Joint News Release

[GRAPHIC OMITTED]

 For NCE:                                            For NSP:
 Media Relations:                                    Media Relations:
 (303) 294-8900                                      (612) 337-2167
 Investors:                                          Investors:
 Mike Pritchard                                      Richard Kolkman
 (303) 294-2588                                      (612) 330-6622
 www.ncenergies.com                                  www.nspco.com


For Immediate Release

                 NEW CENTURY ENERGIES AND NORTHERN STATES POWER
                                    TO MERGE

               MERGED COMPANY WELL POSITIONED IN RAPIDLY CHANGING
                               UTILITIES INDUSTRY

DENVER and  MINNEAPOLIS , March 25, 1999 - New Century  Energies  (NYSE:NCE) and
Northern States Power Co. (NYSE:NSP) today announced that they have entered into
a definitive merger agreement.

     "This merger  combines  two  well-managed,  mid-continent  electric and gas
companies in order to provide a strong platform for assuring  low-cost,  quality
service to the region  during a time of rapid  change in the utility  industry,"
said James J. Howard, president, chairman and CEO of Northern States Power Co.

     The merged  company will stretch  from Mexico to the Canadian  border,  and
also will

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have a strong global  presence,  with operations in the United Kingdom,  Central
Europe, Australia and South America. It will be headquartered in Minneapolis and
certain key business units or operations will be based in Wisconsin,  Denver and
Amarillo, Texas. The company will be named later.

     The merger is  expected  to be a  tax-free,  stock-for-stock  exchange  for
shareholders  of  both  companies,  and  to be  accounted  for as a  pooling  of
interests. NCE and NSP anticipate that the merger will be accretive in the first
full year and thereafter to both sets of  shareholders  assuming  realization of
anticipated net cost savings.  Upon completion,  holders of New Century Energies
stock will receive 1.55 shares of the merged company stock for each share of NCE
stock.  Each share of Northern  States Power stock will continue as one share of
the combined company.

     Howard  said,  "The  merger  prepares  the  combined  company for where the
industry  will be - an  environment  of customer  choice - rather than where the
industry is today. The merger is predicated on providing our customers continued
low-cost,  reliable energy while  maintaining  high levels of customer  service.
This  will be  extremely  important  to  customers  as the  utility  environment
continues to change."

     In addition,  Howard said the combined  companies  are committed to meeting
and exceeding environmental standards.

     Bill D. Helton, chairman and CEO of Denver-based New Century Energies said,
"The merger provides both the combined  company and its operating units with the
scale  necessary  to remain  competitive  in a changing  industry  marketplace."
Helton added that NSP and New Century are an excellent fit. "Our philosophies of
focusing on excellence in customer  service are the same; we both have succeeded
in keeping  our costs  among the  lowest in the  industry;  and our  strategies,
customer  base and utility  operations  are very  similar." He said the combined
company will "integrate two strong companies with similar customer  demographics
within a single region, creating more growth in shareholder value than would the
stand-alone  companies."  The companies said they expect the merger to result in
net cost savings of

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approximately  $1.1 billion in the first 10 years of operations.

     Wayne H. Brunetti,  vice chairman,  president and COO of New Century, said,
"We expect significant cost savings from the elimination of duplicate  programs,
greater purchasing efficiencies and streamlined business processes."

         "The company  intends to honor all existing union  contracts," he said.
"And we can achieve our target merger  savings while still  supporting our local
communities and continuing to offer the same excellent prices and service."

     Howard,  63, will serve as  chairman  of the holding  company for the first
full year of  operations.  Brunetti,  56, will be president and CEO upon closing
and will assume the responsibilities as chairman upon Howard's  retirement.  New
Century Energies' Helton,  60, will retire at the completion of the merger.  The
board will consist of an equal number of members from Northern  States Power and
New Century  Energies.  In the United  States,  the merged  company will serve 3
million  electricity   customers  and  approximately  1.5  million  natural  gas
customers in 12 states including Arizona, Colorado, Kansas, Michigan, Minnesota,
New Mexico, North Dakota, Oklahoma, South Dakota, Texas, Wisconsin, and Wyoming.
Internationally,  the company will serve about 2 million electric  customers and
400,000  natural gas  customers in the United  Kingdom.  Based on year-end  1998
capacity,  as a combined entity, the company will have total generating capacity
of 21,720 megawatts,  of which 15,133 is regulated in the United States. It also
will have 6,587 megawatts of  non-regulated  generation in the United States and
internationally,  including  operations in the United  Kingdom,  Central Europe,
Australia and South America.  Based on 1998 results,  the combined company would
have revenues of $6.4 billion,  earnings of $618.8  million and assets  totaling
approximately   $15.1  billion.   The  merger   requires  the  approval  by  the
shareholders  of the two  existing  holding  companies,  as well as  approval or
regulatory review by the Securities and Exchange Commission,  the Federal Energy
Regulatory Commission,  the Federal Trade Commission, the Department of Justice,
the Federal Communications Commission, the Nuclear Regulatory

                                      - 3 -






Commission,  and state  regulators in nine of the states currently served by the
two companies. The merger is expected to take from 12 to 18 months to complete.

     It is anticipated the holding  company will adopt the NCE dividend  payment
level, adjusted for the exchange ratio. Based on the exchange ratio of 1.55, the
pro forma  dividend for the merged  company will be $1.50 per share on an annual
basis, following completion of the merger. This maintains the dividend level for
NCE shareholders and provides a slight increase for NSP shareholders.

     Based on the number of common  shares  currently  outstanding,  New Century
Energies  shareholders  will own 54 percent of the common equity of the combined
company and Northern States Power shareholders will own 46 percent.  As of March
15,  New  Century  Energies  had  approximately   114.9  million  common  shares
outstanding,  and NSP had 153.1 million common shares outstanding.  Debt holders
and preferred  stockholders  will continue  with their  present  holdings  under
existing terms.

     SG Barr Devlin  served as financial  advisor to New Century  Energies,  and
Northern States Power was advised by The Blackstone Group.

     New Century Energies serves approximately 1.5 million electricity customers
and more than a million  natural gas customers in Colorado,  Texas,  New Mexico,
Wyoming, Kansas and Oklahoma. Its operating companies include Public Service Co.
of Colorado,  Southwestern  Public Service Co. and Cheyenne Light, Fuel & Power.
Wholly owned subsidiaries  include: New Century  International,  which owns a 50
percent  interest  in  Yorkshire  Electricity  in the  United  Kingdom;  Utility
Engineering,  which provides engineering,  design, construction,  management and
other  related  services to  utilities;  Quixx,  which  invests in and  develops
cogeneration and other energy-related projects;  Planergy, which provides energy
services to commercial and industrial customers; eprime, which is an unregulated
commodity marketing affiliate currently engaged in gas and electricity marketing
and trading.  Northern  States Power  provides  electricity to about 1.5 million
customers in portions of Minnesota,  Wisconsin,  North Dakota,  Michigan,  South
Dakota. It distributes  natural gas to more than 475,000 customers in Minnesota,
Wisconsin, North Dakota, Michigan and Arizona. Wholly owned subsidiaries include
NRG Energy, Inc., which operates and has ownership

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interests  in  non-regulated  energy  businesses  around the  world,  with major
projects in the United States, Germany and Australia. Other subsidiaries include
Viking Gas  Transmission  Company,  a natural gas transmission  company;  Energy
Masters International,  an energy service company;  Seren Innovations,  which is
building  communication  networks to deliver telephone,  cable TV and high-speed
Internet  and data  services  ; and  Eloigne  Company,  which has  interests  in
affordable housing projects.

     This press release includes  forward-looking  statements within the meaning
of Section 21E of the  Securities  Exchange Act of 1934.  These  forward-looking
statements  reflect  numerous  assumptions,  and  involve  a number of risks and
uncertainties.  Among the  factors  that could  cause  actual  results to differ
materially are: electric load and customer growth;  abnormal weather conditions;
economic  conditions  in  the  company's  service  territory;   fluctuations  in
energy-related  commodity  prices,  realization  of net cost savings in a timely
manner,  and other  uncertainties.  Other risk factors are detailed from time to
time in the two companies' SEC reports.


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                            Merger Facts at a Glance




                                               New Century               Northern States                 Combined
                                                Energies                    Power Co.
                                                                 

             Market value                    $4.446 billion              $4.175 billion               $8.621 billion
           (as of Mar. 24)
            Long-term debt                   $2.206 billion              $1.851 billion               $4.057 billion
           Trust/Preferred                    $294 million               $305.3 million               $599.3 million
       Revenue from electricity              $2.697 billion              $2.352 billion               $5.049 billion
           Revenue from gas                   $841 million                $457 million                $1.298 billion
            Total revenues                   $3.611 billion              $2.819 billion                $6.43 billion
            Total earnings                    $341,957,000                $276,825,000                 $618,782,000
      Earnings per share - basic                  $3.06                       $1.84                         N/A
         Earnings per share -                     $3.05
               diluted
             Total assets                     $7.7 billion                $7.4 billion                 $15.1 billion
        Electricity customers                   1,601,000                   1,459,000                    3,060,000
       (United States-current)
        Electricity customers                   2,080,000                                                2,080,000
           (International)
         Electricity capacity                7,984 megawatts             7,149 megawatts             15,133 megawatts
           (U.S. regulated)
         Electricity capacity                 247 megawatts             6,340 megawatts*             6,587 megawatts*
           (non-regulated)
          Miles of electric                      10,236                       6,843                       17,079
          transmission lines
        Natural gas customers                   1,057,000                    475,000                     1,532,000
        Miles of gas pipelines                   16,063                      10,573                       26,636
              Employees                           6,305                       7,455                       13,760
    Avg. retail electricity rates            5.4 cents/ kwh               5.9 cents/kwh
            States served                   Colorado, Kansas,          Arizona, Michigan,
                                               New Mexico,          Minnesota, South Dakota,
                                            Oklahoma, Texas,         North Dakota, Wisconsin
                                                 Wyoming



            (Based on 1998 year-end information, except where noted)

*Includes projects operating, under construction, or under contract, expected
 to close by 7/1/99

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