| Company Name | Address | City | State | Zip Code | Phone Number | Fax Number |
| A5 RAIL LLC | 25420 KUYKENDAHL RD | TOMBALL | TX | 77375 | (708)620-7193 | (833)383-1382 |
| BIDNET | 20A RAILROAD AVE | ALBANY | NY | 12205 | (800) 677-1997 | (518) 438-0599 |
| BISON RAIL SYSTEMS | 1 VAIL LANE | FLEMINGTON | NJ | 08822 | (908) 642-4570 | (908) 284-1081 |
| CARRIER CORP | 7501 S QUINCY ST, STE 110 | WILLOWBROOK | IL | 60527 | (630) 516-3278 | (999) 999-9999 |
| CHICAGOLAND | PO BOX 3533 | PEORIA | IL | 61612 | (309) 401-6167 | (309) 401-6168 |
| DATABID | 433 PENN ST | NEWTOWN | PA | 18940 | (888) 929-3282 | (888) 929-9293 |
| DIVERGING APPROACH INC | 6623 RICHMOND RD, SUITE L | WILLIAMSBURG | VA | 23188 | (757) 220-2316 | (888) 724-8592 |
| DMP ENTERPRISES LLC, D/B/A DMP | 5858 S PRAIRIE, #3 | CHICAGO | IL | 60637 | (773) 619-1985 | (773) 619-1985 |
| ENGER-VAVRA INC | 3406 MARTENS ST | FRANKLIN PARK | IL | 60131 | (847) 306-2820 | (847) 678-4252 |
| ENVIRONMENTAL DESIGN INTERNATIONAL | 33 W MONROE ST, STE 1825 | CHICAGO | IL | 60603-5326 | (312) 345-8679 | (312) 345-0529 |
| GFL ENVIRONMENTAL SERVICES USA INC | 19701 S 97TH AVE | MOKENA | IL | 60448 | (708) 479-6900 | (708) 479-6890 |
| GRANITE CONSTRUCTION CO | 1011 E TOUHY AVE, STE 500 | DES PLAINES | IL | 60018 | (847) 919-8200 | (866) 736-9487 |
| GW PEOPLES CONTRACTING INC | 260 S REYNOLDS ST APT 1009 | ALEXANDRIA | VA | 22304 | (703)863-2466 | (703)853-2466 |
| HARBOUR CONTRACTORS INC | 23830 W MAIN ST | PLAINFIELD | IL | 60544 | (815) 254-5500 | (815) 254-5505 |
| JOHN BURNS CONSTRUCTION COMPANY LLC | 999 OAKMONT PLAZA DR, SUITE 400 | WESTMONT | IL | 60559 | (708) 326-3500 | (000) 000-0000 |
| KALETECH LLC | 3831 MCCOY DR, #109 | AURORA | IL | 60504 | (630) 853-2533 | (630) 604-2344 |
| KENNY CONSTRUCTION COMPANY | 2215 SANDERS RD, STE 400 | NORTHBROOK | IL | 60062 | (847) 309-1191 | (847) 272-5930 |
| K-FIVE CONSTRUCTION CORP | 999 OAKMONT PLAZA DR, STE 200 | WESTMONT | IL | 60559-5517 | (630) 257-5600 | (630) 257-6788 |
| KIEWIT INFRASTRUCTURE CO | TWO PIERCE PL, STE 1600 | ITASCA | IL | 60143 | (773) 458-1250 | (773) 458-1342 |
| MENARD INDUSTRIES LLC | 12052 HOMESTEAD RD | HOUSTON | TX | 77050 | (219) 308-0298 | (832) 550-2610 |
| MORRISON METALWELD PROCESS | 3685 STUTZ DR, SUITE 102 | CANFIELD | OH | 44406-9155 | (330) 702-5188 | (330) 702-5198 |
| NATIONAL ELECTRIC GATE CO | PO BOX 706 | POOLER | GA | 31322 | (912) 748-5090 | (912) 748-7542 |
| NORTH AMERICA PROCUREMENT COUNCIL | P O BOX 40445 | GRAND JUNCTION | CO | 81504 | (302) 450-1923 | (302) 450-1925 |
| PATRICK ENGINEERING INC | 55 E MONROE, STE 3450 | CHICAGO | IL | 60603 | (312) 201-7900 | (312) 220-0722 |
| RailWorks | 1600 W 13th St | Deer Park | TX | 77536 | (713)815-7800 | (713)815-7800 |
| RHINEHART RAILROAD CONSTRUCTION INC | PO BOX 809 | FALLSTON | MD | 21047 | (215) 219-5100 | (609) 541-2300 |
| Total Railroad LLC | 8413 Golfview Drive | Orland Park | IL | 60462 | (815)347-2451 | (815)347-2451 |
| TRACK SERVICE INC | 810 W AVE "H" | GRIFFITH | IN | 46319 | (219) 924-2304 | (219) 924-2541 |