| 618 Civil Contracting, L.L.C. | Centralia,IL 62801 | (618) 339-4377 | |
| Helmkamp Construction Company | East Alton,IL 62024 | (618) 251-2600 | |
| Limbaugh Construction Co., Inc | Granite City,IL 62040-6607 | (618) 931-3170 | (618) 931-3344 |
| Poettker Construction Company | Breese,IL 62230 | (618) 526-7213 | (618) 526-7654 |
| Kinney Contractors, Inc. | Raymond,IL 62560 | (217) 229-3322 | (217) 229-3609 |
| McCarthy Building Companies, I | Collinsville,IL 62234 | (618) 344-4142 | |
| Tarlton Corporation | St. Louis,MO 63110 | (314) 633-3300 | (314) 647-1940 |
| Triangle Enterprises, Inc. | Paducah,KY 42001-9111 | (270) 443-2424 | (270) 444-4994 |
| Millennium Construction, L.L.C | Lebanon,IL 62254 | (618) 806-9009 | (618) 622-0784 |
| H & N Construction, Inc. | Steeleville,IL 62288-0187 | (618) 965-9299 | (618) 965-9579 |
| G.S. & S. Construction | Brentwood,MO 63144 | (314) 298-8100 | (314) 298-8129 |
| Contegra Construction Company, | Edwardsville,IL 62025 | (618) 931-3500 | (618) 931-3535 |