BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 1 |
CP
| Canadian Pacific Railway | 1 |
DODX
| Department Of Defense | 4 |
DRGW
| Denver & Rio Grande Western | 2 |
HTTX
| TTX Company | 1 |
IDOX
| U.S. Dept. of Energy Idaho Operations Office | 3 |
ITTX
| TTX Company | 4 |
MTTX
| TTX Company | 1 |
QUAX
| Redstreak, LLC | 2 |
SOO
| Soo Line | 1 |
SSW
| St Louis Southwestern (Cotton Belt) | 17 |
TEXX
| TEXX | 6 |
TPDX
| TPDX | 7 |