Railroad Archives Online
- CollectionD0197 - Maple Valley Historical Society Collection
- Series004 - Pacific Coast Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2004 - Railroad tracks
- Subseries Level 3001 - Railroad mainline
- ItemP2000.06.01-033 - Pacific Coast Railroad track at Maple Valley, Washington, circa 1955.
- ItemP2000.06.02-034 - Pacific Coast Railroad track at Maple Valley, Washington, circa 1955.
- ItemP2008.05.16-040 - Pacific Coast Railroad track at Maple Valley, Washington, circa 1955.
- ItemP2015.06.34-067 - Pacific Coast Railroad railroad track at Renton, Washington in 1945.