| Federal Steel and Erection Co. | East Alton,IL 62024 | (618) 254-0106 | (618) 251-2713 |
| Harold O'Shea Builders | Springfield,IL 62711 | (217) 522-2826 | (888) 930-2009 |
| Energy Culvert Company, L.L.C. | Energy,IL 62933 | (618) 942-7381 | (618) 942-7834 |
| Negwer Materials, Inc. | Saint Louis,MO 63135 | (314) 522-0579 | (314) 522-1613 |
| Professional Metal Works, L.L. | Freeburg,IL 62243 | (618) 539-2214 | (618) 539-2216 |
| Tru-Bilt Farm and Commercial B | Marion,IL 62959-0185 | (888) 878-2458 | (618) 767-6190 |
| Rednour Steel Erectors, Inc. | Cutler,IL 62238-0116 | (618) 497-8302 | (618) 497-2292 |