Exhibit 21
BLACK HILLS CORPORATION
SUBSIDIARIES
December 31, 2011
Subsidiary Name | State of Origin | BHC's Ownership | Description of Subsidiary's Authorized Capital Stock, if not wholly owned | |
1. | Black Hills Cabresto Pipeline, LLC | Delaware | 100% | N/A |
2. | Black Hills/Colorado Electric Utility Company, LP | Delaware | 100% | N/A |
3. | Black Hills/Colorado Gas Utility Company, LP | Delaware | 100% | N/A |
4. | Black Hills/Colorado Utility Company, LLC | Colorado | 100% | N/A |
5. | Black Hills/Colorado Utility Company II, LLC | Colorado | 100% | N/A |
6. | Black Hills Colorado IPP, LLC | South Dakota | 100% | N/A |
7. | Black Hills Electric Generation, LLC | South Dakota | 100% | N/A |
8. | Black Hills Exploration and Production, Inc. | Wyoming | 100% | N/A |
9. | Black Hills Gas Resources, Inc. | Colorado | 100% | N/A |
10. | Black Hills Gas Holdings Corp. | Colorado | 100% | N/A |
11. | Black Hills/Iowa Gas Utility Company, LLC | Delaware | 100% | N/A |
12. | Black Hills/Kansas Gas Utility Company, LLC | Kansas | 100% | N/A |
13. | Black Hills Midstream, LLC | South Dakota | 100% | N/A |
14. | Black Hills/Nebraska Gas Utility Company, LLC | Delaware | 100% | N/A |
15. | Black Hills Non-regulated Holdings, LLC | South Dakota | 100% | N/A |
16. | Black Hills Plateau Production, LLC | Delaware | 100% | N/A |
17. | Black Hills Power, Inc. | South Dakota | 100% | N/A |
18. | Black Hills Service Company, LLC | South Dakota | 100% | N/A |
19. | Black Hills Utility Holdings, Inc. | South Dakota | 100% | N/A |
20. | Black Hills Wyoming, LLC | Wyoming | 100% | N/A |
21. | Buick Power, LLC | Delaware | 50% | BHC indirectly owns 50% of the outstanding Membership Units |
22. | Cheyenne Light, Fuel and Power Company | Wyoming | 100% | N/A |
23. | EIF Investors, Inc. | Delaware | 100% | N/A |
24. | Enserco Energy Inc. | South Dakota | 100% | N/A |
25. | Enserco Midstream, LLC | South Dakota | 100% | N/A |
26. | Generation Development Company, LLC | South Dakota | 100% | N/A |
27. | Mallon Oil Company, Sucursal Costa Rica | Costa Rica | 100% | N/A |
28. | Natural/Peoples Limited Liability Company | Wyoming | 50% | BHC indirectly owns 50% of the outstanding Membership Units |
29. | Wyodak Resources Development Corp. | Delaware | 100% | N/A |