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
- 3668 more...
- ItemBB033695 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Stringers and Frames, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033696 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Floor Beams, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033697 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - End Floor Beams, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033698 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Top Chords, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033699 - Spokane, Portland and Seattle Railway Engineering Drawing: Fixed Span, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, 1968
- ItemBB033700 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - End Posts, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033701 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Lower Chords, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033702 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Portal, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033703 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Top Laterals, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- 241 more...