Exhibit 21
BLACK HILLS CORPORATION SUBSIDIARIES
December 31, 2018
Subsidiary Name | State of Origin | |
1. | Black Hills Cabresto Pipeline, LLC | Delaware |
2. | Black Hills Colorado Electric, LLC * | Delaware |
3. | Black Hills Colorado Gas, Inc. * | Colorado |
4. | Black Hills Colorado IPP, LLC * | South Dakota |
5. | Black Hills Colorado Wind, LLC | Delaware |
6. | Black Hills Electric Generation, LLC * | South Dakota |
7. | Black Hills Energy Arkansas, Inc. * | Arkansas |
8. | Black Hills Energy Services Company * | Colorado |
9. | Black Hills Exploration and Production, Inc. * | Wyoming |
10. | Black Hills Gas, Inc. | Delaware |
11. | Black Hills Gas, LLC | Delaware |
12. | Black Hills Gas Distribution, LLC * | Delaware |
13. | Black Hills Gas Holdings, LLC | Delaware |
14. | Black Hills Gas Parent Holdings II, Inc. | Delaware |
15. | Black Hills Gas Resources, Inc. * | Colorado |
16. | Black Hills/Iowa Gas Utility Company, LLC * | Delaware |
17. | Black Hills/Kansas Gas Utility Company, LLC * | Kansas |
18. | Black Hills Midstream, LLC | South Dakota |
19. | Black Hills/Nebraska Gas Utility Company, LLC * | Delaware |
20. | Black Hills Non-regulated Holdings, LLC | South Dakota |
21. | Black Hills Northwest Wyoming Gas Utility Company, LLC * | Wyoming |
22. | Black Hills Plateau Production, LLC * | Delaware |
23. | Black Hills Power, Inc. * | South Dakota |
24. | Black Hills Service Company, LLC * | South Dakota |
25. | Black Hills Shoshone Pipeline, LLC * | Wyoming |
26. | Black Hills Utility Holdings, Inc. * | South Dakota |
27. | Black Hills Wyoming, LLC | Wyoming |
28. | Cheyenne Light, Fuel and Power Company * | Wyoming |
29. | Generation Development Company, LLC | South Dakota |
30. | Mallon Oil Company, Sucursal Costa Rica | Costa Rica |
31. | N780BH, LLC | South Dakota |
32. | Rocky Mountain Natural Gas LLC * | Colorado |
33. | Wyodak Resources Development Corp. * | Delaware |
* doing business as Black Hills Energy