BN
| Burlington Northern | 2 |
BO
| Baltimore & Ohio | 1 |
CSX
| CSX Railroad | 85 |
DRGW
| Denver & Rio Grande Western | 7 |
HATX
| Helm Financial Corporation | 2 |
HZGX
| Herzog Contracting Corporation | 2 |
SPMW
| Southern Pacific Maintenance of Way | 1 |
UP
| Union Pacific Railroad Company | 9 |