ATSF
| Atchison Topeka & Santa Fe | 8 |
BN
| Burlington Northern | 3 |
BNSF
| BNSF Railway | 4 |
CNW
| Chicago & Northwestern | 1 |
DME
| Dakota, Minnesota and Eastern | 3 |
GREX
| Georgetown Rail Equipment Company | 9 |
GWWR
| Gateway Western | 2 |
HVSR
| Hocking Valley Scenic | 2 |
HZGX
| Herzog Contracting Corporation | 21 |
IAIS
| Iowa Interstate | 2 |
KCS
| Kansas City Southern | 7 |
MP
| Missouri Pacific | 1 |
MRYM
| Monticello Railway Museum | 1 |
SP
| Southern Pacific | 1 |
SPMW
| Southern Pacific Maintenance of Way | 13 |
UP
| Union Pacific Railroad Company | 60 |
WP
| Western Pacific | 1 |