| Business | Phone |
| International Assoc-Machinists 16282 Highway 34, West Burlington 52655 | (319) 754-5753 |
| Iron Workers 16452 Highway 34, West Burlington 52655 | (319) 752-6951 |
| Operating Engineers 16452 Highway 34, West Burlington 52655 | (319) 754-8135 |
| Teamsters Union 16452 Highway 34, West Burlington 52655 | (319) 752-2723 |