ATS
| ATS | 2 |
ATSF
| Atchison Topeka & Santa Fe | 1 |
BN
| Burlington Northern | 4 |
BNSF
| BNSF Railway | 23 |
BTC
| Birmingham Terminal | 1 |
CNW
| Chicago & Northwestern | 1 |
HZGX
| Herzog Contracting Corporation | 4 |
MILW
| Milwaukee Road | 1 |
NP
| Northern Pacific | 1 |
PNWR
| Portland and Western Railroad Incorporat | 1 |
SPMW
| Southern Pacific Maintenance of Way | 11 |
SSWM
| SSWM | 1 |
UP
| Union Pacific Railroad Company | 8 |
UPMW
| UPMW | 1 |
UPP
| Union Pacific Passenger | 1 |
WPRR
| Willamette and Pacific | 3 |