments in accordance with the stated objective of tracking the performance of the S&P 500 Index.  Because the commingled funds'funds’ shares are offered to a limited group of investors, they are not considered to be traded in an active market. As these instruments are valued using NAV, as a practical expedient, they have not been classified within the fair value hierarchy.


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


The nuclear decommissioning trusttrusts and other special use funds may also hold equity securities that include exchange traded mutual funds and money market accounts for short-term liquidity purposes. These short-term, highly-liquid investments are valued using active market prices.

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Fair Value Tables

The following table presents the fair value at December 31, 20192022, of our assets and liabilities that are measured at fair value on a recurring basis (dollars in thousands):

Level 1Level 2Level 3OtherTotal
ASSETS
Risk management activities — derivative instruments:
Commodity contracts$— $127,129 $26,132 $(21,163)(a)$132,098 
Interest rate swaps— 131 — — 131 
Subtotal risk management activities - derivative instruments— 127,260 26,132 (21,163)132,229 
Nuclear decommissioning trust:
Equity securities14,658 — — 3,827 (b)18,485 
U.S. commingled equity funds— — — 472,582 (c)472,582 
U.S. Treasury debt211,923 — — — 211,923 
Corporate debt— 149,226 — — 149,226 
Mortgage-backed securities— 147,938 — — 147,938 
Municipal bonds— 64,881 — — 64,881 
Other fixed income— 8,375 — — 8,375 
Subtotal nuclear decommissioning trust226,581 370,420 — 476,409 1,073,410 
Other special use funds:
Equity securities66,974 — — 963 (b)67,937 
U.S. Treasury debt275,267 — — — 275,267 
Municipal bonds— 4,027 — — 4,027 
Subtotal other special use funds342,241 4,027 — 963 347,231 
Total assets$568,822 $501,707 $26,132 $456,209 $1,552,870 
LIABILITIES
Risk management activities — derivative instruments:
Commodity contracts$— $(25,874)$(31,020)$15,357 (a)$(41,537)
Interest rate swaps— (909)— — (909)
Subtotal risk management activities - derivative instruments— (26,783)(31,020)15,357 (42,446)
Total liabilities$— $(26,783)$(31,020)$15,357 $(42,446)
(a)Represents counterparty netting, margin, and collateral. See Note 15.
(b)Represents net pending securities sales and purchases.
(c)Valued using NAV as a practical expedient and, therefore, are not classified in the fair value hierarchy.
180


Level 1
Level 2
Level 3
Other


Total
Assets















Risk management activities — derivative instruments:











Commodity contracts$

$551

$33

$(69)
(a)
$515
Nuclear decommissioning trust:











Equity securities10,872





2,401

(b)
13,273
U.S. commingled equity funds





518,844

(c)
518,844
U.S. Treasury debt160,607









160,607
Corporate debt

115,869







115,869
Mortgage-backed securities

118,795







118,795
Municipal bonds

73,040







73,040
Other fixed income

10,347







10,347
Subtotal nuclear decommissioning trust171,479

318,051



521,245



1,010,775












Other special use funds:










Equity securities7,142





474

(b)
7,616
U.S. Treasury debt232,848









232,848
Municipal bonds

4,631







4,631
Subtotal other special use funds239,990

4,631



474



245,095












Total assets$411,469

$323,233

$33

$521,650



$1,256,385
Liabilities















Risk management activities — derivative instruments:















Commodity contracts$

$(67,992)
$(3,429)
$(711)
(a)
$(72,132)

(a)Represents counterparty netting, margin, and collateral. See Note 17.
(b)Represents net pending securities sales and purchases.
(c)Valued using NAV as a practical expedient and, therefore, are not classified in the fair value hierarchy.




COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


 The following table presents the fair value at December 31, 20182021, of our assets and liabilities that are measured at fair value on a recurring basis (dollars in thousands):
 
Level 1Level 2Level 3OtherTotal
ASSETS
Risk management activities — derivative instruments:
Commodity contracts$— $115,079 $— $(4,690)(a)$110,389 
Nuclear decommissioning trust:
Equity securities45,264 — — (27,782)(b)17,482 
U.S. commingled equity funds— — — 595,048 (c)595,048 
U.S. Treasury debt240,745 — — — 240,745 
Corporate debt— 203,454 — — 203,454 
Mortgage-backed securities— 155,574 — — 155,574 
Municipal bonds— 72,189 — — 72,189 
Other fixed income— 10,265 — — 10,265 
Subtotal nuclear decommissioning trust286,009 441,482 — 567,266 1,294,757 
Other special use funds:
Equity securities47,570 — — 936 (b)48,506 
U.S. Treasury debt298,170 — — — 298,170 
Municipal bonds— 11,734 — — 11,734 
Subtotal other special use funds345,740 11,734 — 936 358,410 
Total assets$631,749 $568,295 $— $563,512 $1,763,556 
LIABILITIES
Risk management activities — derivative instruments:
Commodity contracts$— (4,740)(2,738)3,105 (a)(4,373)

Level 1
Level 2
Level 3
Other


Total
Assets















Cash equivalents$1,200

$

$

$



$1,200
Risk management activities — derivative instruments:















Commodity contracts

3,140

2

(2,029)
(a)
1,113
Nuclear decommissioning trust:










Equity securities5,203





2,148

(b)
7,351
U.S. commingled equity funds





396,805

(c)
396,805
U.S. Treasury debt148,173









148,173
Corporate debt

96,656







96,656
Mortgage-backed securities

113,115







113,115
Municipal bonds

79,073







79,073
Other fixed income

9,961







9,961
Subtotal nuclear decommissioning trust153,376

298,805



398,953



851,134












Other special use funds:










Equity securities45,130





593

(b)
45,723
U.S. Treasury debt173,310









173,310
Municipal bonds

17,068







17,068
Subtotal other special use funds218,440

17,068



593



236,101

















Total assets$373,016

$319,013

$2

$397,517



$1,089,548
Liabilities










Risk management activities — derivative instruments:















Commodity contracts$

$(52,696)
$(8,216)
$875

(a)
$(60,037)
            
(a)Represents counterparty netting, margin, and collateral. See Note 15.
(a)Represents counterparty netting, margin, and collateral. See Note 17.
(b)Represents net pending securities sales and purchases.
(c)Valued using NAV as a practical expedient and, therefore, are not classified in the fair value hierarchy.
(b)Represents net pending securities sales and purchases.
(c)Valued using NAV as a practical expedient and, therefore, are not classified in the fair value hierarchy.
 
Fair Value Measurements Classified as Level 3
 
The significant unobservable inputs used in the fair value measurement of our energy derivative contracts include broker quotes that cannot be validated as an observable input primarily due to the long-term nature of the quote.quote or other characteristics of the product.  Significant changes in these inputs in isolation would result in significantly higher or lower fair value measurements.  Changes in our derivative contract fair values, including changes relating to unobservable inputs, typically will not impact net income due to regulatory accounting treatment (seetreatment. See Note 4).3.
 
181


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Because our forward commodity contracts classified as Level 3 are currently in a net purchase position, we would expect price increases of the underlying commodity to result in increases in the net fair value of the

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


related contracts.  Conversely, if the price of the underlying commodity decreases, the net fair value of the related contracts would likely decrease.

Other unobservable valuation inputs include credit and liquidity reserves which do not have a material impact on our valuations; however, significant changes in these inputs could also result in higher or lower fair value measurements.

The following tables provide information regarding our significant unobservable inputs used to value our risk management derivative Level 3 instruments at December 31, 20192022 and December 31, 2018:2021:

December 31, 2022
 Fair Value (thousands)
ValuationSignificantWeighted-Average
Commodity ContractsAssetsLiabilitiesTechniqueUnobservable InputRange (b)
Electricity:
Forward Contracts (a)$26,132 $1,759 Discounted cash flowsElectricity forward price (per MWh)$37.79-$310.69$163.92 
Natural Gas:
Forward Contracts (a)— 29,261 Discounted cash flowsNatural gas forward price (per MMBtu)$(11.81)-$0.00$(5.08)
Total$26,132 $31,020 
(a)Includes swaps and physical and financial contracts.
(b)Unobservable inputs were weighted by the relative fair value of the instrument.

 
December 31, 2021
 Fair Value (thousands)
ValuationSignificantWeighted-Average
Commodity ContractsAssetsLiabilitiesTechniqueUnobservable InputRange(b)
Natural Gas:
Forward Contracts (a)$— $2,738 Discounted cash flowsNatural gas forward price (per MMBtu)$(0.76)- $(0.65)$(0.71)
Total$— $2,738 
 December 31, 2019
Fair Value (thousands)
 Valuation Technique Significant Unobservable Input Range Weighted-Average
Commodity ContractsAssets Liabilities 
Electricity: 
  
        
Forward Contracts (a)$33
 $819
 Discounted cash flows Electricity forward price (per MWh) $22.18 - $22.18 $22.18
Natural Gas: 
  
        
Forward Contracts (a)
 2,610
 Discounted cash flows Natural gas forward price (per MMBtu) $2.33 -$ 2.78 $2.49
Total$33
 $3,429
        
(a)Includes swaps and physical and financial contracts.
(a)Includes swaps and physical and financial contracts.
(b)Unobservable inputs were weighted by the relative fair value of the instrument.

182

 December 31, 2018
Fair Value (thousands)
 Valuation Technique Significant Unobservable Input Range Weighted-Average
Commodity ContractsAssets Liabilities 
Electricity: 
  
        
Forward Contracts (a)$
 $2,456
 Discounted cash flows Electricity forward price (per MWh) $17.88 - $37.03 $26.10
Natural Gas: 
  
        
Forward Contracts (a)2
 5,760
 Discounted cash flows Natural gas forward price (per MMBtu) $1.79 - $2.92 $2.48
Total$2
 $8,216
        
(a)Includes swaps and physical and financial contracts.


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


The following table shows the changes in fair value for our risk management activities'activities’ assets and liabilities that are measured at fair value on a recurring basis using Level 3 inputs for the years ended December 31, 20192022 and 20182021 (dollars in thousands):
 Year Ended
December 31,
Commodity Contracts20222021
Net derivative balance at beginning of period$(2,738)$(1,102)
Total net gains (losses) realized/unrealized:
Deferred as a regulatory asset or liability(374)13,827 
Settlements(1,123)(15,463)
Transfers into Level 3 from Level 2(846)— 
Transfers from Level 3 into Level 2193 — 
Net derivative balance at end of period$(4,888)$(2,738)
Net unrealized gains included in earnings related to instruments still held at end of period$— $— 
  
Year Ended
December 31,
Commodity Contracts 2019 2018
Net derivative balance at beginning of period $(8,214) $(18,256)
Total net gains (losses) realized/unrealized:  
  
Included in earnings 
 
Included in OCI 
 
Deferred as a regulatory asset or liability (13,457) (1,130)
Settlements 12,250
 (787)
Transfers into Level 3 from Level 2 (6,512) (12,830)
Transfers from Level 3 into Level 2 12,537
 24,789
Net derivative balance at end of period $(3,396) $(8,214)
Net unrealized gains included in earnings related to instruments still held at end of period $
 $

Transfers between levels in the fair value hierarchy shown in the table above reflect the fair market value at the beginning of the period and are triggered by a change in the lowest significant input as of the end of the period.  We had 0 significant Level 1 transfers to or from any other hierarchy level.  Transfers in or out of Level 3 are typically related to our long-datedlong dated energy transactions that extend beyond available quoted periods.

Financial Instruments Not Carried at Fair Value
 
The carrying value of our short-term borrowings approximate fair value and are classified within Level 2 of the fair value hierarchy.  See Note 76 for our long-term debt fair values. The NTEC note receivable related to the sale of 4CA’s interest in Four Corners bears interest at 3.9% per annum and has a book value of $44.3 million as

Nonrecurring Fair Value Measurements

As of December 31, 2019, as presented on the Consolidated Balance Sheets.  The carrying amount is not materially different from2022, the fair value of the note receivable andBCE’s impaired equity method investment that is classified within Level 3 of themeasured at fair value hierarchy.on a nonrecurring basis was zero, which was valued using significant unobservable inputs (Level 3). The total tax effected impairment charge included in net income for the year ended December 31, 2022 was $12.8 million. See Note 1110 for more information on 4CA matters.



COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


additional information.
15.
13.    Earnings Per Share

The following table presents the calculation of Pinnacle West’s basic and diluted earnings per share for continuing operations attributable to common shareholders for the years ended December 31, 2019, 2018 and 2017 (in thousands, except per share amounts):
 202220212020
Net income attributable to common shareholders$483,602 $618,720 $550,559 
Weighted average common shares outstanding — basic113,196 112,910 112,666 
Net effect of dilutive securities:   
Contingently issuable performance shares and restricted stock units220 282 276 
Weighted average common shares outstanding — diluted113,416 113,192 112,942 
Earnings per weighted-average common share outstanding
Net income attributable to common shareholders — basic$4.27 $5.48 $4.89 
Net income attributable to common shareholders — diluted$4.26 $5.47 $4.87 
 2019 2018 2017
Net income attributable to common shareholders$538,320
 $511,047
 $488,456
Weighted average common shares outstanding — basic112,443
 112,129
 111,839
Net effect of dilutive securities: 
  
  
Contingently issuable performance shares and restricted stock units315
 421
 528
Weighted average common shares outstanding — diluted112,758
 112,550
 112,367
Earnings per weighted-average common share outstanding     
Net income attributable to common shareholders - basic$4.79
 $4.56
 $4.37
Net income attributable to common shareholders - diluted$4.77
 $4.54
 $4.35


183

16.
COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

14.    Stock-Based Compensation
 
Pinnacle West has incentive compensation plans under which stock-based compensation is granted to officers, key-employees, and non-officer members of the Board of Directors. Awards granted under the 20122021 Long-Term Incentive Plan (“20122021 Plan”) may be in the form of stock grants, restricted stock units, stock units, performance shares, restricted stock, dividend equivalents, performance share units, performance cash, incentive and non-qualified stock options, and stock appreciation rights.  The 20122021 Plan authorizes up to 4.61.3 million common shares to be available for grant.  As of December 31, 2019, 1.62022, 0.9 million common shares were available for issuance under the 20122021 Plan. During 2019, 2018,2022, 2021, and 2017,2020, the Company granted awards in the form of restricted stock units, stock units, stock grants, and performance shares. Awards granted from 2012 to May 2021 were issued under the 2012 Long-Term Incentive Plan (“2012 Plan”), and awards granted from 2007 to 2011 were issued under the 2007 Long-Term Incentive Plan (“2007 Plan”), and no. No new awards may be granted under the 2012 or 2007 Plan.Plans.

Stock-Based Compensation Expense and Activity
 
Compensation cost included in net income for stock-based compensation plans was $16 million in 2022, $18 million in 2019, $202021, and $18 million in 2018, and $21 million in 2017.2020.  The compensation cost capitalized is immaterial for all years. Income tax benefits related to stock-based compensation arrangements were $7$2 million in 2019, $72022, $3 million in 2018,2021, and $15$4 million in 2017.2020.

As of December 31, 2019,2022, there were approximately $9$20 million of unrecognized compensation costs related to nonvested stock-based compensation arrangements. We expect to recognize these costs over a weighted-average period of 2two years. 

The total fair value of shares vested was $21$25 million in 2019, $242022, $22 million in 20182021 and $22 million in 2017.2020.
 

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


The following table is a summary of awards granted and the weighted-average grant date fair value for each of the last three years ended 2019, 2018years:
Restricted Stock Units, Stock Grants, and Stock Units (a)Performance Shares (b)
 202220212020202220212020
Units granted174,791 152,345 118,403 208,736 161,840 122,830 
Weighted-average grant date fair value$69.66 $76.72 $71.70 $77.63 $82.42 $104.74 
(a)Units granted includes awards that will be cash settled of 0 in 2022, 51,074 in 2021, and 2017:45,646 in 2020. See below for additional information on restricted stock unit grants.

(b)Reflects the target payout level.
184

 Restricted Stock Units, Stock Grants, and Stock Units (a) Performance Shares (b)
 2019 2018 2017 2019 2018 2017
Units granted109,106
 132,997
 161,963
 142,874
 171,708
 147,706
Weighted-average grant date fair value$89.15
 $77.51
 $72.60
 $92.16
 $76.56
 $78.99
(a)Units granted includes awards that will be cash settled of 48,972 in 2019, 66,252 in 2018, and 67,599 in 2017.
(b)Reflects the target payout level.

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

The following table is a summaryshows the change of the statusnonvested awards:

Restricted Stock Units, Stock Grants, and Stock UnitsPerformance Shares
SharesWeighted-Average
Grant Date
Fair Value
Shares (b)Weighted-Average
Grant Date
Fair Value
Nonvested at December 31, 2021253,156 $79.37 280,682 $92.16 
Granted174,791 69.66 208,736 77.63 
Vested(101,216)84.52 (136,034)103.30 
Forfeited (c)(9,144)76.56 (22,690)78.29 
Nonvested at December 31, 2022317,587 (a)73.91 330,694 78.91 
Vested Awards Outstanding at December 31, 202278,912 136,034 
(a)Includes 69,413 of non-vested awards that will be cash settled.
(b)The nonvested performance shares are reflected at target payout level. 
(c)We account for forfeitures as of December 31, 2019 and changes during the year:they occur.

 Restricted Stock Units, Stock Grants, and Stock Units Performance Shares
 Shares 
Weighted-Average
Grant Date
Fair Value
 Shares (b) 
Weighted-Average
Grant Date
Fair Value
Nonvested at January 1, 2019270,991
 $74.39
 312,384
 $77.67
Granted109,106
 89.15
 142,874
 92.16
Vested(132,102) 73.48
 (139,214) 78.99
Forfeited (c)(5,383) 80.10
 (9,074) 81.03
Nonvested at December 31, 2019242,612
(a)81.38
 306,970
 83.65
Vested Awards Outstanding at December 31, 201967,148
 


 139,214
 


(a)Includes 141,621 of awards that will be cash settled.
(b)The nonvested performance shares are reflected at target payout level. 
(c)We account for forfeitures as they occur.

Share-based liabilities paid relating to restricted stock units were $5$3 million, $4 million, and $4$6 million in 2019, 20182022, 2021 and 2017,2020, respectively. This includes cash used to settle restricted stock units of $5$3 million, $5$3 million, and $4 million in 2019, 20182022, 2021 and 2017,2020, respectively. Restricted stock units that are cash settled are classified as liability awards. All performance shares are classified as equity awards.
 
Restricted Stock Units, Stock Grants, and Stock Units
 
Restricted stock units are granted to officers and key employees.  Restricted stock unitsemployees and typically vest and settle in equal annual installments over a 4-year period after the grant date.  Vesting is typically dependent upon continuous service during the vesting period; however,period.

Beginning in 2022, restricted stock unit awards are issued in stock. Awards include a dividend equivalent feature that allows each award to accrue dividends and treat them as reinvested, from the date of grant until the applicable vesting date. If the award is forfeited the employee is not entitled to the accrued reinvested dividends on those shares. Awards granted to retirement-eligible employees will vest on a pro-rata basis upon the employee'semployee’s retirement. Awardees elect

Prior to 2022, awardees typically elected to receive payment in either 100% stock, 100% cash, or 50% in cash and 50% in stock.  Restricted stock unit awards typically includeAwards included a dividend equivalent feature. This feature allows each award to accruethat accrued dividend rights equal tofrom the dividends they would have received had they directly owneddate of grant until the stock. Interest on dividend rights compoundsapplicable vesting date, plus interest compounded quarterly. If the award iswas forfeited the employee iswas not entitled to the accrued dividends on those shares. Awards granted to retirement-eligible employees typically vested upon the employee’s retirement.

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


In December 2012, the Company granted a retention award of 50,617 performance-linked restricted stock units to the Chairman of the Board and Chief Executive Officer of Pinnacle West.  This award vested on December 31, 2016, because he remained employed with the Company through that date.  The Board did increase the number of awards that vested by 33,745 restricted stock units, payable in stock because certain performance requirements were met. In February 2017, 84,362 restricted stock units were released.

Compensation cost for restricted stock unit awards is based on the fair value of the award, with the fair value being the market price of our stock on the measurement date. Restricted stock unit awards that will be settled in cash are accounted for as liability awards, with compensation cost initially calculated on the date of grant using the Company’s closing stock price and remeasured at each balance sheet date.
185


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Restricted stock unit awards that will be settled in shares are accounted for as equity awards, with compensation cost calculated using the Company'sCompany’s closing stock price on the date of grant. Compensation cost is recognized over the requisite service period based on the fair value of the award.
 
Stock grants are issued to non-officer members of the Board of Directors. They may elect to receive the stock grant, or to defer receipt until a later date and receive stock units in lieu of the stock grant.  The members of the Board of Directors who elect to defer may elect to receive payment in either 100% stock, 100% cash, or 50% in cash and 50% in stock.  Each stock unit is convertible to one share of stock. The stock units accrueinclude a dividend equivalent feature that accrues dividend rights equal to the amount of dividends the Directors would have received had they directly owned stock equal to the number of vested restricted stock units or stock units from the date of grant to the date of payment, plus interest compounded quarterly.  The dividends and interest are paid, based on the Director’s election, in either stock, cash, or 50% in cash and 50% in stock.
 
Performance Share Awards
 
Performance share awards are granted to officers and key employees.  The awards contain 2 separate performance metric criteria that affect the number of shares that may be received if, after the end of a 3-year performance period, the performance criteria are met. For

Beginning in 2022, performance share awards contain three separate, unrelated performance criteria.The first performance criteria is based upon Pinnacle West’s total shareholder return (“TSR”) in relation to the firstTSR of other companies in a specified utility index (i.e., the TSR component).The second performance criteria is based upon Pinnacle West’s earnings per share (“EPS”) performance relative to an approved target (i.e., the EPS component).The third performance criteria is based upon APS’s clean MW installed of renewable or other carbon free resources compared to the approved target (i.e., the Clean component).The exact number of shares issued is calculated separately for each performance component and can vary from 0% to 200% of the target award for each separate performance criteria. Shares received include a dividend equivalent feature that treats accrued dividends as reinvested, from the date of grant until the date of payment, equal to the number of shares thatvested performance shares. If the award is forfeited or if the performance criteria are not achieved, the employee is not entitled to the dividends on those shares. Awards granted to retirement-eligible employees will vest ison a pro-rata basis upon the employee’s retirement.

Prior to 2022, performance share awards had two performance criteria. The first performance criteria was based onupon non-financial performance metrics (i.e., the metricMetric component). The othersecond performance criteria iswas based upon Pinnacle West's total shareholder return ("TSR")West’s TSR in relation to the TSR of other companies in a specified utility index (i.e., the TSR component). The exact number of shares issued will vary from 0% to 200% of the target award. Shares received includeincluded a dividend equivalent feature that allows accrued dividend rights paid in stock equal tofrom the amountdate of dividends that recipients would have received had they directly owned stock,grant until the date of payment, plus interest compounded quarterly, equal to the number of vested performance shares from the date of grant to the date of payment plus interest compounded quarterly.shares. If the award iswas forfeited, or if the performance criteria are not achieved, the employee iswas not entitled to the accrued dividends on those shares. Awards granted to retirement-eligible employees typically vested upon the employee’s retirement.
 
Performance share awards are accounted for as equity awards, with compensation cost based on the fair value of the award on the grant date. Compensation cost relating to the metricEPS, Clean and Metric component of the awardrespective awards is based on the Company’s closing stock price on the date of grant, with compensation cost recognized over the requisite service period based on the number of shares expected to vest. Management evaluates the probability of meeting the metricEPS, Clean and Metric component at each balance sheet date. If the metricEPS, Clean and Metric component criteria are not ultimately achieved, no
186


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

compensation cost is recognized relating to the metricEPS, Clean and Metric component, and any previously recognized compensation cost is reversed. Compensation cost relating to the TSR component of the awardrespective awards is determined using a Monte Carlo simulation valuation model, with compensation cost recognized ratably over the requisite service period, regardless of the number of shares that actually vest.


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


17.15.    Derivative Accounting
 
Derivative financial instruments are used to manage exposure to commodity price and transportation costs of electricity, natural gas, coal, emissions allowances, and interest rates.  Risks associated with market volatility are managed by utilizing various physical and financial derivative instruments, including futures, forwards, options, and swaps.  As part of our overall risk management program, we may use derivative instruments to hedge purchases and sales of electricity and fuels.natural gas.  Derivative instruments that meet certain hedge accounting criteria may be designated as cash flow hedges and are used to limit our exposure to cash flow variability on forecasted transactions.  The changes in market value of such instruments have a high correlation to price changes in the hedged transactions.  Derivative instruments are also entered into for economic hedging purposes.  While economic hedges may mitigate exposure to fluctuations in commodity prices, these instruments have not been designated as accounting hedges.  Contracts that have the same terms (quantities, delivery points and delivery periods) and for which power does not flow are netted, which reduces both revenues and fuel and purchased power costs in our Consolidated Statements of Income, but does not impact our financial condition, net income, or cash flows.
  
Our derivative instruments, excluding those qualifying for a scope exception, are recorded on the balance sheet as an asset or liability and are measured at fair value.  See Note 1412 for a discussion of fair value measurements.  Derivative instruments may qualify for the normal purchases and normal sales scope exception if they require physical delivery, and the quantities represent those transacted in the normal course of business.  Derivative instruments qualifying for the normal purchases and sales scope exception are accounted for under the accrual method of accounting and excluded from our derivative instrument discussion and disclosures below.

Energy Derivatives

For its regulated operations, APS defers for future rate treatment 100% of the unrealized gains and losses on energy derivatives pursuant to the PSA mechanism that would otherwise be recognized in income.  Realized gains and losses on energy derivatives are deferred in accordance with the PSA to the extent the amounts are above or below the Base Fuel Rate (seeRate. See Note 4).3.  Gains and losses from energy derivatives in the following tables represent the amounts reflected in income before the effect of PSA deferrals.

As of December 31, 2019 and 2018, we hadThe following table shows the following outstanding gross notional volume of energy derivatives, which represent both purchases and sales (does not reflect net position):
 
 QuantityQuantity
Commodity Unit of MeasureDecember 31, 2019 December 31, 2018CommodityUnit of MeasureDecember 31, 2022December 31, 2021
Power GWh193
 250
PowerGWh1,197 — 
Gas Billion cubic feet257
 218
GasBillion cubic feet149 155 
 

187


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Gains and Losses from Energy Derivative Instruments
 
The following table provides information about APS’s gains and losses from energy derivative instruments in designated cash flow accounting hedging relationships (dollars in thousands):
Financial Statement Year Ended
December 31,
Commodity ContractsLocation202220212020
Loss Reclassified from Accumulated OCI into Income (Effective Portion Realized) (a)Fuel and purchased power (b)$— $— $(763)
(a)During the years ended December 31, 2022, 2021, and 2020, we had no gains or losses reclassified from accumulated OCI to earnings related to discontinued cash flow hedges.
(b)Amounts are before the effect of PSA deferrals.

During the next twelve months, we estimate that no amounts will be reclassified from accumulated OCI into income. For APS, the delivery period for all energy derivative instruments in designated cash flow accounting hedging relationships have lapsed.

The following table provides information about gains and losses from derivative instruments in designated cash flow accounting hedging relationships during the years ended December 31, 2019, 2018 and 2017 (dollars in thousands):
  Financial Statement  
Year Ended
December 31,
Commodity Contracts Location 2019 2018 2017
Loss Recognized in OCI on Derivative Instruments (Effective Portion) OCI — derivative instruments $
 $
 $(59)
Loss Reclassified from Accumulated OCI into Income (Effective Portion Realized) (a) Fuel and purchased power (b) (1,512) (2,000) (3,519)
(a)During the years ended December 31, 2019, 2018, and 2017, we had 0 losses reclassified from accumulated OCI to earnings related to discontinued cash flow hedges.
(b)Amounts are before the effect of PSA deferrals.
During the next twelve months, we estimate that a net loss of $0.8 million before income taxes will be reclassified from accumulated OCI as an offset to the effect of market price changes for the related hedged transactions.  In accordance with the PSA, most of these amounts will be recorded as either a regulatory asset or liability and have no immediate effect on earnings.
The following table provides information about gains and losses fromenergy derivative instruments not designated as accounting hedging instruments during the years ended December 31, 2019, 2018 and 2017 (dollars in thousands):

Financial Statement Year Ended
December 31,
Commodity ContractsLocation202220212020
Net Gain (Loss) Recognized in IncomeFuel and purchased power (a)$307,287 $216,847 $(3,178)
  Financial Statement  
Year Ended
December 31,
Commodity Contracts Location 2019 2018 2017
Net Loss Recognized in Income Operating revenues $
 $(2,557) $(1,192)
Net Loss Recognized in Income Fuel and purchased power (a) (84,953) (12,951) (87,991)
Total   $(84,953) $(15,508) $(89,183)
(a)Amounts are before the effect of PSA deferrals.
(a)Amounts are before the effect of PSA deferrals.

Energy Derivative Instruments in the Consolidated Balance Sheets

Our energy derivative transactions are typically executed under standardized or customized agreements, which include collateral requirements and, in the event of a default, would allow for the netting of positive and negative exposures associated with a single counterparty.  Agreements that allow for the offsetting of positive and negative exposures associated with a single counterparty are considered master netting arrangements.  Transactions with counterparties that have master netting arrangements are offset and reported net on the Consolidated Balance Sheets.  Transactions that do not allow for offsetting of positive and negative positions are reported gross on the Consolidated Balance Sheets.

We do not offset a counterparty'scounterparty’s current energy derivative contracts with the counterparty’s non-current energy derivative contracts, although our master netting arrangements would allow current and non-current positions

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


to be offset in the event of a default.  Additionally, in the event of a default, our master netting arrangements would allow for the offsetting of all transactions executed under the master netting arrangement.  These types of transactions may include non-derivative instruments, derivatives qualifying for scope exceptions, trade receivables and trade payables arising from settled positions, and other forms of non-cash collateral (such as letters of credit).  These types of transactions are excluded from the offsetting tables presented below.
188

As of December 31, 2017, we no longer have derivative instruments that are designated as cash flow hedging instruments.
COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

The following tables provide information about the fair value of ourAPS's risk management activities reported on a gross basis and the impacts of offsetting as of December 31, 2019 and 2018.offsetting.  These amounts relate to commodity contracts and are located in the assets and liabilities from risk management activities lines of ourAPS's Consolidated Balance Sheets.

As of December 31, 2022:
 (dollars in thousands)
Gross 
Recognized 
Derivatives
 (a)
Amounts 
Offset
(b)
Net
 Recognized
 Derivatives
Other
 (c)
Amounts 
Reported on 
Balance Sheets
Current assets$103,484 $(15,808)$87,676 $28 $87,704 
Investments and other assets49,777 (5,383)44,394 — 44,394 
Total assets153,261 (21,191)132,070 28 132,098 
Current liabilities(47,670)15,808 (31,862)(5,835)(37,697)
Deferred credits and other(9,223)5,383 (3,840)— (3,840)
Total liabilities(56,893)21,191 (35,702)(5,835)(41,537)
Total$96,368 $— $96,368 $(5,807)$90,561 
(a)All of our gross recognized derivative instruments were subject to master netting arrangements.
(b)No cash collateral has been provided to counterparties, or received from counterparties, that is subject to offsetting.
(c)Represents cash collateral and cash margin that is not subject to offsetting. Amounts relate to non-derivative instruments, derivatives qualifying for scope exceptions, or collateral and margin posted in excess of the recognized derivative instrument.  Includes cash collateral received from counterparties of $5,835 thousand and cash margin provided to counterparties of $28 thousand.
As of December 31, 2021:
 (dollars in thousands)
Gross
 Recognized
 Derivatives
 (a)
Amounts
Offset 
(b)
Net
 Recognized
 Derivatives
Other
 (c)
Amounts
 Reported on
 Balance Sheets
Current assets$66,777 $(3,346)$63,431 $50 $63,481 
Investments and other assets48,302 (1,394)46,908 — 46,908 
Total assets115,079 (4,740)110,339 50 110,389 
Current liabilities(6,084)3,346 (2,738)(1,635)(4,373)
Deferred credits and other(1,394)1,394 — — — 
Total liabilities(7,478)4,740 (2,738)(1,635)(4,373)
Total$107,601 $— $107,601 $(1,585)$106,016 
(a)All of our gross recognized derivative instruments were subject to master netting arrangements.
(b)No cash collateral has been provided to counterparties, or received from counterparties, that is subject to offsetting.
(c)Represents cash collateral and cash margin that is not subject to offsetting.  Amounts relate to non-derivative instruments, derivatives qualifying for scope exceptions, or collateral and margin posted in excess of the recognized derivative instrument.  Includes cash collateral received from counterparties of $1,635 thousand and cash margin provided to counterparties of $50 thousand.

189

As of December 31, 2019:
(dollars in thousands)
 
Gross 
Recognized 
Derivatives
 (a)
 
Amounts 
Offset
(b)
 
Net
 Recognized
 Derivatives
 
Other
 (c)
 
Amount 
Reported on 
Balance Sheet
Current assets $584
 $(474) $110
 $405
 $515
           
Current liabilities (38,235) 474
 (37,761) (1,185) (38,946)
Deferred credits and other (33,186) 
 (33,186) 
 (33,186)
Total liabilities (71,421) 474
 (70,947) (1,185) (72,132)
Total $(70,837) $
 $(70,837) $(780) $(71,617)
(a)All of our gross recognized derivative instruments were subject to master netting arrangements.
(b)NaN cash collateral has been provided to counterparties, or received from counterparties, that is subject to offsetting.
(c)Represents cash collateral and cash margin that is not subject to offsetting. Amounts relate to non-derivative instruments, derivatives qualifying for scope exceptions, or collateral and margin posted in excess of the recognized derivative instrument.  Includes cash collateral received from counterparties of $1,185 and cash margin provided to counterparties of $405.


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Interest Rate Derivatives

As of December 31, 2018:
(dollars in thousands)
 
Gross
 Recognized
 Derivatives
 (a)
 
Amounts
Offset 
(b)
 
Net
 Recognized
 Derivatives
 
Other
 (c)
 
Amount
 Reported on
 Balance Sheet
Current assets $3,106
 $(2,149) $957
 $156
 $1,113
Investments and other assets 36
 (36) 
 
 
Total assets 3,142
 (2,185) 957
 156
 1,113
           
Current liabilities (36,345) 2,149
 (34,196) (1,310) (35,506)
Deferred credits and other (24,567) 36
 (24,531) 
 (24,531)
Total liabilities (60,912) 2,185
 (58,727) (1,310) (60,037)
Total $(57,770) $
 $(57,770) $(1,154) $(58,924)
On October 19, 2022, Bright Canyon Energy entered into an interest rate swap to hedge the variable interest rate exposure relating to the Los Alamitos credit agreement. The transaction qualifies and has been designated as cash flow hedge. The hedge’s gain or loss is reported as a component of other comprehensive income and subsequently will be reclassified into earnings in the periods during which the related interest expense on the debt is incurred. As of December 31, 2022, the interest rate swap has a notional value of $32 million with a maturity in 2041. Relating to this derivative, our Consolidated Balance Sheet as of December 31, 2022 includes approximately $0.9 million reported within the liabilities from risk management activities line within the deferred credits and other section, and $0.1 million reported within the current assets from risk management activities line. For the year ended December 31, 2022, the Consolidated Income Statement includes a pretax loss of approximately $0.8 million recognized in other comprehensive income relating to the interest rate swap. There were no gains or losses reclassified out of accumulated other comprehensive income for the year ended December 31, 2022, and we expect no significant amounts will be reclassified into earnings over the next 12 months.
(a)All of our gross recognized derivative instruments were subject to master netting arrangements.
(b)NaN cash collateral has been provided to counterparties, or received from counterparties, that is subject to offsetting.
(c)Represents cash collateral and cash margin that is not subject to offsetting.  Amounts relate to non-derivative instruments, derivatives qualifying for scope exceptions, or collateral and margin posted in excess of the recognized derivative instrument.  Includes cash collateral received from counterparties of $1,310 and cash margin provided to counterparties of $156.

Credit Risk and Credit Related Contingent Features
 
We are exposed to losses in the event of nonperformance or nonpayment by energy derivative counterparties and have risk management contracts with many energy derivative counterparties. As of December 31, 2019,2022, we have two counterparties for which our exposure represents approximately 21% of Pinnacle West has no counterparties with positive exposures of greater than 10%West’s $132 million of risk management assets. This exposure relates to master agreements with the counterparties and both are rated as investment grade. Our risk management process assesses and monitors the financial exposure of all counterparties.  Despite the fact that the great majority of our trading counterparties'counterparties’ debt is rated as investment grade by the credit rating agencies, there is still a possibility that one or more of these counterparties could default, resulting in a material impact on consolidated earnings for a given period. Counterparties in the portfolio consist principally of financial institutions, major energy companies, municipalities, and local distribution companies.  We maintain credit policies that we believe minimize overall credit risk to within acceptable limits.  Determination of the credit quality of our counterparties is based upon a number of factors, including credit ratings and our evaluation of their financial condition.  To manage credit risk, we employ collateral requirements and standardized agreements that allow for the netting of positive and negative exposures associated with a single counterparty.  Valuation adjustments are established representing our estimated credit losses on our overall exposure to counterparties.
 
Certain of our energy derivative instrument contracts contain credit-risk-related contingent features including, among other things, investment grade credit rating provisions, credit-related cross-default provisions, and adequate assurance provisions.  Adequate assurance provisions allow a counterparty with reasonable grounds for uncertainty to demand additional collateral based on subjective events and/or conditions.  For those energy derivative instruments in a net liability position, with investment grade credit contingencies, the counterparties could demand additional collateral if our debt credit rating were to fall below investment grade (below BBB- for Standard & Poor’s or Fitch or Baa3 for Moody’s).
 

190


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


The following table provides information about our energy derivative instruments that have credit-risk-related contingent features at December 31, 2019 (dollars in thousands):
 December 31, 2019
Aggregate fair value of derivative instruments in a net liability position$71,116
Cash collateral posted
Additional cash collateral in the event credit-risk related contingent features were fully triggered (a)70,519
(a)This amount is after counterparty netting and includes those contracts which qualify for scope exceptions, which are excluded fromDecember 31, 2022
Aggregate fair value of derivative instruments in a net liability position$56,893 
Cash collateral posted— 
Additional cash collateral in the derivative details above.event credit-risk related contingent features were fully triggered (a)32,884 
(a)This amount is after counterparty netting and includes those contracts which qualify for scope exceptions, which are excluded from the derivative details above.
 
We also have energy related non-derivative instrument contracts with investment grade credit-related contingent features, which could also require us to post additional collateral of approximately $95$76 million if our debt credit ratings were to fall below investment grade.

18.16.    Other Income and Other Expense
 
The following table provides detail of Pinnacle West'sWest’s Consolidated other income and other expense for 2019, 20182022, 2021 and 20172020 (dollars in thousands):
 
 202220212020
Other income:   
Interest income$7,326 $6,726 $12,210 
Investment gains (losses) — net— — 2,358 
Debt return on Four Corners SCR deferral (Note 3)— 14,955 15,865 
Debt return on Ocotillo modernization project (Note 3)— 23,366 26,121 
Miscellaneous590 53 149 
Total other income$7,916 $45,100 $56,703 
Other expense:   
Non-operating costs$(18,619)$(13,008)$(12,400)
Investment gains (losses) — net(20,537)(b)(1,367)— 
Miscellaneous(13,229)(a)(11,021)(45,376)(a)
Total other expense$(52,385)$(25,396)$(57,776)
 2019 2018 2017
Other income: 
  
  
Interest income$10,377
 $8,647
 $3,497
Debt return on Four Corners SCR deferral (Note 4)19,541
 16,153
 354
Debt return on Ocotillo modernization project (Note 4)20,282
 
 
Miscellaneous63
 96
 155
Total other income$50,263
 $24,896
 $4,006
Other expense: 
  
  
Non-operating costs$(10,663) $(10,076) $(11,749)
Investment losses — net(1,835) (417) (4,113)
Miscellaneous(5,382) (7,473) (5,677)
Total other expense$(17,880) $(17,966) $(21,539)
(a)The 2022 miscellaneous amount includes donations of $7 million to the APS Foundation. The 2020 miscellaneous amount includes donations of approximately $10 million to the APS Foundation and approximately $25.2 million related to the CCT plan. See Note 3.

(b)
The 2022 investment loss is primarily related to an impairment write-off of BCE’s Clear Creek wind farm investment. See Note 10.
 


191


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Other Income and Other Expense - APS
 
The following table provides detail of APS’s other income and other expense for 2019, 20182022, 2021 and 20172020 (dollars in thousands):
 
 202220212020
Other income:   
Interest income$5,332 $4,692 $9,621 
Debt return on Four Corners SCR deferral (Note 3)— 14,955 15,865 
Debt return on Ocotillo modernization project (Note 3)— 23,366 26,121 
Miscellaneous556 40 148 
Total other income$5,888 $43,053 $51,755 
Other expense:   
Non-operating costs$(15,579)$(10,080)$(10,659)
Miscellaneous(10,529)(a)(8,817)(43,035)(a)
Total other expense$(26,108)$(18,897)$(53,694)
 2019 2018 2017
Other income: 
  
  
Interest income$6,998
 $6,496
 $2,504
Debt return on Four Corners SCR deferral (Note 4)19,541
 16,153
 354
Debt return on Ocotillo modernization project (Note 4)20,282
 
 
Miscellaneous63
 97
 155
Total other income$46,884
 $22,746
 $3,013
Other expense: 
  
  
Non-operating costs$(9,612) $(9,462) $(10,825)
Miscellaneous(3,378) (5,830) (3,088)
Total other expense$(12,990) $(15,292) $(13,913)
(a)The 2022 miscellaneous amount includes donations of $7 million to the APS Foundation. The 2020 miscellaneous amount includes donations of approximately $10 million to the APS Foundation and approximately $25.2 million related to the CCT plan. See Note 3.



19.17.    Palo Verde Sale Leaseback Variable Interest Entities
 
In 1986, APS entered into agreements with 3three separate VIE lessor trust entities in order to sell and lease back interests in Palo Verde Unit 2 and related common facilities. APS will retain the assets through 2023 under 1 lease and 2033 under the other 2 leases. all three lease agreements. APS will be required to make payments relating to these the three leases in total of approximately $23$21 million annually for the period 2020 through 2023 and about $16 million annually for the period 2024 through 2033. At the end of the lease period, APS will have the option to purchase the leased assets at their fair market value, extend the leases for up to two years, or return the assets to the lessors.
 
The leases'leases’ terms give APS the ability to utilize the assets for a significant portion of the assets'assets’ economic life, and therefore provide APS with the power to direct activities of the VIEs that most significantly impact the VIEs'VIEs’ economic performance. Predominantly due to the lease terms, APS has been deemed the primary beneficiary of these VIEs and therefore consolidates the VIEs.

As a result of consolidation, we eliminate lease accounting and instead recognize depreciation expense, resulting in an increase in net income of $17 million for 2022, $17 million for 2021 and $19 million for 2019, 2018 and 2017.2020. The increase in net income is entirely attributable to the noncontrolling interests.  Income attributable to Pinnacle West shareholders is not impacted by the consolidation.

192


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Our Consolidated Balance Sheets at December 31, 2019 and December 31, 2018 include the following amounts relating to the VIEs (dollars in thousands):
 December 31, 2019 December 31, 2018
Palo Verde sale leaseback property, plant and equipment, net of accumulated depreciation$101,906
 $105,775
Equity-Noncontrolling interests122,540
 125,790

 December 31, 2022December 31, 2021
Palo Verde sale leaseback property, plant and equipment, net of accumulated depreciation$90,296 $94,166 
Equity-Noncontrolling interests111,229 115,260 
 
Assets of the VIEs are restricted and may only be used for payment to the noncontrolling interest holders.  These assets are reported on our consolidated financial statements.


170


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


 
APS is exposed to losses relating to these VIEs upon the occurrence of certain events that APS does not consider to be reasonably likely to occur.  Under certain circumstances (for example, the NRC issuing specified violation orders with respect to Palo Verde or the occurrence of specified nuclear events), APS would be required to make specified payments to the VIEs’ noncontrolling equity participants and take title to the leased Unit 2 interests, which, if appropriate, may be required to be written downwritten-down in value.  If such an event were to occur during the lease periods, APS may be required to pay the noncontrolling equity participants approximately $301$324 million beginning in 2020,2023, and up to $456$501 million over the lease extension term.terms.
 
For regulatory ratemaking purposes, the agreements continue to be treated as operating leases and, as a result, we have recorded a regulatory asset relating to the arrangements.
 
20.18.    Investments in Nuclear Decommissioning Trusts and Other Special Use Funds
 
We have investments in debt and equity securities held in Nuclear Decommissioning Trusts, Coal Reclamation Escrow Accounts,Account, and an Active Union Employee Medical Account. Investments in debt securities are classified as available-for-sale securities. We record both debt and equity security investments at their fair value on our Consolidated Balance Sheets. See Note 1412 for a discussion of how fair value is determined and the classification of the investments within the fair value hierarchy. The investments in each trust or account are restricted for use and are intended to fund specified costs and activities as further described for each fund below.

Nuclear Decommissioning Trusts - ToAPS established external decommissioning trusts in accordance with NRC regulations to fund the future costs APS expects to incur to decommission Palo Verde, APS established external decommissioning trusts in accordance with NRC regulations.Verde.  Third-party investment managers are authorized to buy and sell securities per stated investment guidelines.  The trust funds are invested in fixed income securities and equity securities. Earnings and proceeds from sales and maturities of securities are reinvested in the trusts. Because of the ability of APS to recover decommissioning costs in rates, and in accordance with the regulatory treatment, APS has deferred realized and unrealized gains and losses (including other-than-temporary impairments)credit losses) in other regulatory liabilities.

Coal Reclamation Escrow Account -APS has investments restricted for the future coal mine reclamation funding related to Four Corners. This escrow account is primarily invested in fixed income securities. Earnings and proceeds from sales of securities are reinvested in the escrow account. Because of the ability of APS to recover coal reclamation costs in rates, and in accordance with the regulatory treatment, APS has deferred realized and unrealized gains and losses (including other-than-temporary impairments)credit losses) in other
193


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

regulatory liabilities. Activities relating to APS coal mine reclamation escrow account investments are included within the other special use funds in the table below.


Active Union Employee Medical Account -APS has investments restricted for paying active union employee medical costs. These investments were transferred from APS other postretirement benefit trust assets into the active union employee medical trust in January 2018. These investments may be used to pay active union employee medical costs incurred in the current and future periods. In August 2019, the Company2022 and 2021, APS was reimbursed $15 million for each year, for prior year active union employee medical claims from the active union employee medical account. The account is invested primarily in fixed income securities. In accordance with the ratemaking treatment, APS has deferred the unrealized gains and losses (including other-than-temporary impairments)credit losses) in other regulatory liabilities. Activities relating to active union employee medical account investments are included within the other special use funds in the tablestable below.


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


APS

The following tables present the unrealized gains and losses based on the original cost of the investment and summarizes the fair value of APS'sAPS’s nuclear decommissioning trusttrusts and other special use fund assets at December 31, 2019 and December 31, 2018 (dollars in thousands): 
December 31, 2022
 Fair ValueTotal
Unrealized
Gains
Total
Unrealized
Losses
Investment Type:Nuclear Decommissioning TrustsOther Special Use FundsTotal
Equity securities$487,240 $66,974 $554,214 $334,817 $(267)
Available for sale-fixed income securities582,343 279,294 861,637 (a)3,177 (68,795)
Other3,827 963 4,790 (b)— (29)
Total$1,073,410 $347,231 $1,420,641 $337,994 $(69,091)

December 31, 2019
 Fair Value
Total
Unrealized
Gains

Total
Unrealized
Losses
Investment Type:Nuclear Decommissioning Trusts
Other Special Use Funds
Total

Equity Securities$529,716

$7,142

$536,858

$337,681

$
Available for Sale-Fixed Income Securities478,658

237,479

716,137
(a)25,795

(669)
Other2,401

474

2,875
(b)


Total$1,010,775

$245,095

$1,255,870

$363,476

$(669)
(a)As of December 31, 2022, the amortized cost basis of these available-for-sale investments is $927 million.
(a)As of December 31, 2019, the amortized cost basis of these available-for-sale investments is $691 million.
(b)Represents net pending securities sales and purchases.
(b)Represents net pending securities sales and purchases.

December 31, 2021
 Fair ValueTotal
Unrealized
Gains
Total
Unrealized
Losses
Investment Type:Nuclear Decommissioning TrustsOther Special Use FundsTotal
Equity securities$640,312 $47,570 $687,882 $451,387 $— 
Available for sale-fixed income securities682,227 309,904 992,131 (a)24,283 (4,063)
Other(27,782)936 (26,846)(b)— — 
Total$1,294,757 $358,410 $1,653,167 $475,670 $(4,063)
(a)As of December 31, 2021, the amortized cost basis of these available-for-sale investments is $972 million.
(b)Represents net pending securities sales and purchases.

194


December 31, 2018
 Fair Value
Total
Unrealized
Gains

Total
Unrealized
Losses
Investment Type:Nuclear Decommissioning Trusts
Other Special Use Funds
Total

Equity Securities$402,008

$45,130

$447,138

$222,147

$(459)
Available for Sale-Fixed Income Securities446,978

190,378

637,356
(a)8,634

(6,778)
Other2,148

593

2,741
(b)


Total$851,134

$236,101

$1,087,235

$230,781

$(7,237)
(a)As of December 31, 2018, the amortized cost basis of these available-for-sale investments is $635 million.
(b)Represents net pending securities sales and purchases.


COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


The following table sets forth APS'sAPS’s realized gains and losses relating to the sale and maturity of available-for-sale debt securities and equity securities, and the proceeds from the sale and maturity of these investment securities for the years ended December 31, 2019, 2018 and 2017 (dollars in thousands):
 Year Ended December 31,
 Nuclear Decommissioning TrustsOther Special Use FundsTotal
2022
Realized gains$9,017 $420 $9,437 
Realized losses(40,239)— (40,239)
Proceeds from the sale of securities (a)979,639 227,558 1,207,197 
2021
Realized gains134,610 49 134,659 
Realized losses(8,431)(7)(8,438)
Proceeds from the sale of securities (a)1,457,305 263,661 1,720,966 
2020
Realized gains12,194 176 12,370 
Realized losses(5,553)(15)(5,568)
Proceeds from the sale of securities (a)675,035 144,484 819,519 
(a)Proceeds are reinvested in the nuclear decommissioning trusts and other special use funds, excluding amounts reimbursed to the Company for active union employee medical claims from the active union employee medical account.
 Year Ended December 31,
 Nuclear Decommissioning Trusts
Other Special Use Funds
Total
2019







Realized gains$11,024

$108

$11,132
Realized losses(6,972)


(6,972)
Proceeds from the sale of securities (a)473,806

245,228

719,034
2018







Realized gains6,679

1

6,680
Realized losses(13,552)


(13,552)
Proceeds from the sale of securities (a)554,385

98,648

653,033
2017







Realized gains21,813

17

21,830
Realized losses(13,146)
(9)
(13,155)
Proceeds from the sale of securities (a)542,246

4,093

546,339
(a)Proceeds are reinvested in the nuclear decommissioning trusts or other special use funds, excluding amounts reimbursed to the Company for active union employee medical claims from the active union trust.
    
Fixed Income Securities Contractual Maturities

The fair value of APS’s fixed income securities, summarized by contractual maturities, at December 31, 20192022, is as follows (dollars in thousands):
 
 Nuclear Decommissioning TrustsCoal Reclamation Escrow AccountActive Union Employee Medical AccountTotal
Less than one year$9,422 $49,917 $38,157 $97,496 
1 year – 5 years181,640 36,484 143,878 362,002 
5 years – 10 years122,340 — 6,831 129,171 
Greater than 10 years268,941 4,027 — 272,968 
Total$582,343 $90,428 $188,866 $861,637 
 Nuclear Decommissioning Trusts
Coal Reclamation Escrow Account
Active Union Medical Trust
Total
Less than one year$26,984

$31,953

$40,449

$99,386
1 year – 5 years136,139

25,229

138,042

299,410
5 years – 10 years105,797





105,797
Greater than 10 years209,738

1,806



211,544
Total$478,658

$58,988

$178,491

$716,137


195



COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS



21.19.    Changes in Accumulated Other Comprehensive Loss
 
The following table shows the changes in Pinnacle West'sWest’s consolidated accumulated other comprehensive loss, including reclassification adjustments, net of tax, by component for the years ended December 31, 2019 and 2018 (dollars in thousands): 
 Pension and Other Postretirement Benefits Derivative InstrumentsTotal
Balance at December 31, 2020$(60,725)$(2,071)$(62,796)
OCI (loss) before reclassifications2,439 1,077 3,516 
Amounts reclassified from accumulated other comprehensive loss4,401 (a)18 (b)4,419 
Balance at December 31, 2021(53,885)(976)(54,861)
OCI (loss) before reclassifications17,550 1,873 19,423 
Amounts reclassified from accumulated other comprehensive loss4,003 (a)— 4,003 
Balance at December 31, 2022$(32,332)$897 $(31,435)
  Pension and Other Postretirement Benefits    Derivative Instruments   Total
Balance December 31, 2017$(42,440) 
 $(2,562) 
 $(45,002)
OCI (loss) before reclassifications102
 
 (78) 
 24
Amounts reclassified from accumulated other comprehensive loss4,295
 (a) 1,527
 (b) 5,822
Reclassification of income tax effect related to
tax reform
(7,954)   (598)   (8,552)
Balance December 31, 2018(45,997) 
 (1,711) 
 (47,708)
OCI (loss) before reclassifications(14,041) 
 
 
 (14,041)
Amounts reclassified from accumulated other comprehensive loss3,516
 (a) 1,137
 (b) 4,653
Balance December 31, 2019$(56,522) 
 $(574) 
 $(57,096)
(a)These amounts primarily represent amortization of actuarial loss, and are included in the computation of net periodic pension cost.  See Note 8.
(b)These amounts represent realized gains and losses and are included in the computation of fuel and purchased power costs and are subject to the PSA.  See Note 17.

(a)These amounts primarily represent amortization of actuarial loss and are included in the computation of net periodic pension cost. See Note 7.
(b)These amounts represent realized gains and losses and are included in the computation of fuel and purchased power costs and are subject to the PSA. See Note 15.

Changes in Accumulated Other Comprehensive Loss - APS
 
The following table shows the changes in APS'sAPS’s consolidated accumulated other comprehensive loss, including reclassification adjustments, net of tax, by component for the years ended December 31, 2019 and 2018 (dollars in thousands): 
 Pension and Other Postretirement Benefits Derivative InstrumentsTotal
Balance at December 31, 2020$(40,918)$— $(40,918)
OCI (loss) before reclassifications2,043 (18)2,025 
Amounts reclassified from accumulated other comprehensive loss3,995 (a)18 (b)4,013 
Balance at December 31, 2021(34,880)— (34,880)
OCI (loss) before reclassifications15,646 — 15,646 
Amounts reclassified from accumulated other comprehensive loss3,638 (a)— 3,638 
Balance at December 31, 2022$(15,596)$— $(15,596)
(a)These amounts primarily represent amortization of actuarial loss and are included in the computation of net periodic pension cost. See Note 7.
(b)These amounts represent realized gains and losses and are included in the computation of fuel and purchased power costs and are subject to the PSA. See Note 15.
196
  Pension and Other Postretirement Benefits    Derivative Instruments   Total
Balance December 31, 2017$(24,421) 
 $(2,562) 
 $(26,983)
OCI (loss) before reclassifications(326) 
 (78) 
 (404)
Amounts reclassified from accumulated other comprehensive loss3,791
 (a) 1,527
 (b) 5,318
Reclassification of income tax effect related to
tax reform
(4,440)   (598)   (5,038)
Balance December 31, 2018(25,396) 
 (1,711) 
 (27,107)
OCI (loss) before reclassifications(12,572) 
 
 
 (12,572)
Amounts reclassified from accumulated other comprehensive loss3,020
 (a) 1,137
 (b) 4,157
Balance December 31, 2019$(34,948) 
 $(574) 
 $(35,522)
(a)These amounts primarily represent amortization of actuarial loss, and are included in the computation of net periodic pension cost.  See Note 8.
(b)These amounts represent realized gains and losses and are included in the computation of fuel and purchased power costs and are subject to the PSA.  See Note 17.

PINNACLE WEST CAPITAL CORPORATION HOLDING COMPANY
SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT
CONDENSED STATEMENTS OF COMPREHENSIVE INCOME
(dollars in thousands)
 
 Year Ended December 31,
 2019 2018 2017
Operating revenues$
 $
 $119
Operating expenses12,451
 53,844
 24,591
Operating loss(12,451) (53,844) (24,472)
Other 
  
  
Equity in earnings of subsidiaries562,946
 569,249
 507,495
Other expense(3,957) (3,202) (2,422)
Total558,989
 566,047
 505,073
Interest expense15,069
 12,074
 5,633
Income before income taxes531,469
 500,129
 474,968
Income tax benefit(6,851) (10,918) (13,488)
Net income attributable to common shareholders538,320
 511,047
 488,456
Other comprehensive income (loss) — attributable to common shareholders(9,388) 5,846
 (1,180)
Total comprehensive income — attributable to common shareholders$528,932
 $516,893
 $487,276

 Year Ended December 31,
 202220212020
Operating expenses$8,850 $10,245 $7,901 
Other   
Equity in earnings of subsidiaries500,042 628,916 566,147 
Other expense(4,725)(4,919)(4,586)
Total495,317 623,997 561,561 
Interest expense18,861 10,672 14,021 
Income before income taxes467,606 603,080 539,639 
Income tax benefit(15,996)(15,640)(10,920)
Net income attributable to common shareholders483,602 618,720 550,559 
Other comprehensive income (loss) — attributable to common shareholders23,426 7,935 (5,700)
Total comprehensive income — attributable to common shareholders$507,028 $626,655 $544,859 
 
See Combined Notes to Consolidated Financial Statements.



197

PINNACLE WEST CAPITAL CORPORATION HOLDING COMPANY
SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT
CONDENSED BALANCE SHEETS
(dollars in thousands)
 
 December 31,
 2019 2018
ASSETS 
  
Current assets 
  
Cash and cash equivalents$19
 $41
Accounts receivable104,640
 99,989
Income tax receivable15,905
 32,737
Other current assets401
 1,502
Total current assets120,965
 134,269
Investments and other assets 
  
Investments in subsidiaries6,067,957
 5,859,834
Deferred income taxes40,757
 5,243
Other assets50,139
 34,910
Total investments and other assets6,158,853
 5,899,987
Total Assets$6,279,818
 $6,034,256
LIABILITIES AND EQUITY 
  
Current liabilities 
  
Accounts payable$7,634
 $9,565
Accrued taxes8,573
 9,006
Common dividends payable87,982
 82,675
Short-term borrowings114,675
 76,400
Current maturities of long-term debt450,000
 
Operating lease liabilities81
 
Other current liabilities15,126
 19,215
Total current liabilities684,071
 196,861
    
Long-term debt less current maturities (Note 7)(575) 448,796
    
Pension liabilities17,942
 17,766
Operating lease liabilities1,780
 
Other23,412
 22,128
Total deferred credits and other43,134
 39,894
COMMITMENTS AND CONTINGENCIES (SEE NOTES)


 


Common stock equity   
Common stock2,650,134
 2,629,440
Accumulated other comprehensive loss(57,096) (47,708)
Retained earnings2,837,610
 2,641,183
Total Pinnacle West Shareholders’ equity5,430,648
 5,222,915
Noncontrolling interests122,540
 125,790
Total Equity5,553,188
 5,348,705
Total Liabilities and Equity$6,279,818
 $6,034,256

 December 31,
 20222021
ASSETS  
Current assets  
Cash and cash equivalents$— $594 
Accounts receivable132,061 125,457 
Income tax receivable14,494 1,498 
Other current assets288 13 
Total current assets146,843 127,562 
Investments and other assets  
Investments in subsidiaries7,105,789 6,797,528 
Deferred income taxes1,521 19,520 
Other assets23,153 57,608 
Total investments and other assets7,130,463 6,874,656 
TOTAL ASSETS$7,277,306 $7,002,218 
  
LIABILITIES AND EQUITY
Current liabilities  
Accounts payable$6,499 $3,071 
Accrued taxes7,694 19,855 
Common dividends payable97,895 95,988 
Short-term borrowings15,720 13,300 
Current maturities of long-term debt— 150,000 
Operating lease liabilities117 107 
Other current liabilities14,637 14,684 
Total current liabilities142,562 297,005 
Long-term debt less current maturities (Note 6)947,892 647,139 
Pension liabilities8,218 14,537 
Operating lease liabilities1,459 1,576 
Other17,299 20,501 
Total deferred credits and other26,976 36,614 
COMMITMENTS AND CONTINGENCIES (SEE NOTES)
Common stock equity
Common stock2,719,735 2,696,342 
Accumulated other comprehensive loss(31,435)(54,861)
Retained earnings3,360,347 3,264,719 
Total Pinnacle West Shareholders’ equity6,048,647 5,906,200 
Noncontrolling interests111,229 115,260 
Total Equity6,159,876 6,021,460 
TOTAL LIABILITIES AND EQUITY$7,277,306 $7,002,218 
See Combined Notes to Consolidated Financial Statements.

198


PINNACLE WEST CAPITAL CORPORATION HOLDING COMPANY
SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT
CONDENSED STATEMENTS OF CASH FLOWS
(dollars in thousands)
 Year Ended December 31,
 2019 2018 2017
Cash flows from operating activities 
  
  
Net income$538,320
 $511,047
 $488,456
Adjustments to reconcile net income to net cash provided by operating activities:     
Equity in earnings of subsidiaries — net(562,946) (569,249) (507,495)
Depreciation and amortization76
 76
 76
Deferred income taxes(35,831) 49,535
 (264)
Accounts receivable182
 (7,881) (2,106)
Accounts payable(2,129) 1,967
 (11,162)
Accrued taxes and income tax receivables — net16,400
 (13,535) (22,247)
Dividends received from subsidiaries336,300
 316,000
 296,800
Other(1,300) 31,807
 15,092
Net cash flow provided by operating activities289,072
 319,767
 257,150
Cash flows from investing activities 
  
  
Investments in subsidiaries1,557
 (142,796) (178,027)
Repayments of loans from subsidiaries4,190
 6,477
 2,987
Advances of loans to subsidiaries(4,165) (500) (6,388)
Net cash flow provided by (used for) investing activities1,582
 (136,819) (181,428)
Cash flows from financing activities 
  
  
Issuance of long-term debt
 150,000
 298,761
Short-term debt borrowings under revolving credit facility49,000
 20,000
 58,000
Short-term debt repayments under revolving credit facility(65,000) (32,000) (32,000)
Commercial paper - net54,275
 (7,000) 27,700
Dividends paid on common stock(329,643) (308,892) (289,793)
Repayment of long-term debt
 
 (125,000)
Common stock equity issuance - net of purchases692
 (5,055) (13,390)
Other
 (1) 
Net cash flow used for financing activities(290,676) (182,948) (75,722)
Net decrease in cash and cash equivalents(22) 
 
Cash and cash equivalents at beginning of year41
 41
 41
Cash and cash equivalents at end of year$19
 $41
 $41

 Year Ended December 31,
 202220212020
Cash flows from operating activities   
Net income$483,602 $618,720 $550,559 
Adjustments to reconcile net income to net cash provided by operating activities: 
Equity in earnings of subsidiaries — net(500,042)(628,916)(566,147)
Depreciation and amortization76 93 76 
Deferred income taxes17,256 (11,381)33,007 
Accounts receivable(8,535)8,897 (7,903)
Accounts payable3,431 (2,598)(1,964)
Accrued taxes and income tax receivables — net(25,157)16,079 9,610 
Dividends received from subsidiaries385,800 376,500 357,500 
Other47,719 4,214 20,163 
Net cash flow provided by operating activities404,150 381,608 394,901 
Cash flows from investing activities   
Investments in subsidiaries(186,630)(145,266)(137,881)
Repayments of loans from subsidiaries14,308 4,017 932 
Advances of loans to subsidiaries(3,308)(12,256)(7,261)
Net cash flow used for investing activities(175,630)(153,505)(144,210)
Cash flows from financing activities   
Issuance of long-term debt300,000 300,000 496,950 
Short-term debt borrowings under revolving credit facility— — 211,690 
Short-term debt repayments under revolving credit facility— (19,000)(230,690)
Short-term borrowings and (repayments) — net2,420 (136,700)73,325 
Dividends paid on common stock(378,881)(369,478)(350,577)
Repayment of long-term debt(150,000)— (450,000)
Common stock equity issuance and purchases — net(2,653)(2,350)(1,389)
Net cash flow used for financing activities(229,114)(227,528)(250,691)
Net decrease in cash and cash equivalents(594)575 — 
Cash and cash equivalents at beginning of year594 19 19 
Cash and cash equivalents at end of year$— $594 $19 
     
See Combined Notes to Consolidated Financial Statements.

199

PINNACLE WEST CAPITAL CORPORATION HOLDING COMPANY
NOTES TO FINANCIAL STATEMENTS OF HOLDING COMPANY

The Combined Notes to Consolidated Financial Statements in Part II, Item 8 should be read in conjunction with the Pinnacle West Capital Corporation Holding Company Financial Statements.

The Pinnacle West Capital Corporation Holding Company Financial Statements have been prepared to present the financial position, results of operations and cash flows of Pinnacle West Capital Corporation on a stand-alone basis as a holding company. Investments in subsidiaries are accounted for using the equity method.

200
PINNACLE WEST CAPITAL CORPORATION
SCHEDULE II — RESERVE FOR UNCOLLECTIBLES
(dollars in thousands)

Column A Column B Column C Column D Column E
    Additions    
Description 
Balance at
beginning
of period
 
Charged to
cost and
expenses
 
Charged
to other
accounts
 Deductions 
Balance
at end of
period
Reserve for uncollectibles:  
  
  
  
  
2019 $4,069
 $11,819
 $
 $7,717
 $8,171
2018 2,513
 10,870
 
 9,314
 4,069
2017 3,037
 6,836
 
 7,360
 2,513

Table of Contents


ARIZONA PUBLIC SERVICE COMPANY
SCHEDULE II — RESERVE FOR UNCOLLECTIBLES
(dollars in thousands)
Column A Column B Column C Column D Column E
    Additions    
Description 
Balance at
beginning
of period
 
Charged to
cost and
expenses
 
Charged
to other
accounts
 Deductions 
Balance
at end of
period
Reserve for uncollectibles:  
  
  
  
  
2019 $4,069
 $11,819
 $
 $7,717
 $8,171
2018 2,513
 10,870
 
 9,314
 4,069
2017 3,037
 6,836
 
 7,360
 2,513



ITEM 9.  CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS
ON ACCOUNTING AND FINANCIAL DISCLOSURE
 
None. 
ITEM 9A.  CONTROLS AND PROCEDURES
 
(a)Disclosure Controls and Procedures
 
The term “disclosure controls and procedures” means controls and other procedures of a company that are designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Securities Exchange Act of 1934 (the “Exchange Act”) (15 U.S.C. 78a et seq.) is recorded, processed, summarized, and reported, within the time periods specified in the SEC’s rules and forms.  Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to a company’s management, including its principal executive and principal financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure.
 
Pinnacle West’s management, with the participation of Pinnacle West’s Chief Executive Officer and Chief Financial Officer, have evaluated the effectiveness of Pinnacle West’s disclosure controls and procedures as of December 31, 2019.2022.  Based on that evaluation, Pinnacle West’s Chief Executive Officer and Chief Financial Officer have concluded that, as of that date, Pinnacle West’s disclosure controls and procedures were effective.
 
APS’s management, with the participation of APS’s Chief Executive Officer and Chief Financial Officer, have evaluated the effectiveness of APS’s disclosure controls and procedures as of December 31, 2019.2022.  Based on that evaluation, APS’s Chief Executive Officer and Chief Financial Officer have concluded that, as of that date, APS’s disclosure controls and procedures were effective.
 
(b)Management’s Annual Reports on Internal Control Over Financial Reporting
 
Reference is made to “Management’s Report on Internal Control over Financial Reporting (Pinnacle West Capital Corporation)” in Item 8 of this report and “Management’s Report on Internal Control over Financial Reporting (Arizona Public Service Company)” in Item 8 of this report.
 
(c)Attestation Reports of the Registered Public Accounting Firm
 
Reference is made to “Report of Independent Registered Public Accounting Firm” in Item 8 of this report and “Report of Independent Registered Public Accounting Firm” in Item 8 of this report on the internal control over financial reporting of Pinnacle West Capital Corporation and Arizona Public Service Company,APS, respectively.
 
(d)Changes In Internal Control Over Financial Reporting
 
No change in Pinnacle West’s or APS’s internal control over financial reporting occurred during the fiscal quarter ended December 31, 20192022, that materially affected, or is reasonably likely to materially affect, Pinnacle West’s or APS’s internal control over financial reporting.


201

ITEM 9B.  OTHER INFORMATION

None.

ITEM 9C.  DISCLOSURE REGARDING FOREIGN JURISDICTIONS THAT PREVENT INSPECTIONS

Not applicable.

PART III
 
ITEM 10.  DIRECTORS, EXECUTIVE OFFICERS
AND CORPORATE GOVERNANCE OF PINNACLE WEST

Reference is hereby made to “Information About Our Board and Corporate Governance” and “Proposal 1 — Election of Directors” in the Pinnacle West Proxy Statement relating to the Annual Meeting of Shareholders to be held on May 20, 202017, 2023 (the “2020“2023 Proxy Statement”) and to the “Information about our Executive Officers” section in Part I of this report.
 
Pinnacle West has adopted a Code of Ethics for Financial Executives that applies to financial executives including Pinnacle West’s Chief Executive Officer, Chief Financial Officer, Chief Accounting Officer, Controller, Treasurer, and General Counsel, the President and Chief Operating Officer of APS and other persons designated as financial executives by the Chair of the Audit Committee.  The Code of Ethics for Financial Executives is posted on Pinnacle West’s website (www.pinnaclewest.com).  Pinnacle West intends to satisfy the requirements under Item 5.05 of Form 8-K regarding disclosure of amendments to, or waivers from, provisions of the Code of Ethics for Financial Executives by posting such information on Pinnacle West’s website.
 
ITEM 11.  EXECUTIVE COMPENSATION
 
Reference is hereby made to “Director Compensation,” “Executive Compensation,” and “Human Resources Committee Interlocks and Insider Participation” in the 20202023 Proxy Statement.
 

ITEM 12.  SECURITY OWNERSHIP OF
CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
AND RELATED STOCKHOLDER MATTERS
 
Reference is hereby made to “Ownership of Pinnacle West Stock” in the 20202023 Proxy Statement.

202

Securities Authorized for Issuance Under Equity Compensation Plans
 
The following table sets forth information as of December 31, 20192022, with respect to the the 2021 Plan, 2012 Plan, and the 2007 Plan, under which our equity securities are outstanding or currently authorized for issuance.

Equity Compensation Plan Information 
Plan Category
Number of
securities to be
issued upon
exercise of
outstanding
options, warrants
and rights
 (a)
 
Weighted-
average exercise price
of outstanding
options,
warrants and
rights
 (b)
 
Number of
securities remaining
available for future
issuance under
equity
compensation plans
(excluding
securities reflected
in column (a))
 (c)
Plan Category
Number of
securities to be
issued upon
exercise of
outstanding
options, warrants
and rights
 (a)
Weighted-
average exercise price
of outstanding
options,
warrants and
rights
 (b)
Number of
securities remaining
available for future
issuance under
equity
compensation plans
(excluding
securities reflected
in column (a))
 (c)
Equity compensation plans approved by security holders1,267,062
 
 1,645,994
Equity compensation plans approved by security holders1,340,572 — 864,533 
Equity compensation plans not approved by security holders  
  Equity compensation plans not approved by security holders— — — 
Total1,267,062
 
 1,645,994
Total1,340,572 — 864,533 
 
(a)This amount includes shares subject to outstanding performance share awards and restricted stock unit awards at the maximum amount of shares issuable under such awards.  However, payout of the performance share awards is contingent on the Company reaching certain levels of performance during a three-year performance period.  If the performance criteria for these awards are not fully satisfied, the award recipient will receive less than the maximum number of shares available under these grants and may receive nothing from these grants.
(b)The weighted-average exercise price in this column does not take performance share awards or restricted stock unit awards into account, as those awards have no exercise price.
(c)Awards under the 2012 Plan can take the form of options, stock appreciation rights, restricted stock, performance shares, performance share units, performance cash, stock grants, stock units, dividend equivalents, and restricted stock units.  Additional shares cannot be awarded under the 2007 Plan.  However, if an award under the 2012 Plan is forfeited, terminated or canceled or expires, the shares subject to such award, to the extent of the forfeiture, termination, cancellation or expiration, may be added back to the shares available for issuance under the 2012 Plan.
(a)    This amount includes shares subject to outstanding performance share awards and restricted stock unit awards at the maximum amount of shares issuable under such awards.  However, payout of the performance share awards is contingent on the Company reaching certain levels of performance during a three-year performance period.  If the performance criteria for these awards are not fully satisfied, the award recipient will receive less than the maximum number of shares available under these grants and may receive nothing from these grants.
(b)    The weighted-average exercise price in this column does not take performance share awards or restricted stock unit awards into account, as those awards have no exercise price.
(c)    Awards under the 2021 Plan can take the form of options, stock appreciation rights, restricted stock, performance shares, performance share units, performance cash, stock grants, stock units, dividend equivalents, and restricted stock units.  Additional shares cannot be awarded under the 2012 Plan and the 2007 Plan.  However, if an award under the 2012 Plan or the 2007 Plan is forfeited, terminated or canceled or expires, the shares subject to such award, to the extent of the forfeiture, termination, cancellation, or expiration, may be added back to the shares available for issuance under the 2021 Plan.

Equity Compensation Plans Approved By Security Holders
 
Amounts in column (a) in the table above include shares subject to awards outstanding under twothree equity compensation plans that were previously approved by our shareholders:  (a) the 2007 Plan, which was approved by our shareholders at our 2007 annual meeting of shareholders and under which no new stock awards may be granted; and (b) the 2012 Plan, as amended, which was approved by our shareholders at our 2012 annual meeting of shareholders and the first amendment to the 2012 Plan was approved by our shareholders at our 2017 annual meeting of shareholders and under which no new stock awards may be granted; and (c) the 2021 Plan which was approved by our shareholders at our 2021 annual meeting of shareholders.  See Note 1614 of the Notes to Consolidated Financial Statements for additional information regarding these plans.


203

Equity Compensation Plans Not Approved by Security Holders
 
The Company does not have any equity compensation plans under which shares can be issued that have not been approved by the shareholders.

ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED
TRANSACTIONS, AND DIRECTOR INDEPENDENCE
 
Reference is hereby made to “Information About Our Board and Corporate Governance” and “Related Party Transactions” in the 20202023 Proxy Statement.


ITEM 14.  PRINCIPAL ACCOUNTANT
FEES AND SERVICES
Pinnacle West
 
Reference is hereby made to “Audit Matters — Audit Fees and — Pre-Approval Policies” in the 20202023 Proxy Statement.
 
APS
 
The following fees were paid to APS’s independent registered public accountants, Deloitte & Touche LLP, for the last two fiscal years:
 
Type of Service 2019 2018Type of Service20222021
Audit Fees (1) $2,328,565
 $2,342,455
Audit Fees (1)$2,653,737 $2,580,260 
Audit-Related Fees (2) 322,917
 300,334
Audit-Related Fees (2)498,167 333,905 
 
(1)     The aggregate fees billed for services rendered for the audit of annual financial statements     and for review of financial statements included in Reports on Form 10-Q.10-K and Form 10-Q, respectively.
(2)     The aggregate fees billed for assurance and related services that are reasonably related to the performance of the audit or review of the financial statements and are not included in Audit Fees reported above, which primarily consist of fees for employee benefit plan audits and environmental, social and governance assurance readiness performed in 20192022 and 2018.2021.
 
Pinnacle West’s Audit Committee pre-approves each audit service and non-audit service to be provided by APS’s registered public accounting firm.  The Audit Committee has delegated to the Chair of the Audit Committee the authority to pre-approve audit and non-audit services to be performed by the independent public accountants if the services are not expected to cost more than $50,000.$100,000.  The Chair must report any pre-approval decisions to the Audit Committee at its next scheduled meeting.  All of the services performed by Deloitte & Touche LLP for APS in 20192022 were pre-approved by the Audit Committee or the Chair consistent with the pre-approval policy.


204

PART IV
 

ITEM 15.  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

Financial Statements and Financial Statement Schedules
 
See the Index to Financial Statements and Financial Statement Schedule in Part II, Item 8.
 
Exhibits Filed
 
The documents listed below are being filed or have previously been filed on behalf of Pinnacle West or APS and are incorporated herein by reference from the documents indicated and made a part hereof.  Exhibits not identified as previously filed are filed herewith.
 
Exhibit

No.
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
8/7/2008
3.1Pinnacle West3.1 to Pinnacle West/APS June 30, 2008 Form 10-Q Report, File No. 1-89628/7/2008
3.2Pinnacle West3.1 to Pinnacle West/APS February 28, 201725, 2020 Form 8-K Report, File Nos. 1-8962 and 1-44732/28/201725/2020
3.3APSArticles of Incorporation, restated as of May 25, 19884.2 to APS’s Form 18 Registration Nos. 33-33910 and 33-55248 by means of September 24, 1993 Form 8-K Report, File No. 1-44739/29/1993
3.3.13.3(1)APS3.1 to Pinnacle West/APS May 22, 2012 Form 8-K Report, File Nos. 1-8962 and 1-44735/22/2012
3.4APS3.4 to Pinnacle West/APS December 31, 2008 Form 10-K Report, File No. 1-44732/20/2009
4.1Pinnacle West
4.1 to Pinnacle West June 20, 2017 Form 8-K Report, File No. 1-8962

6/20/2017

4.2Pinnacle West
APS
Pinnacle West
APS
4.6 to APS’s Registration Statement Nos. 33-61228 and 33-55473 by means of January 1, 1995 Form 8-K Report, File No. 1-44731/11/1995
4.2a4.3Pinnacle West
APS
Pinnacle West
APS
4.4 to APS’s Registration Statement Nos. 33-61228 and 33-55473 by means of January 1, 1995 Form 8-K Report, File No. 1-44731/11/1995
4.3
Pinnacle West
APS
4.5 to APS’s Registration Statements Nos. 33-61228, 33-55473, 33-64455 and 333- 15379 by means of November 19, 1996 Form 8-K Report, File No. 1-447311/22/1996

Exhibit
No.
4.4
Registrant(s)Pinnacle WestDescription
Previously Filed as Exhibit: a
Date Filed
4.3a
Pinnacle West
APS
4.6 to APS’s Registration Statements Nos. 33-61228, 33-55473, 33-64455 and 333-15379 by means of November 19, 1996 Form 8-K Report, File No. 1-447311/22/1996
4.3b
Pinnacle West
APS
4.10 to APS’s Registration Statement Nos. 33-55473, 33-64455 and 333-15379 by means of April 7, 1997 Form 8-K Report, File No. 1-44734/9/1997
4.3c
Pinnacle West
APS
10.2 to Pinnacle West’s March 31, 2003 Form 10-Q Report, File No. 1-89625/15/2003
4.4Pinnacle West4.1 to Pinnacle West’s Registration Statement No. 333-5247612/21/2000
205

4.4aExhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
4.4(a)Pinnacle West4.1 to Pinnacle West November 30, 2017June 10, 2020 Form 8-K Report, File No. 1-896211/30/20176/16/2020
4.5Pinnacle West4.2 to Pinnacle West’s Registration Statement No. 333-5247612/21/2000
4.6Pinnacle West
APS
Pinnacle West
APS
4.10 to APS’s Registration Statement Nos. 333-15379 and 333-27551 by means of January 13, 1998 Form 8-K Report, File No. 1-44731/16/1998
4.6a4.6(a)Pinnacle West
APS
Pinnacle West
APS
4.1 to APS’s Registration Statement No. 333-90824 by means of May 7, 2003 Form 8-K Report, File No. 1-44735/9/2003
4.6b4.6(b)Pinnacle West
APS
Pinnacle West
APS
4.1 to APS’s Registration Statement No. 333-106772 by means of June 24, 2004 Form 8-K Report, File No. 1-44736/28/2004
4.6c
Pinnacle West
APS
4.1 to APS’s Registration Statements Nos. 333-106772 and 333-121512 by means of August 17, 2005 Form 8-K Report, File No. 1-44738/22/2005
4.6d4.6(c)APS4.1 to APS’s July 31, 2006 Form 8-K Report, File No. 1-44738/3/2006
4.6e4.6(d)Pinnacle West
APS
Pinnacle West
APS
4.6e to Pinnacle West/APS 2014 Form 10-K Report, File Nos. 1-8962 and 1-44732/20/2015
4.6f
Pinnacle West
APS
4.6f to Pinnacle West/APS 2014 Form 10-K Report, File Nos. 1-8962 and 1-44732/20/2015
4.6g4.6(e)Pinnacle West
APS
Pinnacle West
APS
4.6g to Pinnacle West/APS 2014 Form 10-K Report, File Nos. 1-8962 and 1-44732/20/2015

Exhibit
No.
4.6(f)
Registrant(s)Pinnacle West
APS
Description
Previously Filed as Exhibit: a
Date Filed
4.6h
Pinnacle West
APS
4.6h to Pinnacle West/APS 2014 Form 10-K Report, File Nos. 1-8962 and 1-44732/20/2015
4.6i4.6(g)Pinnacle West
APS
Pinnacle West
APS
4.6i to Pinnacle West/APS 2014 Form 10-K Report, File Nos. 1-8962 and 1-44732/20/2015
4.6j4.6(h)Pinnacle West
APS
Pinnacle West
APS
4.6j to Pinnacle West/APS 2014 Form 10-K Report, File Nos. 1-8962 and 1-44732/20/2015
4.6k
Pinnacle West
APS
4.1 to Pinnacle West/APS May 14, 2015 Form 8-K Report, File Nos. 1-8962 and 1-44735/19/2015
4.6l4.6(i)Pinnacle West
APS
Pinnacle West
APS
4.1 to Pinnacle West/APS November 3, 2015 Form 8-K Report, File Nos. 1-8962 and 1-447311/6/2015
4.6m4.6(j)Pinnacle West
APS
Pinnacle West
APS
4.1 to Pinnacle West/APS May 3, 2016 Form 8-K Report, File Nos. 1-8962 and 1-44735/6/2016
4.6n4.6(k)Pinnacle West
APS
Pinnacle West
APS
4.1 to Pinnacle West/APS September 15, 2016 Form 8-K Report, File Nos. 1-8962 and 1-44739/20/2016
4.6o4.6(l)Pinnacle West
APS
Pinnacle West
APS
4.1 to Pinnacle West/APS September 11, 2017 Form 8-K Report, File Nos. 1-8962 and 1-44739/11/2017
206

4.6pExhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
4.6(m)Pinnacle West

APS
4.1 to Pinnacle West/APS August 9, 2018 Form 8-K Report, File Nos. 1-8962 and 1-44738/9/2018
4.6q4.6(n)Pinnacle West
APS
Pinnacle West
APS
4.1 to Pinnacle West/APS February 28, 2019 Form 8-K Report, File Nos. 1-8962 and 1-44732/28/2019
4.6r4.6(o)Pinnacle West
APS
Pinnacle West
APS
4.1 to Pinnacle West/APS August 16, 2019 Form 8-K Report, File Nos. 1-8962 and 1-44738/16/2019
4.6s4.6(p)Pinnacle West
APS
Pinnacle West
APS
4.1 to Pinnacle West/APS November 20, 2019 Form 8-K Report, File Nos. 1-8962 and 1-447311/20/2019
4.74.6(q)Pinnacle West
APS
4.1 to Pinnacle West/APS May 22, 2020 Form 8-K Report, File Nos. 1-8962 and 1-44735/22/2020
4.6(r)Pinnacle West
APS
4.1 to Pinnacle West/APS September 11, 2020 Form 8-K Report, File Nos. 1-8962 and 1-44739/11/2020
4.6(s)Pinnacle West
APS
4.1 to Pinnacle West/APS August 16, 2021 Form 8-K Report, File Nos. 1-8962 and 1-44738/16/2021
4.6(t)Pinnacle West
APS
4.1 to Pinnacle West/APS November 8, 2022 Form 8-K Report, File Nos. 1-8962 and 1-447311/8/2022
4.7Pinnacle West4.4 to Pinnacle West’s June 23, 2004 Form 8-K Report, File No. 1-89628/9/2004
4.7a4.7(a)Pinnacle West4.1 to Pinnacle West’s Form S-3 Registration Statement No. 333-155641, File No. 1-896211/25/2008
4.8Pinnacle WestAgreement, dated March 29, 1988, relating to the filing of instruments defining the rights of holders of long-term debt not in excess of 10% of the Company’s total assets4.1 to Pinnacle West’s 1987 Form  10-K Report, File No. 1-89623/30/1988

Exhibit
No.
4.8(a)
Registrant(s)Pinnacle West
APS
Description
Previously Filed as Exhibit: a
Date Filed
4.8a
Pinnacle West
APS
4.1 to APS’s 1993 Form 10-K Report, File No. 1-44733/30/1994
4.9Pinnacle West
APS
Pinnacle West
APS
10.1.110.1(1)
Pinnacle West

APS
Two separate Decommissioning Trust Agreements (relating to PVGS Units 1 and 3, respectively), each dated July 1, 1991, between APS and Mellon Bank, N.A., as Decommissioning Trustee10.2 to APS’s September 30, 1991 Form 10-Q Report, File No. 1-447311/14/1991
207

10.1.1aExhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
10.1(1)(a)Pinnacle West

APS
10.1 to APS’s 1994 Form 10-K Report, File No. 1-44733/30/1995
10.1.1b10.1(1)(b)Pinnacle West
APS
Pinnacle West
APS
10.2 to APS’s 1994 Form 10-K Report, File No. 1-44733/30/1995
10.1.1c10.1(1)(c)Pinnacle West
APS
Pinnacle West
APS
10.4 to APS’s 1996 Form 10-K Report, , File No. 1-44733/28/1997
10.1.1d10.1(1)(d)Pinnacle West
APS
Pinnacle West
APS
10.6 to APS’s 1996 Form 10-K Report, File No. 1-44733/28/1997
10.1.1e10.1(1)(e)Pinnacle West
APS
Pinnacle West
APS
10.2 to Pinnacle West’s March 31, 2002 Form 10-Q Report, File No. 1-89625/15/2002
10.1.1f10.1(1)(f)Pinnacle West
APS
Pinnacle West
APS
10.4 to Pinnacle West’s March 2002 Form 10-Q Report, File No. 1-89625/15/2002
10.1.1g10.1(1)(g)Pinnacle West
APS
Pinnacle West
APS
10.3 to Pinnacle West’s 2003 Form 10-K Report, File No. 1-89623/15/2004
10.1.1h10.1(1)(h)Pinnacle West
APS
Pinnacle West
APS
10.5 to Pinnacle West’s 2003 Form 10-K Report, File No. 1-89623/15/2004
10.1.1i10.1(1)(i)Pinnacle West
APS
Pinnacle West
APS
10.1 to Pinnacle West/APS March 31, 2007 Form 10-Q Report, File Nos. 1-8962 and 1-44735/9/2007
10.1.1j10.1(1)(j)Pinnacle West
APS
Pinnacle West
APS
10.2 to Pinnacle West/APS March 31, 2007 Form 10-Q Report, File Nos. 1-8962 and 1044735/9/2007

Exhibit
No.
10.1(2)
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
10.1.2
Pinnacle West

APS
Amended and Restated Decommissioning Trust Agreement (PVGS Unit 2) dated as of January 31, 1992, among APS, Mellon Bank, N.A., as Decommissioning Trustee, and State Street Bank and Trust Company, as successor to The First National Bank of Boston, as Owner Trustee under two separate Trust Agreements, each with a separate Equity Participant, and as Lessor under two separate Facility Leases, each relating to an undivided interest in PVGS Unit 210.1 to Pinnacle West’s 1991 Form 10-K Report, File No. 1-89623/26/1992
208

10.1.2aExhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
10.1(2)(a)Pinnacle West

APS
First Amendment to Amended and Restated Decommissioning Trust Agreement (PVGS Unit 2), dated as of November 1, 199210.2 to APS’s 1992 Form 10-K Report, File No. 1-44733/30/1993
10.1.2b10.1(2)(b)Pinnacle West
APS
Pinnacle West
APS
10.3 to APS’s 1994 Form 10-K Report, File No. 1-44733/30/1995
10.1.2c10.1(2)(c)Pinnacle West
APS
Pinnacle West
APS
10.1 to APS’s June 30, 1996 Form 10-Q Report, File No. 1-44738/9/1996
10.1.2d10.1(2)(d)Pinnacle West
APS
Pinnacle West
APS
APS 10.5 to APS’s 1996 Form 10-K Report, File No. 1-44733/28/1997
10.1.2e10.1(2)(e)Pinnacle West
APS
Pinnacle West
APS
10.1 to Pinnacle West’s March 31, 2002 Form 10-Q Report, File No. 1-89625/15/2002
10.1.2f10.1(2)(f)Pinnacle West
APS
Pinnacle West
APS
10.3 to Pinnacle West’s March 31, 2002 Form 10-Q Report, File No. 1-89625/15/2002
10.1.2g10.1(2)(g)Pinnacle West
APS
Pinnacle West
APS
10.4 to Pinnacle West’s 2003 Form 10-K Report, File No. 1-89623/15/2004
10.1.2h10.1(2)(h)Pinnacle West
APS
Pinnacle West
APS
10.1.2h to Pinnacle West’s 2007 Form 10-K Report, File No. 1-89622/27/2008
10.2.110.2(1)b
Pinnacle West

APS
Arizona Public Service Company Deferred Compensation Plan, as restated, effective January 1, 1984, and the second and third amendments thereto, dated December 22, 1986, and December 23, 1987, respectively10.4 to APS’s 1988 Form 10-K Report, File No. 1-44733/8/1989
10.2.1a10.2(1)(a)b
Pinnacle West
APS
Pinnacle West
APS
10.3A to APS’s 1993 Form 10-K Report, File No. 1-44733/30/1994

Exhibit
No.10.2(1)(b)b
Registrant(s)Pinnacle West
APS
Description
Previously Filed as Exhibit: a
Date Filed
10.2.1bb
Pinnacle West
APS
10.2 to APS’s September 30, 1994 Form 10-Q Report, File No. 1-447311/10/1994
10.2.1c10.2(1)(c)b
Pinnacle West
APS
Pinnacle West
APS
10.3A to APS’s 1996 Form 10-K Report, File No. 1-44733/28/1997
209

Exhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
10.2.1d10.2(1)(d)b
Pinnacle West
APS
Pinnacle West
APS
10.8A to Pinnacle West’s 2000 Form 10-K Report, File No. 1-89623/14/2001
10.2.210.2(2)b
Pinnacle West

APS
Arizona Public Service Company Directors’ Deferred Compensation Plan, as restated, effective January 1, 198610.1 to APS’s June 30, 1986 Form 10-Q Report, File No. 1-44738/13/1986
10.2.2a10.2(2)(a)b
Pinnacle West
APS
Pinnacle West
APS
10.2A to APS’s 1993 Form 10-K Report, File No. 1-44733/30/1994
10.2.2b10.2(2)(b)b
Pinnacle West
APS
Pinnacle West
APS
10.1 to APS’s September 30, 1994 Form 10-Q Report, File No. 1-447311/10/1994
10.2.2c10.2(2)(c)b
Pinnacle West
APS
Pinnacle West
APS
10.8A to Pinnacle West’s 1999 Form 10-K Report, File No. 1-89623/30/2000
10.2.310.2(3)b
Pinnacle West
APS
Pinnacle West
APS
10.14A to Pinnacle West’s 1999 Form 10-K Report, File No. 1-89623/30/2000
10.2.3a10.2(3)(a)b
Pinnacle West
APS
Pinnacle West
APS
10.15A to Pinnacle West’s 1999 Form 10-K Report, File No. 1-89623/30/2000
10.2.410.2(4)b
Pinnacle West
APS
Pinnacle West
APS
10.10A to APS’s 1995 Form 10-K Report, File No. 1-44733/29/1996
10.2.4a10.2(4)(a)b
Pinnacle West
APS
Pinnacle West
APS
10.7A to Pinnacle West’s 1999 Form 10-K Report, File No. 1-89623/30/2000

Exhibit
No.10.2(4)(b)b
Registrant(s)Pinnacle West
APS
Description
Previously Filed as Exhibit: a
Date Filed
10.2.4bb
Pinnacle West
APS
10.10A to Pinnacle West’s 1999 Form 10-K Report, File No. 1-89623/30/2000
210

Exhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
10.2.4c10.2(4)(c)b
Pinnacle West
APS
Pinnacle West
APS
10.3 to Pinnacle West’s March 31, 2003 Form 10-Q Report, File No. 1-89625/15/2003
10.2.4d10.2(4)(d)b
Pinnacle West
APS
Pinnacle West
APS
10.64b to Pinnacle West/APS 2005 Form 10-K Report, File Nos. 1-8962 and 1-44733/13/2006
10.2.510.2(5)b
Pinnacle West
APS
Pinnacle West
APS
10.2.5 to Pinnacle West/APS 2015 Form 10-K Report, File Nos. 1-8962 and 1-44732/19/2016
10.3.110.3(1)b
Pinnacle West
APS
Pinnacle West
APS
10.7A to Pinnacle West’s 2003 Form 10-K Report, File No. 1-89623/15/2004
10.3.1a10.3(1)(a)b
Pinnacle West
APS
Pinnacle West
APS
10.48b to Pinnacle West/APS 2005 Form 10-K Report, File Nos. 1-8962 and 1-44733/13/2006
10.3.210.3(2)b
Pinnacle West
APS
Pinnacle West
APS
10.3.2 to Pinnacle West/APS 2015 Form 10-K Report, File Nos. 1-8962 and 1-44732/19/2016
10.3.2a10.3(2)(a)b
Pinnacle West
APS
Pinnacle West
APS
10.3.2a to Pinnacle West/APS 2016 Form 10-K Report, File Nos. 1-8962 and 1-44732/24/2017
10.3.2b10.3(2)(b)b
Pinnacle West
APS
Pinnacle West
APS
10.3.2b to Pinnacle West/APS 2017 Form 10-K Report, File Nos. 1-8962 and 1-44732/23/2018
10.4.1b
Pinnacle West10.1 to Pinnacle West/APS September 30, 2019 Form 10-Q Report, File Nos. 1-8962 and 1-447311/7/2019
10.4.2b
Pinnacle West
APS
10.1 to Pinnacle West/APS June 30, 2008 Form 10-Q Report, File Nos. 1-8962 and 1-44738/7/2008

Exhibit
No.10.4(1)b
Registrant(s)Pinnacle West
APS
Description
Previously Filed as Exhibit: a
Date Filed
10.4.3b
APS10.4.2 to Pinnacle West/APS 2018 Form 10-K Report, File Nos. 1-8962 and 1-44732/22/2019
10.4.4b
APS10.4.3 to Pinnacle West/APS 2018 Form 10-K Report, File Nos. 1-8962 and 1-44732/22/2019
10.4.5b
Pinnacle West
APS
10.4.5 to Pinnacle West/APS 2019 Form 10-K Report, File Nos. 1-8962 and 1-44732/21/2020
10.4.610.4(2)b
Pinnacle West
APS
Pinnacle West
APS
10.4.6 to Pinnacle West/APS 2019 Form 10-K Report, File Nos. 1-8962 and 1-4473
2/21/2020
10.5.110.4(3)bdb
Pinnacle West
APS
10.4.4 to Pinnacle West/APS 2020 Form 10-K Report, File Nos. 1-8962 and 1-44732/24/2021
211

Exhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
10.4(4)b
Pinnacle West
APS
10.4.5a to Pinnacle West/APS 2021 Form 10-K Report, File Nos. 1-8962 and 1-44732/24/2021
10.4(5)b
Pinnacle West
APS
10.4.5b to Pinnacle West/APS 2021 Form 10-K Report, File Nos. 1-8962 and 1-44732/24/2021
10.4(6)(a)b
Pinnacle West
APS
10.4.6 to Pinnacle West/APS 2021 Form 10-K Report, File Nos. 1-8962 and 1-44732/24/2021
10.4(6)(b)b
Pinnacle West
APS
10.4.7 to Pinnacle West/APS 2021 Form 10-K Report, File Nos. 1-8962 and 1-44732/24/2021
10.4(7)b
Pinnacle West
APS
10.4.8 to Pinnacle West/APS 2021 Form 10-K Report, File Nos. 1-8962 and 1-44732/24/2021
10.4(8)b
Pinnacle West
APS
10.4(9)b
Pinnacle West
APS
10.4(10)b
Pinnacle West
APS
10.5(1)bd
Pinnacle West
APS
10.77bd to Pinnacle West/APS 2005 Form 10-K Report, File Nos. 1-8962 and 1-44733/13/2006
10.5.1a10.5(1)(a)bd
Pinnacle West
APS
Pinnacle West
APS
10.4 to Pinnacle West/APS September 30, 2007 Form 10-Q Report, File Nos. 1-8962 and 1-447311/6/2007
10.5.210.5(2)bd
Pinnacle West
APS
Pinnacle West
APS
10.3 to Pinnacle West/APS September 30, 2007 Form 10-Q Report, File Nos. 1-8962 and 1-447311/6/2007
10.5.310.5(3)bd
Pinnacle West
APS
Pinnacle West
APS
10.5.3 to Pinnacle West/APS 2009 Form 10-K Report, File Nos. 1-8962 and 1-44732/19/2010
10.5.410.5(4)bd
Pinnacle West
APS
Pinnacle West
APS
10.5.4 to Pinnacle West/APS 2012 Form 10-K Report, File Nos. 1-8962 and 1-44732/22/2013
10.6.110.5(5)bbd
Pinnacle West
APS
10.4 to Pinnacle West/APS June 30, 2021 Form 10-Q Report, File Nos. 1-8962 and 1-44738/5/2021
212

Exhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
10.6(1)b
Pinnacle WestAppendix B to the Proxy Statement for Pinnacle West’s 2007 Annual Meeting of Shareholders, File No. 1-89624/20/2007
10.6.1a10.6(1)(a)b
Pinnacle West10.2 to Pinnacle West/APS April 18, 2007 Form 8-K Report, File No. 1-89624/20/2007
10.6.1b10.6(1)(b)bd
Pinnacle West
APS
Pinnacle West
APS
10.3 to Pinnacle West/APS March 31, 2009 Form 10-Q Report, File Nos. 1-8962 and 1-44735/5/2009
10.6.1c10.6(1)(c)bd
Pinnacle West10.1 to Pinnacle West/APS June 30, 2010 Form 10-Q Report, File No. 1-89628/3/2010
10.6.1d10.6(1)(d)bd
Pinnacle West10.2 to Pinnacle West/APS June 30, 2010 Form 10-Q Report, File No. 1-89628/3/2010

Exhibit
No.10.6(1)(e)bd
Registrant(s)Pinnacle WestDescription
Previously Filed as Exhibit: a
Date Filed
10.6.1ebd
Pinnacle West10.4 to Pinnacle West/APS March 31, 2011 Form 10-Q Report, File No. 1-89624/29/2011
10.6.1f10.6(1)(f)bd
Pinnacle West10.5 to Pinnacle West/APS March 31, 2011 Form 10-Q Report, File No. 1-89624/29/2011
10.6.1g10.6(1)(g)bd
Pinnacle West10.6 to Pinnacle West/APS March 31, 2011 Form 10-Q Report, File No. 1-89624/29/2011
10.6.210.6(2)b
Pinnacle West10.1 to Pinnacle West/APS September 30, 2007 Form 10-Q Report, File No. 1-896211/6/2007
10.6.310.6(3)b
Pinnacle West10.2 to Pinnacle West/APS June 30, 2008 Form 10-Q Report, File No. 1-89628/7/2008
10.6.410.6(4)bd
Pinnacle West
APS
Pinnacle West
APS
10.6.5Pinnacle WestPinnacle West/APS December 24, 2012 Form 8-K Report, File No. 1-896212/26/2012
10.6.610.6(5)b
Pinnacle West
APS
Pinnacle West
APS
Appendix A to the Proxy Statement for Pinnacle West’s 2012 Annual Meeting of Shareholders, File No. 1-89623/29/2012
10.6.6a10.6(5)(a)bd
Pinnacle West10.1 to Pinnacle West/APS March 31, 2012 Form 10-Q Report, File Nos. 1-8962 and 1-44735/3/2012
10.6.6b10.6(5)(b)bd
Pinnacle West10.2 to Pinnacle West/APS March 31, 2012 Form 10-Q Report, File Nos. 1-8962 and 1-44735/3/2012
213

Exhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
10.6.6c10.6(5)(c)bd
Pinnacle West10.6.8c to Pinnacle West/APS 2013 Form 10-K Report, File Nos. 1-8962 and 1-44732/21/2014
10.6.6d10.6(5)(d)bd
Pinnacle West10.6.8d to Pinnacle West/APS 2013 Form 10-K Report, File Nos. 1-8962 and 1-44732/21/2014
10.6.6e10.6(5)(e)bd
Pinnacle West10.6.6e to Pinnacle West/APS 2015 Form 10-K Report, File Nos. 1-8962 and 1-44732/19/2016
10.6.6f10.6(5)(f)bd
Pinnacle West10.6.6f to Pinnacle West/APS 2016 Form 10-K Report, File Nos. 1-8962 and 1-44732/24/2017

Exhibit
No.10.6(5)(g)bd
Registrant(s)Pinnacle WestDescription
Previously Filed as Exhibit: a
Date Filed
10.6.6gbd
Pinnacle West10.6.6g to Pinnacle West/APS 2016 Form 10-K Report, File Nos. 1-8962 and 1-44732/24/2017
10.6.6h10.6(5)(h)bd
Pinnacle West10.2 to Pinnacle West/APS March 31, 2019 Form 10-Q Report, File Nos. 1-8962 and 1-44735/1/2019
10.6.6i10.6(5)(i)bd
Pinnacle West10.3 to Pinnacle West/APS March 31, 2019 Form 10-Q Report, File Nos. 1-8962 and 1-44735/1/2019
10.6.6j10.6(5)(j)bd
Pinnacle West10.1 to Pinnacle West/APS March 31, 2020 Form 10-Q Report, File Nos. 1-8962 and 1-44735/8/2020
10.6(5)(k)bd
Pinnacle West10.6.5k to Pinnacle West/APS 2020 Form 10-K Report, File Nos. 1-8962 and 1-44732/24/2021
10.6(5)(l)bd
Pinnacle West10.6.5l to Pinnacle West/APS 2020 Form 10-K Report, File Nos. 1-8962 and 1-44732/24/2021
10.6(5)(m)bd
Pinnacle West
APS
Appendix A to the Proxy Statement for Pinnacle West’s 2021 Annual Meeting of Shareholders, File No. 1-89624/01/2021
10.6(5)(n)bd
Pinnacle West10.6.5n to Pinnacle West/APS 2020 Form 10-K Report, File Nos. 1-8962 and 1-44732/25/2022
10.6(5)(o)bd
Pinnacle West10.6.5o to Pinnacle West/APS 2020 Form 10-K Report, File Nos. 1-8962 and 1-44732/25/2022
214

Exhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
10.6(5)(p)bd
Pinnacle West10.6.5p to Pinnacle West/APS 2020 Form 10-K Report, File Nos. 1-8962 and 1-44732/25/2022
10.6(5)(q)bd
Pinnacle West10.6.5q to Pinnacle West/APS 2020 Form 10-K Report, File Nos. 1-8962 and 1-44732/25/2022
10.6(5)(r)bd
Pinnacle West10.6.5r to Pinnacle West/APS 2020 Form 10-K Report, File Nos. 1-8962 and 1-44732/25/2022
10.6(5)(s)bd
Pinnacle West10.6.5s to Pinnacle West/APS 2020 Form 10-K Report, File Nos. 1-8962 and 1-44732/25/2022
10.6(5)(t)bd
Pinnacle West10.3 to Pinnacle West/APS March 31, 2012 Form 10-Q Report, File Nos. 1-8962 and 1-44735/3/2012
10.6.6k10.6(5)(u)bd
Pinnacle West10.4 to Pinnacle West/APS March 31, 2012 Form 10-Q Report, File Nos. 1-8962 and 1-44735/3/2012
10.6.6l10.6(5)(v)bd
Pinnacle West10.1 to Pinnacle West/APS June 30, 2017 Form 10-Q Report, File Nos. 1-8962 and 1-44735/2/2017
10.6.6mbd
Pinnacle WestAppendix A to the Proxy Statement for Pinnacle West’s 2017 Annual Meeting of Shareholders, File No. 1-89623/31/2017
10.7.110.7(1)
Pinnacle West

APS
Indenture of Lease with Navajo Tribe of Indians, Four Corners Plant5.01 to APS'sAPS’s Form S-7 Registration Statement, File No. 2-596449/1/1977
10.7.1a10.7(1)(a)
Pinnacle West

APS
Supplemental and Additional Indenture of Lease, including amendments and supplements to original lease with Navajo Tribe of Indians, Four Corners Plant5.02 to APS’s Form S-7 Registration Statement, File No. 2-596449/1/1977
10.7.1b10.7(1)(b)
Pinnacle West

APS
Amendment and Supplement No. 1 to Supplemental and Additional Indenture of Lease Four Corners, dated April 25, 198510.36 to Pinnacle West’s Registration Statement on Form 8-B Report, File No. 1-897/25/1985
10.7.1c10.7(1)(c)Pinnacle West
APS
Pinnacle West
APS
10.1 to Pinnacle West/APS March 31, 2011 Form 10-Q Report, File Nos. 1-8962 and 1-44734/29/2011
10.7.1d10.7(1)(d)Pinnacle West
APS
Pinnacle West
APS
10.2 to Pinnacle West/APS March 31, 2011 Form 10-Q Report, File Nos. 1-8962 and 1-44734/29/2011
10.7.210.7(2)
Pinnacle West

APS
Application and Grant of multi-party rights-of-way and easements, Four Corners Plant Site5.04 to APS’s Form S-7 Registration Statement, File No. 2-596449/1/1977
10.7.2a10.7(2)(a)
Pinnacle West

APS
Application and Amendment No. 1 to Grant of multi-party rights-of-way and easements, Four Corners Site dated April 25, 198510.37 to Pinnacle West’s Registration Statement on Form 8-B, File No. 1-89627/25/1985

215

Exhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
10.7(3)Pinnacle West
APS
Application and Grant of APS rights- of-way and easements, Four Corners Site5.05 to APS’s Form S-7 Registration Statement, File No. 2-596449/1/1977
Exhibit
No.
10.7(3)(a)
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
10.7.3
Pinnacle West

APS
Application and Grant of APS rights- of-way and easements, Four Corners Site5.05 to APS’s Form S-7 Registration Statement, File No. 2-596449/1/1977
10.7.3a
Pinnacle West
APS
Application and Amendment No. 1 to Grant of APS rights-of-way and easements, Four Corners Site dated April 25, 198510.38 to Pinnacle West’s Registration Statement on Form 8-B, File No. 1-89627/25/1985
10.7.410.7(4)Pinnacle West
APS
Pinnacle West
APS
10.7.4c to Pinnacle West/APS June 30, 2018 Form 10-Q Report, File Nos. 1-8962 and 1-44738/3/2018
10.7(4)(a)Pinnacle West
APS
10.5 to Pinnacle West/APS June 30, 2021 Form 10-Q Report, File Nos. 1-8962 and 1-44738/5/2021
10.8.1
10.8(1)Pinnacle West

APS
Indenture of Lease, Navajo Units 1, 2, and 35(g) to APS’s Form S-7 Registration Statement, File No. 2-365053/23/1970
10.8.210.8(2)
Pinnacle West

APS
Application of Grant of rights-of-way and easements, Navajo Plant5(h) to APS Form S-7 Registration Statement, File No. 2-365053/23/1970
10.8.310.8(3)
Pinnacle West

APS
Water Service Contract Assignment with the United States Department of Interior, Bureau of Reclamation, Navajo Plant5(l) to APS’s Form S-7 Registration Statement, File No. 2-3944423/16/1971
10.8.410.8(4)Pinnacle West
APS
Pinnacle West
APS
10.107 to Pinnacle West/APS 2005 Form 10-K Report, File Nos. 1-8962 and 1-44733/13/2006
10.8.510.8(5)Pinnacle West
APS
Pinnacle West
APS
10.108 to Pinnacle West/APS 2005 Form 10-K Report, File Nos. 1-8962 and 1-44733/13/2006
216

10.9.1Exhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
10.9(1)Pinnacle West

APS
ANPP Participation Agreement, dated August 23, 1973, among APS, SRP, SCE, Public Service Company of New Mexico, El Paso, Southern California Public Power Authority, and Department of Water and Power of the City of Los Angeles, and amendments 1-12 thereto10. 110.1 to APS’s 1988 Form 10-K Report, File No. 1-44733/8/1989

Exhibit
No.
10.9(1)(a)
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
10.9.1a
Pinnacle West

APS
Amendment No. 13, dated as of April 22, 1991, to ANPP Participation Agreement, dated August 23, 1973, among APS, SRP, SCE, Public Service Company of New Mexico, El Paso, Southern California Public Power Authority, and Department of Water and Power of the City of Los Angeles10.1 to APS’s March 31, 1991 Form 10-Q Report, File No. 1-44735/15/1991
10.9.1b10.9(1)(b)Pinnacle West
APS
Pinnacle West
APS
99.1 to Pinnacle West’s June 30, 2000 Form 10-Q Report, File No. 1-89628/14/2000
10.9.1c10.9(1)(c)Pinnacle West
APS
Pinnacle West
APS
10.9.1c to Pinnacle West/APS 2010 Form 10-K Report, File Nos. 1-8962 and 1-44732/18/2011
10.9.1d10.9(1)(d)Pinnacle West
APS
Pinnacle West
APS
10.2 to Pinnacle West/APS March 31, 2014 Form 10-Q Report, File Nos. 1-8962 and 1-44735/2/2014
10.10.110.10(1)
Pinnacle West

APS
Asset Purchase and Power Exchange Agreement dated September 21, 1990 between APS and PacifiCorp, as amended as of October 11, 1990 and as of July 18, 199110.1 to APS’s June 30, 1991 Form 10-Q Report, File No. 1-44738/8/1991
10.10.210.10(2)
Pinnacle West

APS
Long-Term Power Transaction Agreement dated September 21, 1990 between APS and PacifiCorp, as amended as of October 11, 1990, and as of July 8, 199110.2 to APS’s June 30, 1991 Form 10-Q Report, File No. 1-44738/8/1991
10.10.2a10.10(2)(a)Pinnacle West
APS
Pinnacle West
APS
10.3 to APS’s 1995 Form 10-K Report, File No. 1-44733/29/1996
10.10.3
Pinnacle West
APS
10.4 to APS’s 1995 Form 10-K Report, File No. 1-44733/29/1996

217

Exhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
Exhibit
No.
10.10(3)
Registrant(s)Pinnacle West
APS
DescriptionDate Filed10.4 to APS’s 1995 Form 10-K Report, File No. 1-44733/29/1996
10.10.4
10.10(4)Pinnacle West
APS
Pinnacle West
APS
10.5 to APS’s 1995 Form 10-K Report, File No. 1-44733/29/1996
10.10.510.10(5)Pinnacle West
APS
Pinnacle West
APS
10.6 to APS’s 1995 Form 10-K Report, File No. 1-44733/29/1996
10.11.110.11(1)Pinnacle West10.4.2 to Pinnacle West/APS 2018 Form 10-K Report, File Nos. 1-8962 and 1-44732/22/2019
10.11.2Pinnacle West APS10.1 to Pinnacle West/APS March 31, 2019 Form 10-Q Report, File Nos. 1-8962 and 1-44735/1/2019
10.11.310.11(2)Pinnacle West10.310.1 to Pinnacle West/APS June 30, 20182021 Form 10-Q Report, File Nos. 1-8962 and 1-44738/3/20185/2021
10.11.410.11(3)Pinnacle West
APS
10.1 to Pinnacle West/APS June 30, 2019 Form 10-Q Report, File Nos. 1-8962 and 1-44738/8/2019
10.11.5
Pinnacle West
APS
10.2 to Pinnacle West/APS June 30, 20172021 Form 10-Q Report, File Nos. 1-8962 and 1-44738/3/20175/2021
10.11(4)Pinnacle West
APS
10.11.5a
Pinnacle West
APS
10.11.4a10.3 to Pinnacle West/APS June 30, 20182021 Form 10-Q Report, File Nos. 1-8962 and 1-44738/3/2018

5/2021
Exhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: 10.12(1)ac
Date Filed
10.11.6
Pinnacle West

APS

10.4 to Pinnacle West/APS June 30, 2018 Form 10-Q Report, File Nos. 1-8962 and 1-44738/3/2018
10.12.1c
Pinnacle West
APS
Facility Lease, dated as of August 1, 1986, between U.S. Bank National Association, successor to State Street Bank and Trust Company, as successor to The First National Bank of Boston, in its capacity as Owner Trustee, as Lessor, and APS, as Lessee4.3 to APS’s Form 18 Registration Statement, File No. 33-948010/24/1986
10.12.1a10.12(1)(a)c
Pinnacle West

APS
Amendment No. 1, dated as of November 1, 1986, to Facility Lease, dated as of August 1, 1986, between U.S. Bank National Association, successor to State Street Bank and Trust Company, as successor to The First National Bank of Boston, in its capacity as Owner Trustee, as Lessor, and APS, as Lessee10.5 to APS’s September 30, 1986 Form 10-Q Report by means of Amendment No. 1 on December 3, 1986 Form 8, File No. 1-447312/4/1986
218

Exhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
10.12.1b10.12(1)(b)c
Pinnacle West

APS
Amendment No. 2 dated as of June 1, 1987 to Facility Lease dated as of August 1, 1986 between U.S. Bank National Association, successor to State Street Bank and Trust Company, as successor to The First National Bank of Boston, as Lessor, and APS, as Lessee10.3 to APS’s 1988 Form 10-K Report, File No. 1-44733/8/1989
10.12.1c10.12(1)(c)c
Pinnacle West

APS
Amendment No. 3, dated as of March 17, 1993, to Facility Lease, dated as of August 1, 1986, between U.S. Bank National Association, successor to State Street Bank and Trust Company, as successor to The First National Bank of Boston, as Lessor, and APS, as Lessee10.3 to APS’s 1992 Form 10-K Report, File No. 1-44733/30/1993
10.12.1d10.12(1)(d)c
Pinnacle West
APS
Pinnacle West
APS
10.2 to Pinnacle West/APS September 30, 2015 Form 10-Q Report, File Nos. 1-8962 and 1-447310/30/2015

Exhibit
No.10.12(1)(e)c
Registrant(s)Pinnacle West
APS
Description
Previously Filed as Exhibit: a
Date Filed
10.12.1ec
Pinnacle West
APS
10.3 to Pinnacle West/APS September 30, 2015 Form 10-Q Report, File Nos. 1-8962 and 1-447310/30/2015
10.12.210.12(2)
Pinnacle West

APS
Facility Lease, dated as of December 15, 1986, between U.S. Bank National Association, successor to State Street Bank and Trust Company, as successor to The First National Bank of Boston, in its capacity as Owner Trustee, as Lessor, and APS, as Lessee10.1 to APS’s November 18, 1986 Form 8-K Report, File No. 1-44731/20/1987
10.12.2a10.12(2)(a)
Pinnacle West

APS
Amendment No. 1, dated as of August 1, 1987, to Facility Lease, dated as of December 15, 1986, between U.S. Bank National Association, successor to State Street Bank and Trust Company, as successor to The First National Bank of Boston, as Lessor, and APS, as Lessee4.13 to APS’s Form 18 Registration Statement No.  33-9480 by means of August 1, 1987 Form 8-K Report, File No. 1-44738/24/1987
219

10.12.2bExhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
10.12(2)(b)Pinnacle West

APS
Amendment No. 2, dated as of March 17, 1993, to Facility Lease, dated as of December 15, 1986, between U.S. Bank National Association, successor to State Street Bank and Trust Company, as successor to The First National Bank of Boston, as Lessor, and APS, as Lessee10.4 to APS’s 1992 Form 10-K Report, File No. 1-44733/30/1993
10.12.2c10.12(2)(c)Pinnacle West
APS
Pinnacle West
APS
10.2 to Pinnacle West/APS June 30, 2014 Form 10-Q Report, File Nos. 1-8962 and 1-44737/31/2014
10.12(2)(d)Pinnacle West
APS
10.1 to Pinnacle West/APS March 31, 2021 Form 10-Q Report, File Nos. 1-8962 and 1-44735/5/2021
10.13.1
10.13(1)Pinnacle West
APS
Pinnacle West
APS
10.102 to Pinnacle West/APS 2004 Form 10-K Report, File Nos. 1-8962 and 1-44733/16/2005
10.13.210.13(2)Pinnacle West
APS
Pinnacle West
APS
10.103 to Pinnacle West/APS 2004 Form 10-K Report, File Nos. 1-8962 and 1-44733/16/2005

Exhibit
No.
10.13(3)
Registrant(s)Pinnacle West
APS
Description
Previously Filed as Exhibit: a
Date Filed
10.13.3
Pinnacle West
APS
10.104 to Pinnacle West/APS 2004 Form 10-K Report, File Nos. 1-8962 and 1-44733/16/2005
10.13.410.13(4)Pinnacle West
APS
Pinnacle West
APS
10.105 to Pinnacle West/APS 2004 Form 10-K Report, File Nos. 1-8962 and 1-44733/16/2005
10.13.510.13(5)Pinnacle West
APS
Pinnacle West
APS
10.1 to Pinnacle West/APS March 31, 2010 Form 10-Q Report, File Nos. 1-8962 and 1-44735/6/2010
10.14.110.14(1)
Pinnacle West

APS
Contract, dated July 21, 1984, with DOE providing for the disposal of nuclear fuel and/or high-level radioactive waste, ANPP10.31 to Pinnacle West’s Form S-14 Registration Statement, File No. 2-963863/13/1985
10.15.110.15(1)Pinnacle West
APS
Pinnacle West
APS
10.1 to APS’s March 31, 1998 Form 10-Q Report, File No. 1-44735/15/1998
220

10.15.2Exhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
10.15(2)Pinnacle West

APS
10.2 to APS’s March 31, 1998 Form 10-Q Report, File No. 1-44735/15/1998
10.15.310.15(3)Pinnacle West
APS
Pinnacle West
APS
10.3 to APS’s March 31, 1998 Form 10-Q Report, File No. 1-44735/15/1998
10.15.3a10.15(3)(a)Pinnacle West
APS
Pinnacle West
APS
10.2 to APS’s May 19, 1998 Form  8-K Report, File No. 1-44736/26/1998
10.16Pinnacle West
APS
Pinnacle West
APS
10.1 to Pinnacle West/APS November 8, 2010 Form 8-K Report, File Nos. 1-8962 and 1-447311/8/2010
10.17Pinnacle West
APS
Pinnacle West
APS
10.17 to Pinnacle West/APS 2011 Form 10-K Report, File Nos. 1-8962 and 1-44732/24/2012
10.18Pinnacle West
APS
Pinnacle West
APS
10.1 to Pinnacle West/APS March 31, 2017 Form 10-Q Report, File Nos. 1-8962 and 1-44735/2/2017
10.19Pinnacle West10.2 to Pinnacle West/APS June 30, 2018 Form 10-Q Report, File Nos. 1-8962 and 1-44738/3/2018
21.1Pinnacle West
23.1Pinnacle West
23.2APS
31.1Pinnacle West

221

Exhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
32.2e
APS
99.1
Pinnacle West
APS
Collateral Trust Indenture among PVGS II Funding Corp., Inc., APS and Chemical Bank, as Trustee4.2 to APS’s 1992 Form 10-K Report, File No. 1-44733/30/1993
99.1a
Pinnacle West
APS
Supplemental Indenture to Collateral Trust Indenture among PVGS II Funding Corp., Inc., APS and Chemical Bank, as Trustee4.3 to APS’s 1992 Form 10-K Report, File No. 1-44733/30/1993
99.299.1c
Pinnacle West

APS
Participation Agreement, dated as of August 1, 1986, among PVGS Funding Corp., Inc., Bank of America National Trust and Savings Association, State Street Bank and Trust Company, as successor to The First National Bank of Boston, in its individual capacity and as Owner Trustee, Chemical Bank, in its individual capacity and as Indenture Trustee, APS, and the Equity Participant named therein28.1 to APS’s September 30, 1992 Form 10-Q Report, File No. 1-447311/9/1992
99.2a99.1(a)c
Pinnacle West

APS
Amendment No. 1 dated as of November 1, 1986, to Participation Agreement, dated as of August 1, 1986, among PVGS Funding Corp., Inc., Bank of America National Trust and Savings Association, State Street Bank and Trust Company, as successor to The First National Bank of Boston, in its individual capacity and as Owner Trustee, Chemical Bank, in its individual capacity and as Indenture Trustee, APS, and the Equity Participant named therein10.8 to APS’s September 30, 1986 Form 10-Q Report by means of Amendment No. 1, on December 3, 1986 Form 8, File No. 1-447312/4/1986

Exhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: 99.1(b)ac
Date Filed
99.2bc
Pinnacle West

APS
Amendment No. 2, dated as of March 17, 1993, to Participation Agreement, dated as of August 1, 1986, among PVGS Funding Corp., Inc., PVGS II Funding Corp., Inc., State Street Bank and Trust Company, as successor to The First National Bank of Boston, in its individual capacity and as Owner Trustee, Chemical Bank, in its individual capacity and as Indenture Trustee, APS, and the Equity Participant named therein28.4 to APS’s 1992 Form 10-K Report, File No. 1-44733/30/1993
99.399.2c
Pinnacle West

APS
Trust Indenture, Mortgage, Security Agreement and Assignment of Facility Lease, dated as of August 1, 1986, between State Street Bank and Trust Company, as successor to The First National Bank of Boston, as Owner Trustee, and Chemical Bank, as Indenture Trustee4.5 to APS’s Form 18 Registration Statement, File No. 33-948010/24/1986
222

Exhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
99.3a99.2(a)c
Pinnacle West

APS
Supplemental Indenture No. 1, dated as of November 1, 1986 to Trust Indenture, Mortgage, Security Agreement and Assignment of Facility Lease, dated as of August 1, 1986, between State Street Bank and Trust Company, as successor to The First National Bank of Boston, as Owner Trustee, and Chemical Bank, as Indenture Trustee10.6 to APS’s September 30, 1986 Form 10-Q Report by means of Amendment No. 1 on December  3, 1986 Form 8, File No. 1-447312/4/1986
99.3b99.2(b)c
Pinnacle West

APS
Supplemental Indenture No. 2 to Trust Indenture, Mortgage, Security Agreement and Assignment of Facility Lease, dated as of August 1, 1986, between State Street Bank and Trust Company, as successor to The First National Bank of Boston, as Owner Trustee, and Chemical Bank, as Lease Indenture Trustee4.4 to APS’s 1992 Form 10-K Report, File No. 1-44733/30/1993
99.499.3c
Pinnacle West

APS
Assignment, Assumption and Further Agreement, dated as of August 1, 1986, between APS and State Street Bank and Trust Company, as successor to The First National Bank of Boston, as Owner Trustee28.3 to APS’s Form 18 Registration Statement, File No. 33-948010/24/1986
99.4a99.3(a)c
Pinnacle West

APS
Amendment No. 1, dated as of November 1, 1986, to Assignment, Assumption and Further Agreement, dated as of August 1, 1986, between APS and State Street Bank and Trust Company, as successor to The First National Bank of Boston, as Owner Trustee10.10 to APS’s September 30, 1986 Form 10-Q Report by means of Amendment No. l on December 3, 1986 Form 8, File No. 1-447312/4/1986

Exhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: 99.3(b)ac
Date Filed
99.4bc
Pinnacle West

APS
Amendment No. 2, dated as of March 17, 1993, to Assignment, Assumption and Further Agreement, dated as of August 1, 1986, between APS and State Street Bank and Trust Company, as successor to The First National Bank of Boston, as Owner Trustee28.6 to APS’s 1992 Form 10-K Report, File No. 1-44733/30/1993
99.599.4
Pinnacle West

APS
Participation Agreement, dated as of December 15, 1986, among PVGS Funding Report Corp., Inc., State Street Bank and Trust Company, as successor to The First National Bank of Boston, in its individual capacity and as Owner Trustee, Chemical Bank, in its individual capacity and as Indenture Trustee under a Trust Indenture, APS, and the Owner Participant named therein28.2 to APS’s September 30, 1992 Form 10-Q Report, File No. 1-447311/9/1992
223

99.5aExhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
99.4(a)Pinnacle West

APS
Amendment No. 1, dated as of August 1, 1987, to Participation Agreement, dated as of December 15, 1986, among PVGS Funding Corp., Inc. as Funding Corporation, State Street Bank and Trust Company, as successor to The First National Bank of Boston, as Owner Trustee, Chemical Bank, as Indenture Trustee, APS, and the Owner Participant named therein28.20 to APS’s Form 18 Registration Statement No. 33-9480 by means of a November 6, 1986 Form 8-K Report, File No. 1-44738/10/1987
99.5b99.4(b)
Pinnacle West

APS
Amendment No. 2, dated as of March 17, 1993, to Participation Agreement, dated as of December 15, 1986, among PVGS Funding Corp., Inc., PVGS II Funding Corp., Inc., State Street Bank and Trust Company, as successor to The First National Bank of Boston, in its individual capacity and as Owner Trustee, Chemical Bank, in its individual capacity and as Indenture Trustee, APS, and the Owner Participant named therein28.5 to APS’s 1992 Form 10-K Report, File No. 1-44733/30/1993
99.699.5
Pinnacle West

APS
Trust Indenture, Mortgage Security Agreement and Assignment of Facility Lease, dated as of December 15, 1986, between State Street Bank and Trust Company, as successor to The First National Bank of Boston, as Owner Trustee, and Chemical Bank, as Indenture Trustee10.2 to APS’s November 18, 1986 Form 10-K Report, File No. 1-44731/20/1987
99.6a99.5(a)
Pinnacle West

APS
Supplemental Indenture No. 1, dated as of August 1, 1987, to Trust Indenture, Mortgage, Security Agreement and Assignment of Facility Lease, dated as of December 15, 1986, between State Street Bank and Trust Company, as successor to The First National Bank of Boston, as Owner Trustee, and Chemical Bank, as Indenture Trustee4.13 to APS’s Form 18 Registration Statement No. 33-9480 by means of August 1, 1987 Form 8-K Report, File No. 1-44738/24/1987

Exhibit
No.
99.5(b)
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
99.6b
Pinnacle West

APS
Supplemental Indenture No. 2 to Trust Indenture Mortgage, Security Agreement and Assignment of Facility Lease, dated as of December 15, 1986, between State Street Bank and Trust Company, as successor to The First National Bank of Boston, as Owner Trustee, and Chemical Bank, as Lease Indenture Trustee4.5 to APS’s 1992 Form 10-K Report, File No. 1-44733/30/1993
99.799.6
Pinnacle West

APS
Assignment, Assumption and Further Agreement, dated as of December 15, 1986, between APS and State Street Bank and Trust Company, as successor to The First National Bank of Boston, as Owner Trustee10.5 to APS’s November 18, 1986 Form 8-K Report, File No. 1-44731/20/1987
224

99.7aExhibit
No.
Registrant(s)Description
Previously Filed as Exhibit: a
Date Filed
99.6(a)Pinnacle West

APS
Amendment No. 1, dated as of March 17, 1993, to Assignment, Assumption and Further Agreement, dated as of December 15, 1986, between APS and State Street Bank and Trust Company, as successor to The First National Bank of Boston, as Owner Trustee28.7 to APS’s 1992 Form 10-K Report, File No. 1-44733/30/1993
99.899.7c
Pinnacle West

APS
Indemnity Agreement dated as of March 17, 1993 by APS28.3 to APS’s 1992 Form 10-K Report, File No. 1-44733/30/1993
99.999.8
Pinnacle West

APS
Extension Letter, dated as of August 13, 1987, from the signatories of the Participation Agreement to Chemical Bank28.20 to APS’s Form 18 Registration Statement No. 33-9480 by means of a November 6, 1986 Form 8-K Report, File No. 1-44738/10/1987
99.1099.9Pinnacle West
APS
Pinnacle West
APS
10.2 to APS’s September 30, 1999 Form 10-Q Report, File No. 1-447311/15/1999
99.1199.10Pinnacle West99.5 to Pinnacle West/APS June 30, 2005 Form 10-Q Report, File Nos. 1-8962 and 1-44738/9/2005
101.SCH
Pinnacle West

APS
XBRL Taxonomy Extension Schema Document
101.CAL
Pinnacle West

APS
XBRL Taxonomy Extension Calculation Linkbase Document
101.LAB
Pinnacle West

APS
XBRL Taxonomy Extension Label Linkbase Document
101.PRE
Pinnacle West

APS
XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF
Pinnacle West

APS
XBRL Taxonomy Definition Linkbase Document
aReports filed under File No. 1-4473 and 1-8962 were filed in the office of the Securities and Exchange CommissionSEC located in Washington, D.C.
 

bManagement contract or compensatory plan or arrangement to be filed as an exhibit pursuant to Item 15(b) of Form 10-K.
 
cAn additional document, substantially identical in all material respects to this Exhibit, has been entered into, relating to an additional Equity Participant.  Although such additional document may differ in other respects (such as dollar amounts, percentages, tax indemnity matters, and dates of execution), there are no material details in which such document differs from this Exhibit.
 
dAdditional agreements, substantially identical in all material respects to this Exhibit have been entered into with additional persons.  Although such additional documents may differ in other respects (such as dollar amounts and dates of execution), there are no material details in which such agreements differ from this Exhibit.
 
eFurnished herewith as an Exhibit.

225


ITEM 16.  FORM 10-K SUMMARY

None.
226

SIGNATURES
 
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
 
PINNACLE WEST CAPITAL CORPORATION
(Registrant)
PINNACLE WEST CAPITAL CORPORATION
(Registrant)
Date: February 21, 202027, 2023/s/ Jeffrey B. Guldner
(Jeffrey B. Guldner, Chairman of

the Board of Directors, President and

Chief Executive Officer)
 
Power of Attorney
 
We, the undersigned directors and executive officers of Pinnacle West Capital Corporation, hereby severally appoint Theodore N. GeislerAndrew Cooper and Robert E. Smith, and each of them, our true and lawful attorneys with full power to them and each of them to sign for us, and in our names in the capacities indicated below, any and all amendments to this Annual Report on Form 10-K filed with the Securities and Exchange Commission.
 
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.
 
SignatureTitleDate
SignatureTitleDate
/s/ Jeffrey B. GuldnerPrincipal Executive OfficerFebruary 21, 202027, 2023
(Jeffrey B. Guldner, Chairmanand Director
of the Board of Directors, President
and Chief Executive Officer)
/s/ Theodore N. GeislerPrincipal Financial OfficerFebruary 21, 2020
(Theodore N. Geisler,
Senior Vice President and
Chief Financial Officer)
/s/ Elizabeth A. BlankenshipPrincipal Accounting OfficerFebruary 21, 2020
(Elizabeth A. Blankenship,
Vice President, Controller and
Chief Accounting Officer)

/s/ Denis A. Cortese, M.D.DirectorFebruary 21, 2020
(Denis A. Cortese, M.D.)/s/ Andrew CooperPrincipal Financial OfficerFebruary 27, 2023
(Andrew Cooper,
Senior Vice President and
Chief Financial Officer)
/s/ Elizabeth A. BlankenshipPrincipal Accounting OfficerFebruary 27, 2023
(Elizabeth A. Blankenship,
Vice President, Controller and
Chief Accounting Officer)
227

/s/ Glynis A. BryanDirectorFebruary 27, 2023
(Glynis A. Bryan)
/s/ Richard P. FoxDirectorFebruary 21, 202027, 2023
(Richard P. Fox)
/s/ Michael L. GallagherDirectorFebruary 21, 2020
(Michael L. Gallagher)
/s/ Dale E. Klein, Ph.D.Ph. D.DirectorFebruary 21, 202027, 2023
(Dale E. Klein, Ph.D.)
/s/ Humberto S. LopezGonzalo A. de la Melena, Jr.DirectorFebruary 21, 202027, 2023
(Humberto S. Lopez)Gonzalo A. de la Melena, Jr.)
/s/ Kathryn L. MunroDirectorFebruary 21, 202027, 2023
(Kathryn L. Munro)
/s/ Bruce J. NordstromDirectorFebruary 21, 202027, 2023
(Bruce J. Nordstrom)
/s/ Paula J. SimsDirectorFebruary 21, 202027, 2023
(Paula J. Sims)
/s/ William H. SpenceDirectorFebruary 27, 2023
(William H. Spence)
/s/ James E. Trevathan, Jr.DirectorFebruary 21, 202027, 2023
(James E. Trevathan)Trevathan, Jr.)
/s/ David P. WagenerDirectorFebruary 21, 202027, 2023
(David P. Wagener)

228

SIGNATURES
 
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
 
ARIZONA PUBLIC SERVICE COMPANY
(Registrant)
 Date: February 21, 202027, 2023
/s/ Jeffrey B. Guldner
(Jeffrey B. Guldner, Chairman of

the Board of Directors and

Chief Executive Officer)
 

Power of Attorney
 
We, the undersigned directors and executive officers of Arizona Public Service Company, hereby severally appoint Theodore N. GeislerAndrew Cooper and Robert E. Smith, and each of them, our true and lawful attorneys with full power to them and each of them to sign for us, and in our names in the capacities indicated below, any and all amendments to this Annual Report on Form 10-K filed with the Securities and Exchange Commission.
 
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.
 
SignatureTitleDate
/s/ Jeffrey B. GuldnerPrincipal Executive OfficerFebruary 27, 2023
(Jeffrey B. Guldner, Chairmanand Director
of the Board of Directors and
Chief Executive Officer)
/s/ Andrew CooperPrincipal Financial OfficerFebruary 27, 2023
(Andrew Cooper,
Senior Vice President and
Chief Financial Officer)
/s/ Elizabeth A. BlankenshipPrincipal Accounting OfficerFebruary 27, 2023
(Elizabeth A. Blankenship
Vice President, Controller and
Chief Accounting Officer)
229

SignatureTitleDate
/s/ Glynis A. BryanDirectorFebruary 27, 2023
(Glynis A. Bryan)
/s/ Jeffrey B. GuldnerPrincipal Executive OfficerFebruary 21, 2020
(Jeffrey B. Guldner, Chairmanand Director
of the Board of Directors and
Chief Executive Officer)
/s/ Theodore N. GeislerPrincipal Financial OfficerFebruary 21, 2020
(Theodore N. Geisler,
Senior Vice President and
Chief Financial Officer)
/s/ Elizabeth A. BlankenshipPrincipal Accounting OfficerFebruary 21, 2020
(Elizabeth A. Blankenship
Vice President, Controller and
Chief Accounting Officer)

/s/ Denis A. Cortese, M.D.DirectorFebruary 21, 2020
(Denis A. Cortese, M.D.)
/s/ Richard P. FoxDirectorFebruary 21, 202027, 2023
(Richard P. Fox)
/s/ Michael L. GallagherDirectorFebruary 21, 2020
(Michael L. Gallagher)
/s/ Dale E. Klein, Ph.D.Ph. D.DirectorFebruary 21, 202027, 2023
(Dale E. Klein, Ph.D.)
/s/ Humberto S. LopezGonzalo A. de la Melena, Jr.DirectorFebruary 21, 202027, 2023
(Humberto S. Lopez)Gonzalo A. de la Melena, Jr.)
/s/ Kathryn L. MunroDirectorFebruary 21, 202027, 2023
(Kathryn L. Munro)
/s/ Bruce J. NordstromDirectorFebruary 21, 202027, 2023
(Bruce J. Nordstrom)
/s/ Paula J. SimsDirectorFebruary 21, 202027, 2023
(Paula J. Sims)
/s/ William H. SpenceDirectorFebruary 27, 2023
(William H. Spence)
/s/ James E. Trevathan, Jr.DirectorFebruary 21, 202027, 2023
(James E. Trevathan)Trevathan, Jr.)
/s/ David P. WagenerDirectorFebruary 21, 202027, 2023
(David P. Wagener)


209
230