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
- 6 more...
- ItemWerkema560 - Burlington Northern Yakima River bridge east of Easton, Washington, in 1987.
- ItemWerkema561 - Burlington Northern Yakima River bridge east of Easton, Washington, in 1987.
- ItemWerkema562 - Burlington Northern Yakima River bridge east of Easton, Washington, in 1987.
- ItemWerkema563 - Burlington Northern highway overpass at Kiona, Washington, in 1986.
- ItemWerkema564 - Burlington Northern Columbia River Bridge at Pasco, Washington, in 1981.
- ItemWerkema565 - Burlington Northern Columbia River Bridge at Pasco, Washington, in 1981.
- ItemWerkema566 - Burlington Northern Columbia River Bridge at Pasco, Washington, in 1981.
- ItemWerkema567 - Burlington Northern Yakima River bridge at Union Gap, Washington, in 2008.
- ItemWerkema568 - Burlington Northern Sheyenne River viaduct at Valley City, North Dakota, in 2003.
- 4 more...