BN
| Burlington Northern | 2 |
BNSF
| BNSF Railway | 8 |
CNW
| Chicago & Northwestern | 2 |
CRDX
| Chicago Freight Car Leasing Company | 2 |
HZGX
| Herzog Contracting Corporation | 34 |
IAIS
| Iowa Interstate | 2 |
KCS
| Kansas City Southern | 4 |
SI
| Union Pacific Railroad Company (Spokane International) | 38 |
SP
| Southern Pacific | 2 |
UP
| Union Pacific Railroad Company | 21 |