Railroad Archives Online
- FondD0197 - Maple Valley Historical Society Collection
- Sorozat004 - Pacific Coast Railroad Company
- Alsorozat014 - Photographs
- 003 - Railroads--Buildings and Structures
- 004 - Railroads--Maintenance and repair
- IratdarabP2002.01.01-038 - Pacific Coast Railroad servicing facilities at Maple Valley, Washington, circa 1935.