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
- 3411 more...
- ItemBB033424 - Spokane, Portland and Seattle Railway Engineering Drawing: Wiring Diagram End Lift Motor, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB033425 - Spokane, Portland and Seattle Railway Engineering Drawing: Soundings, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB033426 - Spokane, Portland and Seattle Railway Engineering Drawing: Soundings, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB033427 - Spokane, Portland and Seattle Railway Engineering Drawing: Soundings, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB033428 - Spokane, Portland and Seattle Railway Engineering Drawing: Soundings, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB033429 - Spokane, Portland and Seattle Railway Engineering Drawing: Soundings, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB033430 - Spokane, Portland and Seattle Railway Engineering Drawing: Soundings, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB033431 - Spokane, Portland and Seattle Railway Engineering Drawing: Soundings, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB033432 - Spokane, Portland and Seattle Railway Engineering Drawing: Sketch Oregon Railroad and Navigation Company Crossing, Bridge 5.7 - Union Pacific Railroad, North of Willbridge, Oregon, undated
- 498 more...