ATSF
| Atchison Topeka & Santa Fe | 2 |
BNSF
| BNSF Railway | 16 |
CRYX
| Cryo-Trans Incorporated | 4 |
DRGW
| Denver & Rio Grande Western | 3 |
GARX
| General American Marks Company | 1 |
MP
| Missouri Pacific | 2 |
SSW
| St Louis Southwestern (Cotton Belt) | 2 |
UP
| Union Pacific Railroad Company | 1 |