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
- 3802 more...
- ItemBB033829 - Spokane, Portland and Seattle Railway Engineering Drawing: Telegraph Brackets, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033830 - Spokane, Portland and Seattle Railway Engineering Drawing: Wiring Diagram Swing Motor/Lock, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033831 - Spokane, Portland and Seattle Railway Engineering Drawing: Brackets Electrical Connections, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033832 - Spokane, Portland and Seattle Railway Engineering Drawing: Deck Plan, Bridge 9.6 - Columbia River, Vancouver, Washington, undated
- ItemBB033833 - Spokane, Portland and Seattle Railway Engineering Drawing: Deck Plan, Bridge 9.6 - Columbia River, Vancouver, Washington, undated
- ItemBB033834 - Spokane, Portland and Seattle Railway Engineering Drawing: Deck Plan, Bridge 9.6 - Columbia River, Vancouver, Washington, undated
- ItemBB033835 - Spokane, Portland and Seattle Railway Engineering Drawing: Deck Plan, Bridge 9.6 - Columbia River, Vancouver, Washington, undated
- ItemBB033836 - Spokane, Portland and Seattle Railway Engineering Drawing: Steel Ties, Bridge 9.6 - Columbia River, Vancouver, Washington, undated
- ItemBB033837 - Spokane, Portland and Seattle Railway Engineering Drawing: Steel Tie Plan, Bridge 9.6 - Columbia River, Vancouver, Washington, undated
- 107 more...