Subsidiary Name

State of Origin

1.

Black Hills Colorado Electric, LLC *

Delaware

2.

Black Hills Colorado Gas, Inc. *

Colorado

3.

Black Hills Colorado IPP, LLC *

South Dakota

4.

Black Hills Colorado Wind, LLC

Delaware

5.

Black Hills Electric Generation, LLC *

South Dakota

6.

Black Hills Electric Parent Holdings, LLC

South Dakota

7.

Black Hills Energy Arkansas, Inc. *

Arkansas

8.

Black Hills Energy Renewable Resources, LLC

South Dakota

9.

Black Hills Energy Services Company *

Colorado

10.

Black Hills Exploration and Production, Inc. *

Wyoming

11.

BHERR Holdings, LLC

South Dakota

12.

Black Hills Gas, Inc.

Delaware

13.

Black Hills Gas, LLC

Delaware

14.

Black Hills Gas Holdings, LLC

Delaware

15.

Black Hills Gas Parent Holdings II, Inc.

Delaware

16.

Black Hills Gas Resources, Inc. *

Colorado

17.

Black Hills/Iowa Gas Utility Company, LLC *

Delaware

18.

Black Hills/Kansas Gas Utility Company, LLC *

Kansas

19.

Black Hills Nebraska Gas, LLC *

Delaware

20.

Black Hills Non-regulated Holdings, LLC

South Dakota

21.

Black Hills Plateau Production, LLC *

Delaware

22.

Black Hills Power, Inc. *

South Dakota

23.

Black Hills Service Company, LLC *

South Dakota

24.

Black Hills Shoshone Pipeline, LLC *

Wyoming

25.

Black Hills Utility Holdings, Inc. *

South Dakota

26.

Black Hills Wyoming, LLC

Wyoming

27.

Black Hills Wyoming Gas, LLC *

Wyoming

28.

Cheyenne Light, Fuel and Power Company *

Wyoming

29.

Mallon Oil Company, Sucursal Costa Rica

Costa Rica

30.

N780BH, LLC

South Dakota

31.

Rocky Mountain Natural Gas LLC *

Colorado

32.

Wyodak Resources Development Corp. *

Delaware