AOK
| Arkansas-Oklahoma Railroad | 2 |
ARR
| Alaska Railroad | 1 |
ATSF
| Atchison Topeka & Santa Fe | 1 |
BN
| Burlington Northern | 2 |
CW
| Colorado and Wyoming | 1 |
DODX
| Department Of Defense | 3 |
DRGW
| Denver & Rio Grande Western | 1 |
GPSX
| Georgia-Pacific Corporation Eastern Wood Products Mfg.Divisi | 1 |
KRL
| Kasgro Rail Lines | 1 |
MP
| Missouri Pacific | 2 |
MTTX
| TTX Company | 4 |
NP
| Northern Pacific | 1 |
POTB
| Port of Tillamook Bay | 2 |
SJTX
| Stella Jones, Inc | 1 |
SSW
| St Louis Southwestern (Cotton Belt) | 2 |
TPDX
| TPDX | 1 |
UP
| Union Pacific Railroad Company | 1 |
UPMW
| UPMW | 1 |
WP
| Western Pacific | 2 |
WPRR
| Willamette and Pacific | 11 |