APA
| Apache Railway Company | 1 |
ARZC
| Arizona and California Railroad | 1 |
BM
| Boston & Maine | 1 |
CN
| Canadian National Railways | 5 |
CSX
| CSX Railroad | 3 |
DRGW
| Denver & Rio Grande Western | 1 |
KIWI
| KIWI | 1 |
UP
| Union Pacific Railroad Company | 6 |
WWEX
| Wood Waste Energy Incorporated | 2 |