| Business Name | Address | |
| Will Clark Electric | 19747 Porto Fino Rd Tuolumne, CA 95379 |
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| Gertz Electric Inc | 15818 Curtis Cir Sonora, CA 95370 |
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| Tri-Technic Inc | 55 W Stockton St Sonora, CA 95370 |
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| Baldwin Electric Co | 20690 Resort Rd Sonora, CA 95370 |
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| Barry Electric | 22240 Fortuna Mine Rd Sonora, CA 95370 |
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