Railroad Archives Online
- CollectionD0036 - George Werkema Collection
- Series001 - Burlington Northern Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2003 - Railroads--Buildings and Structures
- Subseries Level 3001 - Bridges
- ItemWerkema554 - Burlington Northern Green River Bridge near Auburn, Washington, in 1973. Washington State Route 18 highway bridge in the background.
- ItemWerkema555 - Burlington Northern bridge on the Nooksack River at Deming, Washington, in 2001.
- ItemWerkema556 - Burlington Northern Yakima River bridge east of Easton, Washington, in 1987.
- ItemWerkema557 - Burlington Northern Yakima River bridge east of Easton, Washington, in 1987.
- ItemWerkema558 - Burlington Northern Yakima River bridge east of Easton, Washington, in 1987.
- ItemWerkema559 - Burlington Northern Yakima River bridge east of Easton, Washington, in 1987.
- ItemWerkema560 - Burlington Northern Yakima River bridge east of Easton, Washington, in 1987.
- 12 more...