AOK
| Arkansas-Oklahoma Railroad | 1 |
ATSF
| Atchison Topeka & Santa Fe | 1 |
BN
| Burlington Northern | 3 |
BNSF
| BNSF Railway | 5 |
CN
| Canadian National Railways | 1 |
COER
| Crab Orchard & Egyptian | 1 |
CSP
| Camas Prairie RailNet Incorporated | 1 |
CSX
| CSX Railroad | 4 |
DWC
| Canadian National Railways | 1 |
MRL
| Montana Rail Link | 2 |
TR
| Tomahawk Railway L.P. | 1 |
WIIX
| Williamette Industries Incorporated | 1 |
WREX
| Western Railroad Equipment Company | 1 |