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
- 3660 more...
- ItemBB033687 - Spokane, Portland and Seattle Railway Engineering Drawing: General Cross Sections, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033688 - Spokane, Portland and Seattle Railway Engineering Drawing: General Details of Truss, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033689 - Spokane, Portland and Seattle Railway Engineering Drawing: Revision Sketch Posts, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, 1906
- ItemBB033690 - Spokane, Portland and Seattle Railway Engineering Drawing: Cross Header Details, Laterals and Diagram, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033691 - Spokane, Portland and Seattle Railway Engineering Drawing: Details Floor Beams, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033692 - Spokane, Portland and Seattle Railway Engineering Drawing: Stringers, Frames, Struts, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033693 - Spokane, Portland and Seattle Railway Engineering Drawing: Portal, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033694 - Spokane, Portland and Seattle Railway Engineering Drawing: Details End Bearings, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- 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
- 249 more...