ATSF
| Atchison Topeka & Santa Fe | 3 |
BAP
| Butte Anaconda & Pacific | 1 |
BN
| Burlington Northern | 1 |
CN
| Canadian National Railways | 1 |
CP
| Canadian Pacific Railway | 2 |
DRGW
| Denver & Rio Grande Western | 1 |
KCC
| KCC | 1 |
KCCX
| Kennecott Utah Copper Corporation | 6 |
MILW
| Milwaukee Road | 5 |
NN
| Northern Nevada Railroad Corporation | 3 |
OHIO
| OHIO | 1 |
RARW
| Rarus Railway Company | 1 |
SP
| Southern Pacific | 2 |
SPMW
| Southern Pacific Maintenance of Way | 1 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
STMA
| St. Maries River Railroad Company | 10 |
UP
| Union Pacific Railroad Company | 2 |