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
- 3736 more...
- ItemBB033763 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Top Chord, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033764 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - End Posts, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033765 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Lower Chord, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033766 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Lower Chord, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033767 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Posts, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033768 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Posts, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033769 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Posts, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033770 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Tower Posts, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033771 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Struts and Diagonal, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- 173 more...