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 3003 - Maintenance Facilities
- 2 more...
- ItemWWASPSL1-053 - Spokane, Portland, and Seattle (SP&S) Hoyt Street Roundhouse, Portland, Oregon, 1944
- ItemWWASPSL1-054 - Spokane, Portland, and Seattle (SP&S) Hoyt Street Roundhouse Turntable, Portland, Oregon, undated
- ItemWWASPSL1-056 - Spokane, Portland, and Seattle (SP&S) Hoyt Street Roundhouse, Portland, Oregon, undated
- ItemWWASPSL3-088 - Spokane, Portland, and Seattle (SP&S) Roundhouse at Vancouver, Washington, September 9, 1956
- ItemWWASPSL3-089 - Spokane, Portland, and Seattle (SP&S) Roundhouse at Vancouver, Washington, September 9, 1956
- ItemWWASPSL3-092 - Spokane, Portland, and Seattle (SP&S) Machine Shop at Vancouver, Washington, undated
- ItemWWASPSL3-093 - Spokane, Portland, and Seattle (SP&S) Machine Shop at Vancouver, Washington, undated
- ItemWWASPSL3-094 - Spokane, Portland, and Seattle (SP&S) Machine Shop at Vancouver, Washington, undated
- ItemWWASPSL5-071 - Spokane, Portland, and Seattle (SP&S) Overhead View of Engine House and Yard at Fallbridge, Washington (later Wishram), undated
- 3 more...