ATSF
| Atchison Topeka & Santa Fe | 2 |
BN
| Burlington Northern | 2 |
CNW
| Chicago & Northwestern | 3 |
CP
| Canadian Pacific Railway | 1 |
GN
| Great Northern | 1 |
MILW
| Milwaukee Road | 2 |
NYC
| New York Central | 2 |
SOO
| Soo Line | 1 |
SP
| Southern Pacific | 2 |
UP
| Union Pacific Railroad Company | 1 |
WP
| Western Pacific | 1 |