AOK
| Arkansas-Oklahoma Railroad | 1 |
ATSF
| Atchison Topeka & Santa Fe | 3 |
BN
| Burlington Northern | 3 |
BNSF
| BNSF Railway | 5 |
CNW
| Chicago & Northwestern | 1 |
FTSX
| Fairmont Tamper | 2 |
KCS
| Kansas City Southern | 3 |
MP
| Missouri Pacific | 8 |
SP
| Southern Pacific | 1 |
SPMW
| Southern Pacific Maintenance of Way | 5 |
SPSX
| Progress Rail Services Corp | 1 |
UP
| Union Pacific Railroad Company | 11 |