BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 8 |
CNW
| Chicago & Northwestern | 3 |
CRDX
| Chicago Freight Car Leasing Company | 2 |
DRGW
| Denver & Rio Grande Western | 2 |
HZGX
| Herzog Contracting Corporation | 45 |
IAIS
| Iowa Interstate | 2 |
KCS
| Kansas City Southern | 3 |
MKT
| Missouri-Kansas-Texas | 1 |
SI
| Union Pacific Railroad Company (Spokane International) | 26 |
SP
| Southern Pacific | 5 |
UP
| Union Pacific Railroad Company | 30 |