| Company Name | Address | City | State | Zip Code | Phone Number | Fax Number |
| ALDRIDGE ELECTRIC INC | 844 E ROCKLAND RD | LIBERTYVILLE | IL | 60048 | (847) 247-5214 | (847) 680-5233 |
| CABO CONSTRUCTION CORP | 1270 S KOSTNER AVE | CHICAGO | IL | 60623 | (773) 521-2226 | (773) 521-2223 |
| CONSTRUCT CONNECT | 30 TECHNOLOGY PKWY S, STE 100 | NORCROSS | GA | 30092 | (800) 364-2059 | (866) 570-8187 |
| DATABID | 433 PENN ST | NEWTOWN | PA | 18940 | (888) 929-3282 | (888) 929-9293 |
| DELTA INSTITUTE | 35 E WACKER DRIVE, STE 1200 | CHICAGO | IL | 60601 | (312) 377-7700 | (312) 268-6294 |
| DUNNET BAY CONSTRUCTION | 115 N BRANDON DR | GLENDALE HTS | IL | 60139 | (630) 539-1200 | (630) 539-4171 |
| E R BAKEY INC | 180 S WESTERN AVE, #158 | CARPENTERSVILLE | IL | 60110 | (847) 464-5700 | (847) 464-5727 |
| E80 PLUS CONSTRUCTORS | 7120 PATTON RD | DEFOREST | WI | 53532 | (608) 846-1880 | (608) 846-2225 |
| HANDS-OFF PROPERTY MGMT | 441 W 79TH ST, STORE 101 | CHICAGO | IL | 60620 | (773) 420-3379 | (773) 891-1727 |
| HARBOUR CONTRACTORS INC | 23830 W MAIN ST | PLAINFIELD | IL | 60544 | (815) 254-5500 | (815) 254-5505 |
| IHC CONSTRUCTION CO LLC | 385 AIRPORT RD, STE 100 | ELGIN | IL | 60123 | (847) 742-1516 | (847) 742-6610 |
| II IN ONE CONTRACTORS INC | 4344 W 45TH ST | CHICAGO | IL | 60632 | (773) 847-2100 | (773) 847-4501 |
| INTEGRATED ENVIRONMENTAL | 13435 KOLMAR AVE | CRESTWOOD | IL | 60445 | (708) 926-9588 | (708) 926-9251 |
| KEE CONSTRUCTION LLC | 11002 S WHIPPLE | CHICAGO | IL | 60655 | (312) 513-5727 | (312) 513-5727 |
| KIEWIT INFRASTRUCTURE CO | TWO PIERCE PL, STE 1600 | ITASCA | IL | 60143 | (773) 458-1250 | (773) 458-1342 |
| MCGRAW-HILL CONSTRUCTION | 1333 BURR RIDGE PKWY | BURR RIDGE | IL | 60527 | (630) 520-0421 | (630) 286-8211 |
| MICHELS FOUNDATIONS A DIVISION OF | 2816 SYLVANIA AVE | FRANKSVILLE | WI | 53126 | (262) 824-2800 | (262) 732-4249 |
| MIDWEST MOLE INC | 6814 W 350 N | GREENFIELD | IN | 46140 | (317) 545-1335 | (317) 545-1558 |
| MISFITS CONSTRUCTION COMPANY | PO BOX 803663, 233 S WACKER DR, STE | CHICAGO | IL | 60606 | (312) 420-5041 | (206) 339-3613 |
| NORTH AMERICA PROCUREMENT COUNCIL | P O BOX 40445 | GRAND JUNCTION | CO | 81504 | (302) 450-1923 | (302) 450-1925 |
| PATRICK ENGINEERING INC | 4970 VARSITY DR | LISLE | IL | 60532 | (630) 795-7200 | (630) 795-7284 |
| PRIME VENDOR INC | 4622 CEDAR AVE, BLDG 5, STE 123 | WILMINGTON | NC | 28403-6916 | (800) 746-9554 | (910) 726-1973 |
| RAILWORKS TRACK SERVICES INC | 512 TWIN RAIL DR, STE 400 | MINOOKA | IL | 60447 | (815) 521-3340 | (815) 521-3344 |
| RHINEHART RAILROAD CONSTRUCTION INC | PO BOX 809 | FALLSTON | MD | 21047 | (215) 219-5100 | (609) 541-2300 |
| SPAAN TECH INC | 311 S WACKER DR, STE 2400 | CHICAGO | IL | 60606 | (312) 277-8800 | (999) 999-9999 |
| SUPERIOR CONSTRUCTION | 1455 LOUIS SULLIVAN DR | PORTAGE | IN | 46368 | (219) 787-0850 | (219) 763-9998 |
| SWANSON CONTRACTING CO INC | 11701 S MAYFIELD | ALSIP | IL | 60803 | (708) 388-0623 | (708) 388-9986 |
| THORNTON EQUIPMENT SERVICE INC | 500 THORNHOUSE CR | NEW LENOX | IL | 60451 | (708) 479-7531 | (708) 479-7591 |
| TRACK SERVICE INC | 810 W AVE "H" | GRIFFITH | IN | 46319 | (219) 924-2304 | (219) 924-2541 |
| WITECH EXCAVATING | 25353 S STATE ST | CRETE | IL | 60417 | (708) 367-1250 | (708) 367-1245 |
| WOOLPERT INC | 1815 S MEYERS RD | OAKBROOK TERRACE | IL | 60181 | (630) 424-9080 | (630) 495-3731 |