| Business Name | Address | |
| Engelstad Electric | 1215 S Dakota St Milbank, SD 57252 |
 |
| Whetstone Valley Elec Co-Op | E Highway 12 Milbank, SD 57252 |
|
| Allied Service | 301 W 3rd Ave Milbank, SD 57252 |
|
| KENS Electric | 514 High St Big Stone City, SD 57216 |
|
| Dupont Electric Inc | 419 4th St SW Watertown, SD 57201 |
|