Railroad Archives Online
- CollectionD0197 - Maple Valley Historical Society Collection
- Series004 - Pacific Coast Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2003 - Railroads--Buildings and Structures
- Subseries Level 3001 - Railroad bridges
- ItemP1986.91.01-022 - Pacific Coast Railroad bridge at Maple Valley, Washington, circa 1946.
- ItemP2000.06.03-036 - Pacific Coast Railroad bridge at Maple Valley, Washington, circa 1935 .