BKTY
| Union Pacific Railroad Company | 3 |
BNSF
| BNSF Railway | 1 |
CGW
| Chicago Great Western | 2 |
CSX
| CSX Railroad | 1 |
DRGW
| Denver & Rio Grande Western | 1 |
MILW
| Milwaukee Road | 2 |
MKT
| Missouri-Kansas-Texas | 4 |
MP
| Missouri Pacific | 1 |
NW
| Norfolk & Western | 1 |
TP
| Texas & Pacific | 1 |