| Business | Phone |
| West River Electric Assn 3250 E Highway 44, Rapid City 57703 | (605) 393-1500 |
| Black Hills Power 409 Deadwood Ave, Rapid City 57702 | (605) 721-3200 |
| Rushmore Electric Power Co-Op 1715 Cambell St, Rapid City 57701 | (605) 342-4759 |
| Montana-Dakota Utilities Co 718 Steele Ave, Rapid City 57701 | (605) 342-0160 |