BN
| Burlington Northern | 5 |
CP
| Canadian Pacific Railway | 1 |
CSX
| CSX Railroad | 1 |
DRGW
| Denver & Rio Grande Western | 2 |
GTW
| Grand Trunk Western | 2 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 1 |
NS
| Norfolk Southern | 4 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
TINX
| Trinity Railcar | 2 |
UP
| Union Pacific Railroad Company | 4 |