BN
| Burlington Northern | 1 |
CRIP
| Chicago Rock Island & Pacific | 2 |
DRGW
| Denver & Rio Grande Western | 5 |
KCS
| Kansas City Southern | 2 |
KMC
| KMC | 1 |
MP
| Missouri Pacific | 5 |
SLSF
| Saint Louis-San Francisco | 1 |
SP
| Southern Pacific | 4 |
UP
| Union Pacific Railroad Company | 17 |
UTAH
| Utah Railway | 2 |