ATSF
| Atchison Topeka & Santa Fe | 1 |
BN
| Burlington Northern | 31 |
BNSF
| BNSF Railway | 76 |
CN
| Canadian National Railways | 3 |
CP
| Canadian Pacific Railway | 2 |
GN
| Great Northern | 1 |
GREX
| Georgetown Rail Equipment Company | 6 |
HZGX
| Herzog Contracting Corporation | 5 |
IC
| Illinois Central | 2 |
KCS
| Kansas City Southern | 2 |
MRL
| Montana Rail Link | 10 |
PSAP
| Puget Sound and Pacific Railroad Company | 1 |
SP
| Southern Pacific | 2 |
SRS
| Sperry Rail Service | 3 |
STMA
| St. Maries River Railroad Company | 1 |
SVRY
| SVRY | 1 |
UP
| Union Pacific Railroad Company | 25 |
USAX
| United States Army | 1 |