| Calhoun Construction, Inc. | Belleville,IL 62223-3037 | (618) 398-0633 | (618) 398-0896 |
| Wissinger Construction, Inc. | Cairo,IL 62914 | (618) 734-2689 | |
| Negwer Materials, Inc. | Saint Louis,MO 63135 | (314) 522-0579 | (314) 522-1613 |
| WWCS, Inc. | Cottage Hills,IL 62018 | (618) 258-1222 | (618) 258-1444 |
| JB Construction & Design, L.L. | Belleville,IL 62221 | (618) 616-8444 | |
| Harold O'Shea Builders | Springfield,IL 62711 | (217) 522-2826 | (888) 930-2009 |
| Von Alst Operating, L.L.C. | Swansea,IL 62226-1100 | (618) 234-0477 | (618) 234-8219 |