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
- 1839 more...
- ItemBB028422 - Spokane, Portland and Seattle Railway Engineering Drawing: Switch Box and Details, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028423 - Spokane, Portland and Seattle Railway Engineering Drawing: Gears Limit Switch, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028424 - Spokane, Portland and Seattle Railway Engineering Drawing: Wiring Diagram Rail Lock/Motor, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028425 - Spokane, Portland and Seattle Railway Engineering Drawing: Wiring Diagram Switchboard Lights/Motor, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028426 - Spokane, Portland and Seattle Railway Engineering Drawing: Slow Down Engine, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028427 - Spokane, Portland and Seattle Railway Engineering Drawing: Circuit Breaker Details, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028428 - Spokane, Portland and Seattle Railway Engineering Drawing: Swing Motor Gear, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028429 - Spokane, Portland and Seattle Railway Engineering Drawing: Fly Ball Switch and Details, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028430 - Spokane, Portland and Seattle Railway Engineering Drawing: Motor Gear Drive Detail, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- 2070 more...