ATSF
| Atchison Topeka & Santa Fe | 7 |
BN
| Burlington Northern | 26 |
BNSF
| BNSF Railway | 9 |
CWW
| CWW | 4 |
DODX
| Department Of Defense | 3 |
MH
| Mount Hood Railroad | 2 |
MP
| Missouri Pacific | 1 |
MRL
| Montana Rail Link | 3 |
NP
| Northern Pacific | 1 |
SI
| Union Pacific Railroad Company (Spokane International) | 1 |
SIRR
| Southern Industrial Railroad | 1 |
SP
| Southern Pacific | 1 |
SPS
| Spokane Portland & Seattle | 1 |
UP
| Union Pacific Railroad Company | 9 |
WPRR
| Willamette and Pacific | 1 |