AMTK
| Amtrak | 5 |
BN
| Burlington Northern | 4 |
CNW
| Chicago & Northwestern | 6 |
CSX
| CSX Railroad | 1 |
DRGW
| Denver & Rio Grande Western | 2 |
GWWR
| Gateway Western | 2 |
MP
| Missouri Pacific | 12 |
PC
| Penn Central | 3 |
SP
| Southern Pacific | 1 |
UP
| Union Pacific Railroad Company | 13 |
WP
| Western Pacific | 1 |