WSOR 6634
| Model | Build Date | Builder's Number | Prime Mover | Horsepower |
| SD18R | 12/59 | 25615 | 16-567D2 | 1800 |
Unit History:
Southern 2519 (Built as a model SD24)
Southern 6338
Precision National Corporation 1838 (Rebuilt by Morrison-Knudsen to an SD10)
C&NW 6634 (Designated SD18R)
WSOR 6634
6634 and 2003 switch the UW heating plant. (11/29/00)
