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 3001 - Bridges
- ItemWWASPSL1-017 - Spokane, Portland, and Seattle (SP&S) Willamette River Bridges, Portland, Oregon, undated
- ItemWWASPSL1-018 - Spokane, Portland, and Seattle (SP&S) Doane's Lake Trestle, Portland, Oregon, July 12, 1906
- ItemWWASPSL1-075 - Spokane, Portland, and Seattle (SP&S) Willamette River Bridge, Willbridge, Oregon, April 7, 1908
- ItemWWASPSL1-076 - Spokane, Portland, and Seattle (SP&S) Willamette River Bridge, East Saint Johns, Oregon, March 8, 1908
- ItemWWASPSL1-077 - Spokane, Portland, and Seattle (SP&S) Willamette River Bridge, East Saint Johns, Oregon, May 8, 1912
- ItemWWASPSL1-078 - Spokane, Portland, and Seattle (SP&S) Willamette River Bridge, East Saint Johns, Oregon, undated
- ItemWWASPSL1-079 - Spokane, Portland, and Seattle (SP&S) Willamette River Bridge, East Saint Johns, Oregon, November 9, 1909
- 101 more...