Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series007 - Spokane, Portland, and Seattle Railway
- Subseries Level 1014 - Photographs
- Subseries Level 2003 - Railroads--Buildings and Structures
- Subseries Level 3010 - Miscellaneous Structures
- ItemWWASPSL1-006 - Riverfront at Portland, Oregon, undated
- ItemWWASPSL1-008 - Rivergate Industrial Park at Portland, Oregon, undated
- ItemWWASPSL1-009 - Portland, Oregon, January 1950
- ItemWWASPSL1-013 - Portland, Oregon, undated
- ItemWWASPSL1-015 - Portland, Oregon, undated
- ItemWWASPSL2-001 - East Vancouver, Washington, undated
- ItemWWASPSL2-058 - Bonneville Dam, North Bonneville, Washington, undated
- ItemWWASPSL2-074 - Stevenson, Washington, undated
- 75 more...