| Business Name | Address | |
| Whetstone Valley Elec Co-Op | E Highway 12 Milbank, SD 57252 |
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| KENS Electric | 514 High St Big Stone City, SD 57216 |
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| Lundberg Electric | 410 3rd Ave S Clear Lake, SD 57226 |
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| Dockter's Electric | 2715 Sioux Conifer Rd Watertown, SD 57201 |
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| Miller Electric Inc | 601 4th St SW Watertown, SD 57201 |
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