AO
| Appalachian & Ohio | 1 |
ATSF
| Atchison Topeka & Santa Fe | 15 |
BN
| Burlington Northern | 16 |
CBQ
| Chicago Burlington & Quincy | 4 |
CGW
| Chicago Great Western | 2 |
FWD
| Fort Worth & Denver | 1 |
GN
| Great Northern | 3 |
GWWR
| Gateway Western | 2 |
KCS
| Kansas City Southern | 9 |
KCT
| Kansas City Terminal | 2 |
MKT
| Missouri-Kansas-Texas | 10 |
MP
| Missouri Pacific | 11 |
SJGI
| SJGI | 1 |
SLSF
| Saint Louis-San Francisco | 1 |
TPW
| Toledo Peoria & Western | 1 |
UP
| Union Pacific Railroad Company | 3 |
WAB
| Wabash | 3 |