ATSF
| Atchison Topeka & Santa Fe | 4 |
BLE
| Bessemer & Lake Erie | 2 |
BN
| Burlington Northern | 4 |
BNSF
| BNSF Railway | 3 |
CNW
| Chicago & Northwestern | 1 |
CR
| Conrail | 1 |
CSX
| CSX Railroad | 1 |
HS
| H and S Railroad Company | 1 |
IAIS
| Iowa Interstate | 18 |
ICG
| Illinois Central Gulf | 2 |
MP
| Missouri Pacific | 2 |
SP
| Southern Pacific | 1 |
WC
| Wisconsin Central | 1 |