ATSF
| Atchison Topeka & Santa Fe | 4 |
BN
| Burlington Northern | 14 |
CBQ
| Chicago Burlington & Quincy | 2 |
DRGW
| Denver & Rio Grande Western | 7 |
DSL
| Denver & Salt Lake | 2 |
MILW
| Milwaukee Road | 2 |
MP
| Missouri Pacific | 1 |
SP
| Southern Pacific | 24 |
UP
| Union Pacific Railroad Company | 12 |
UPP
| Union Pacific Passenger | 8 |