Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series007 - Spokane, Portland, and Seattle Railway
- Subseries Level 1014 - Photographs
- Subseries Level 2004 - Railroad tracks
- Subseries Level 3001 - Railroad mainline
- 14 more...
- ItemWWASPSL4-066 - Spokane, Portland, and Seattle (SP&S) Mainline at Lyle, Washington, undated
- ItemWWASPSL6-032 - Spokane, Portland, and Seattle (SP&S) Track Washout, Washington State, undated
- ItemWWASPSL6-033 - Spokane, Portland, and Seattle (SP&S) Track Washout, Washington State, undated
- ItemWWASPSL6-034 - Spokane, Portland, and Seattle (SP&S) Track Washout, Washington State, undated
- ItemWWASPSL6-035 - Spokane, Portland, and Seattle (SP&S) Track Washout, Washington State, undated
- ItemWWASPSL7-005 - Spokane, Portland, and Seattle (SP&S) Mainline near Snake River Junction, Washington, undated
- ItemWWASPSL7-011 - Spokane, Portland, and Seattle (SP&S) Mainline, Washington State, undated
- ItemWWASPSL7-032 - Spokane, Portland, and Seattle (SP&S) Mainline and Siding, Washington State, undated
- ItemWWASPSL8-022 - Spokane, Portland, and Seattle (SP&S) Mainline at Goble, Oregon, July 1968
- 14 more...