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
- 100 more...
- ItemWWASPSL8-102 - Spokane, Portland, and Seattle (SP&S) Youngs Bay Trestle at Astoria, Oregon, circa 1910
- ItemWWASPSL8-103 - Spokane, Portland, and Seattle (SP&S) Youngs Bay Trestle at Astoria, Oregon, circa 1910
- ItemWWASPSL8-157 - Spokane, Portland, and Seattle (SP&S) Trestle near Astoria, Oregon, undated
- ItemWWASPSL8-159 - Spokane, Portland, and Seattle (SP&S) Bridge near Astoria, Oregon, undated
- ItemWWASPSL9-075 - Trestle Work, Washington, undated
- ItemWWASPSL9-077 - Spokane, Portland, and Seattle (SP&S) Steam Locomotive, White Salmon River, Washington, undated
- ItemWWASPSL8-104 - Spokane, Portland, and Seattle (SP&S) Diesel Locomotive with Freight Train at Astoria, Oregon, undated
- ItemWWASPSL8-105 - Spokane, Portland, and Seattle (SP&S) Diesel Locomotive with Freight Train at Astoria, Oregon, undated