Railroad Archives Online
- CollectionD0197 - Maple Valley Historical Society Collection
- Series002 - Chicago, Milwaukee, St. Paul, and Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2004 - Railroad tracks
- Subseries Level 3001 - Railroad mainline
- ItemP2000.06.03-035 - Chicago Milwaukee St. Paul and Pacific Railroad track at Maple Valley, Washington, circa 1955.