ATSF
| Atchison Topeka & Santa Fe | 3 |
BKTY
| Union Pacific Railroad Company | 1 |
BN
| Burlington Northern | 2 |
CBRW
| Columbia Basin Railroad | 1 |
CIC
| Cedar Rapids & Iowa City | 2 |
CNW
| Chicago & Northwestern | 22 |
CR
| Conrail | 1 |
CRDX
| Chicago Freight Car Leasing Company | 4 |
DME
| Dakota, Minnesota and Eastern | 1 |
DRGW
| Denver & Rio Grande Western | 1 |
EL
| Erie Lackawanna | 1 |
HZGX
| Herzog Contracting Corporation | 4 |
IAIS
| Iowa Interstate | 4 |
KCS
| Kansas City Southern | 3 |
MILW
| Milwaukee Road | 1 |
MRL
| Montana Rail Link | 2 |
NS
| Norfolk Southern | 1 |
PC
| Penn Central | 1 |
SOO
| Soo Line | 2 |
SPMW
| Southern Pacific Maintenance of Way | 1 |
UP
| Union Pacific Railroad Company | 2 |