BN
| Burlington Northern | 4 |
BNSF
| BNSF Railway | 3 |
CBQ
| Chicago Burlington & Quincy | 1 |
CNW
| Chicago & Northwestern | 2 |
CS
| Colorado & Southern | 1 |
DRGW
| Denver & Rio Grande Western | 2 |
LGEX
| L.G. Everist Incorporated | 1 |
MP
| Missouri Pacific | 4 |
NW
| Norfolk & Western | 1 |
OLB
| Omaha Lincoln and Beatrice Railway Company | 5 |
RWSX
| Scherer Electric Generating Facility (Ala.) | 1 |