ADCX
| Adolph Coors | 2 |
ARMN
| Union Pacific Railroad Company | 31 |
BNSF
| BNSF Railway | 4 |
CRYX
| Cryo-Trans Incorporated | 7 |
CS
| Colorado & Southern | 1 |
DRGW
| Denver & Rio Grande Western | 2 |
REX
| Railway Express Agency, Inc. | 2 |
SLC
| San Luis Central Railroad Company | 1 |
TILX
| Trinity Industries Leasing Company | 2 |
WCLX
| Wilson Car Lines | 1 |