ATSF
| Atchison Topeka & Santa Fe | 5 |
BN
| Burlington Northern | 4 |
BNSF
| BNSF Railway | 2 |
CNW
| Chicago & Northwestern | 3 |
DME
| Dakota, Minnesota and Eastern | 1 |
GREX
| Georgetown Rail Equipment Company | 1 |
HZGX
| Herzog Contracting Corporation | 2 |
IAIS
| Iowa Interstate | 1 |
NLRX
| NLRX | 1 |