Railroad Archives Online
- CollectionD0027 - Timothy Miller Collection
- Series007 - Spokane, Portland, and Seattle Railway
- Subseries Level 1009 - Engineering Records
- Subseries Level 2008 - Physical plant drawing
- Subseries Level 3001 - Bridges
- 2413 more...
- ItemBB031240 - Spokane, Portland and Seattle Railway Engineering Drawing: Soundings, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB031241 - Spokane, Portland and Seattle Railway Engineering Drawing: Soundings, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB031242 - Spokane, Portland and Seattle Railway Engineering Drawing: Wedge Rail Lock/Motor, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB031243 - Spokane, Portland and Seattle Railway Engineering Drawing: End Bearings, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB031244 - Spokane, Portland and Seattle Railway Engineering Drawing: General Elevations, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, 1907
- ItemBB031245 - Spokane, Portland and Seattle Railway Engineering Drawing: General Elevations, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, 1907
- ItemBB031246 - Spokane, Portland and Seattle Railway Engineering Drawing: General Elevations, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, 1907
- ItemBB031247 - Spokane, Portland and Seattle Railway Engineering Drawing: General Elevations, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, 1907
- ItemBB031248 - Spokane, Portland and Seattle Railway Engineering Drawing: General Elevations, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, 1907
- 1496 more...