ATSF
| Atchison Topeka & Santa Fe | 2 |
BNSF
| BNSF Railway | 10 |
BO
| Baltimore & Ohio | 8 |
CBQ
| Chicago Burlington & Quincy | 10 |
CNW
| Chicago & Northwestern | 9 |
CRIP
| Chicago Rock Island & Pacific | 11 |
MILW
| Milwaukee Road | 7 |
MP
| Missouri Pacific | 1 |
PRR
| Pennsylvania Railroad | 2 |
SOO
| Soo Line | 2 |
UP
| Union Pacific Railroad Company | 9 |