| Business Name | Address | |
| Tippery Mechanical Contractors | 2617 Orchard St Waterloo, IA 50702 |
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| Black Hawk Electrical Co | 1507 Commercial St Waterloo, IA 50702 |
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| Paulson Electric Co | 1915 Jefferson St Waterloo, IA 50702 |
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| W & J Electric Svc | 1502 Jefferson St Waterloo, IA 50702 |
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| Scott's Electric Inc | 2072 Howard Ave Waterloo, IA 50702 |
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