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
- 2402 more...
- ItemBB031229 - Spokane, Portland and Seattle Railway Engineering Drawing: Location of Masonry Bearings, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB031230 - Spokane, Portland and Seattle Railway Engineering Drawing: Location of Masonry Bearings, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB031231 - Spokane, Portland and Seattle Railway Engineering Drawing: Masonry Plans, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB031232 - Spokane, Portland and Seattle Railway Engineering Drawing: Masonry Plans, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB031233 - Spokane, Portland and Seattle Railway Engineering Drawing: Masonry Details, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB031234 - Spokane, Portland and Seattle Railway Engineering Drawing: Masonry Plans, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB031235 - Spokane, Portland and Seattle Railway Engineering Drawing: Marking Diagram, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB031236 - Spokane, Portland and Seattle Railway Engineering Drawing: Soundings, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB031237 - Spokane, Portland and Seattle Railway Engineering Drawing: Soundings, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- 1507 more...