BNSF
| BNSF Railway | 40 |
CN
| Canadian National Railways | 1 |
GREX
| Georgetown Rail Equipment Company | 3 |
GTC
| GTC | 5 |
LMIX
| Loram Maintenance of Way Inc. | 1 |
NWP
| Northwestern Pacific Railroad Company | 1 |
SPMW
| Southern Pacific Maintenance of Way | 1 |
UP
| Union Pacific Railroad Company | 12 |
UPP
| Union Pacific Passenger | 1 |