Railroad Archives Online
- CollectionD0197 - Maple Valley Historical Society Collection
- Series002 - Chicago, Milwaukee, St. Paul, and Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2003 - Railroads--Buildings and Structures
- Subseries Level 3001 - Bridges
- ItemP1985.121.01-014 - Columbia and Puget Sound Railroad bridge at Maple Valley, Washington, in 1911.
- ItemP1985.124.01-016 - Chicago, Milwaukee and Puget Sound Railroad bridge at Maple Valley, Washington, in 1911.