AOK
| Arkansas-Oklahoma Railroad | 6 |
ATW
| Atlantic and Western | 2 |
BCOL
| Canadian National Railways | 1 |
BNSF
| BNSF Railway | 2 |
BR
| Buffalo and Pittsburgh | 1 |
CN
| Canadian National Railways | 1 |
CSX
| CSX Railroad | 6 |
GAEX
| General American Marks Company | 1 |
GNRR
| Georgia Northeastern | 4 |
NOKL
| Northwestern Oklahoma | 2 |
SOO
| Soo Line | 2 |
TTZX
| TTX Company-Centerbeam Flats | 6 |
UCRY
| Utah Central | 1 |