| Heartland Industrial Services | Collinsville,IL 62234 | (618) 491-8100 | |
| Middendorf and Reuss Construct | Freeburg,IL 62243 | (618) 476-9393 | (618) 476-9663 |
| Korte & Luitjohan Contractors, | Highland,IL 62249 | (618) 654-9877 | (618) 654-9778 |
| J & L Robinson Development & C | Carbondale,IL 62901 | (618) 549-3391 | (618) 457-4324 |
| IMPACT Strategies, Inc. | Fairview Heights,IL 62208 | (618) 394-8400 | |
| Litteken Construction Company | Breese,IL 62230 | (618) 526-2174 | (618) 526-4042 |
| Pfund Construction | Edwardsville,IL 62025-6702 | (618) 692-9502 | |
| Fulk Construction Inc. | Brownstown,IL 62418 | (618) 427-3662 | |
| Ross Construction, Inc. | Marion,IL 62959 | (618) 993-5904 | (618) 993-5624 |
| Shores Builders, Inc. | Centralia,IL 62801 | (618) 532-3997 | (618) 532-9719 |
| Holland Construction Services, | Swansea,IL 62226 | (618) 277-8870 | (618) 277-6823 |
| Central Rubber Extrusions of I | Highland,IL 62249 | (618) 654-1171 | (618) 654-7453 |