AOK
| Arkansas-Oklahoma Railroad | 1 |
BN
| Burlington Northern | 2 |
BNSF
| BNSF Railway | 4 |
CSX
| CSX Railroad | 1 |
CW
| Colorado and Wyoming | 5 |
MP
| Missouri Pacific | 1 |
MRL
| Montana Rail Link | 36 |
RFRX
| Rick Franklin Corporation | 1 |
SBD
| Seaboard System | 1 |
UP
| Union Pacific Railroad Company | 1 |
WTCX
| Weyerhauser | 2 |