MDU RESOURCES GROUP, INC.
List of Subsidiaries
(effective December 31, 2021)
Subsidiaries | Jurisdiction of Formation | ||||
Alaska Basic Industries, Inc. | Alaska | ||||
Ames Sand & Gravel, Inc. | North Dakota | ||||
Anchorage Sand and Gravel Company, Inc. | Alaska | ||||
ARC Fabricators, L.L.C. | South Dakota | ||||
Baldwin Contracting Company, Inc. | California | ||||
Bell Electrical Contractors, Inc. | Missouri | ||||
Bombard Electric, LLC | Nevada | ||||
Bombard Mechanical, LLC | Nevada | ||||
Capital Electric Construction Company, Inc. | Kansas | ||||
Capital Electric Line Builders, Inc. | Kansas | ||||
Cascade Natural Gas Corporation | Washington | ||||
Centennial Energy Holdings, Inc. | Delaware | ||||
Centennial Holdings Capital LLC | Delaware | ||||
Central Oregon Redi-Mix, LLC | Oregon | ||||
Concrete, Inc. | California | ||||
Connolly-Pacific Co. | California | ||||
D S S Company | California | ||||
Desert Fire Holdings, Inc. | Nevada | ||||
Desert Fire Protection, a Nevada Limited Partnership | Nevada | ||||
Desert Fire Protection, Inc. | Nevada | ||||
Desert Fire Protection, LLC | Nevada | ||||
Duro Electric Company | Colorado | ||||
E & ER Company | South Dakota | ||||
Ellis & Eastern Company | South Dakota | ||||
E.S.I., Inc. | Ohio | ||||
Fairbanks Materials, Inc. | Alaska | ||||
Fidelity Exploration & Production Company | Delaware | ||||
Frebco, Inc. | Ohio | ||||
FutureSource Capital Corp. | Delaware | ||||
Granite City Ready Mix, Inc. | Minnesota | ||||
Hawaiian Cement | Hawaii | ||||
Intermountain Gas Company | Idaho | ||||
International Line Builders, Inc. | Delaware | ||||
InterSource Insurance Company | Vermont | ||||
Jebro Incorporated | Iowa | ||||
JTL Group, Inc. (Montana corporation) | Montana | ||||
JTL Group, Inc. (Wyoming corporation) | Wyoming | ||||
Kent’s Oil Service | California |
Knife River Corporation | Delaware | ||||
Knife River Corporation - Mountain West | Delaware | ||||
Knife River Corporation – North Central | Minnesota | ||||
Knife River Corporation – Northwest | Oregon | ||||
Knife River Corporation – South | Texas | ||||
Knife River Dakota, Inc. | Delaware | ||||
Knife River Hawaii, Inc. | Delaware | ||||
Knife River Marine, Inc. | Delaware | ||||
Knife River Midwest, LLC | Delaware | ||||
KRC Holdings, Inc. | Delaware | ||||
Lone Mountain Excavation & Utilities, LLC | Nevada | ||||
Loy Clark Pipeline Co. | Oregon | ||||
LTM, Incorporated | Oregon | ||||
MDU Construction Services Group, Inc. | Delaware | ||||
MDU Energy Capital, LLC | Delaware | ||||
MDU Industrial Services, Inc. | Delaware | ||||
MDU United Construction Solutions, Inc. | Delaware | ||||
Montana-Dakota Utilities Co. | Delaware | ||||
Nevada Solar Solutions, LLC | Delaware | ||||
Northstar Materials, Inc. | Minnesota | ||||
OEG, Inc. | Oregon | ||||
PerLectric, Inc. | Virginia | ||||
Prairie Cascade Energy Holdings, LLC | Delaware | ||||
Prairie Intermountain Energy Holdings, LLC | Delaware | ||||
Rail to Road, Inc. | South Dakota | ||||
Rocky Mountain Contractors, Inc. | Montana | ||||
Sweetman Const. Co. | South Dakota | ||||
USI Industrial Services, Inc. | Delaware | ||||
Wagner Group, Inc., The | Delaware | ||||
Wagner-Smith Company, The | Ohio | ||||
Wagner-Smith Equipment Co. | Delaware | ||||
WBI Canadian Pipeline, Ltd. | Canada | ||||
WBI Energy Midstream, LLC | Colorado | ||||
WBI Energy Transmission, Inc. | Delaware | ||||
WBI Energy, Inc. | Delaware | ||||
WBI Holdings, Inc. | Delaware | ||||
WHC, Ltd. | Hawaii |