BCMX
| Bullet Concrete Materials Company | 1 |
CBQ
| Chicago Burlington & Quincy | 6 |
DMIR
| Duluth Missabe & Iron Range | 205 |
IMRR
| Illinois Midland Railroad | 5 |
LSRC
| Lake State Railway Company | 21 |
OLDX
| Old Line Holding Company Incorporated | 1 |
SPSX
| Progress Rail Services Corp | 1 |