| Business Name | Address | |
| Walla Walla Electric | 1225 W Poplar St Walla Walla, WA 99362 |
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| Hays Electric | 23 E Whitman Dr College Place, WA 99324 |
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| Hi-Way Electric Inc | 110 NE Rose St College Place, WA 99324 |
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| American Line Builders Inc | 246 Tucannon Rd Dayton, WA 99328 |
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| Columbia Rural Elec Assn Inc | 26401 Ice Harbor Dr Burbank, WA 99323 |
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