BN
| Burlington Northern | 1 |
CGW
| Chicago Great Western | 1 |
CNW
| Chicago & Northwestern | 2 |
CRIP
| Chicago Rock Island & Pacific | 2 |
DH
| Delaware & Hudson | 1 |
GN
| Great Northern | 1 |
IC
| Illinois Central | 1 |
MILW
| Milwaukee Road | 2 |
NP
| Northern Pacific | 1 |
STMA
| St. Maries River Railroad Company | 1 |