ATSF
| Atchison Topeka & Santa Fe | 2 |
BNSF
| BNSF Railway | 1 |
CAEG
| Coffeen and Western | 2 |
HYWX
| Georgia Power Company | 1 |
MAXX
| MidAmerican Energy Company | 6 |
NRI
| Nebkota Railway Incorporated | 7 |
OLB
| Omaha Lincoln and Beatrice Railway Company | 3 |
OMAX
| Omaha Public Power District | 1 |
RWSX
| Scherer Electric Generating Facility (Ala.) | 5 |
TXUX
| TXU Electric | 3 |
UCEX
| Union Electric Company | 1 |