AOK
| Arkansas-Oklahoma Railroad | 2 |
ATSF
| Atchison Topeka & Santa Fe | 2 |
ATW
| Atlantic and Western | 1 |
BCOL
| Canadian National Railways | 2 |
CLC
| Columbia and Cowlitz Railway Company | 1 |
CN
| Canadian National Railways | 3 |
DWC
| Canadian National Railways | 1 |
IC
| Illinois Central | 1 |
MSRC
| Kansas City Southern | 1 |
NOKL
| Northwestern Oklahoma | 3 |
SERA
| Sierra Northern Railway | 1 |
SRY
| Southern Railway of British Columbia Lim | 1 |
TR
| Tomahawk Railway L.P. | 2 |
TTZX
| TTX Company-Centerbeam Flats | 5 |
UP
| Union Pacific Railroad Company | 3 |
WC
| Wisconsin Central | 2 |