| Business Name | Address | |
| Proefrock Electric Inc | 410 Meckling St Gayville, SD 57031 |
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| Brian's Electric & Trenching | 800 E 11th St Yankton, SD 57078 |
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| Drotzmann Electric | 623 Augusta Cir Yankton, SD 57078 |
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| Dykstra Electric Inc | 1603 Locust St Yankton, SD 57078 |
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| List Electric | 2711 Pine St Yankton, SD 57078 |
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