ATSF
| Atchison Topeka & Santa Fe | 2 |
CNW
| Chicago & Northwestern | 1 |
CTIE
| Kansas City Southern Railway Company | 2 |
DRGW
| Denver & Rio Grande Western | 2 |
MP
| Missouri Pacific | 3 |
NS
| Norfolk Southern | 1 |
PC
| Penn Central | 1 |
SOU
| Southern | 2 |
UP
| Union Pacific Railroad Company | 1 |
WP
| Western Pacific | 2 |