| May Excavating, Inc. | Carterville,IL 62918 | (239) 771-0191 | |
| Next Contracting | Freeburg,IL 62243 | (618) 910-9468 | |
| 618 Civil Contracting, L.L.C. | Centralia,IL 62801 | (618) 339-4377 | |
| Goodwin Brother's Construction | St. Louis,MO 63129 | (636) 931-6084 | (636) 931-6085 |
| Brewster Companies, Inc. | Maryville,IL 62062 | (618) 344-4468 | (618) 223-1887 |
| Bloomsdale Excavating Co., Inc | Bloomsdale,MO 63627 | (573) 483-2564 | (573) 483-9474 |
| Widman Construction, Inc. | Godfrey,IL 62035 | (618) 466-1036 | (618) 466-7984 |
| Barnhart Crane & Rigging | Madison,IL 62060 | (618) 451-6171 | |
| Tarlton Corporation | St. Louis,MO 63110 | (314) 633-3300 | (314) 647-1940 |
| Ron Hunsche Excavating, Inc. | Highland,IL 62249-1156 | (618) 654-4014 | (618) 654-6297 |
| Mott Excavating, Inc. | Vienna,IL 62995 | (618) 658-2605 | (618) 658-3214 |
| Luhr Crosby, L.L.C. | Columbia,IL 62236-0050 | (618) 281-4106 | (618) 281-4288 |
| Roadworks, L.L.C. | Marion,IL 62959 | (618) 922-8515 | (844) 842-8401 |
| Kaskaskia Engineering Group, L | Belleville,IL 62220 | (618) 233-5877 | (618) 233-5977 |
| Keeley & Sons, Inc. | East Saint Louis,IL 62201 | (618) 271-7470 | (618) 271-0830 |
| SAK Construction, L.L.C. | O'Fallon,MO 63366 | (636) 385-1000 | (636) 385-1100 |