BCOL
| Canadian National Railways | 1 |
BN
| Burlington Northern | 55 |
BNSF
| BNSF Railway | 3 |
BO
| Baltimore & Ohio | 1 |
CBQ
| Chicago Burlington & Quincy | 9 |
CN
| Canadian National Railways | 1 |
CR
| Conrail | 1 |
LN
| Louisville & Nashville | 3 |
MILW
| Milwaukee Road | 3 |
MRL
| Montana Rail Link | 3 |
NLR
| NLR | 1 |
NP
| Northern Pacific | 4 |
SBD
| Seaboard System | 1 |
SI
| Union Pacific Railroad Company (Spokane International) | 1 |
TMBL
| Tacoma Municipal Belt Line Railway | 1 |
UP
| Union Pacific Railroad Company | 1 |
WP
| Western Pacific | 4 |