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
- 3766 more...
- ItemBB033793 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Drum Segments, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033794 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Radial Struts, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033795 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Pedestal, Rack, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033796 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - End Lift, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033797 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Turn Machinery, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033798 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Rail Lock, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033799 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Bearing Plate, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033800 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Ladders, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033801 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Ladders, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- 143 more...