Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series005 - Pacific Coast Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2004 - Railroad tracks
- Subseries Level 3001 - Railroad mainline
- ItemWWAPC0336 - Railroad mainlines at Seattle, Washington in 1927.
- ItemWWAPC0337 - Railroad mainlines at Seattle, Washington in 1927.
- ItemWWAPC0345 - Railroad mainlines at Black River Jct., Washington, circa 1990.
- ItemWWAPC0350 - Pacific Coast Railroad/Chicago Milwaukee St. Paul and Pacific Railroad mainline at Renton, Washington in November 1945.
- ItemWWAPC0355 - Pacific Coast Railroad/Milwaukee Road mainling at Renton, Washington, circa 1940.
- 21 more...