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
- 1817 more...
- ItemBB028400 - Spokane, Portland and Seattle Railway Engineering Drawing: Switch Board, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028401 - Spokane, Portland and Seattle Railway Engineering Drawing: End Lift Motor Gears, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028402 - Spokane, Portland and Seattle Railway Engineering Drawing: Rail Lock Motors, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028403 - Spokane, Portland and Seattle Railway Engineering Drawing: Structural Details, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028404 - Spokane, Portland and Seattle Railway Engineering Drawing: Details of Brake, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028405 - Spokane, Portland and Seattle Railway Engineering Drawing: Interlock Details, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028406 - Spokane, Portland and Seattle Railway Engineering Drawing: Interlock Details, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028407 - Spokane, Portland and Seattle Railway Engineering Drawing: Signal Light Box, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028408 - Spokane, Portland and Seattle Railway Engineering Drawing: Motor and Brake Supports, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- 2092 more...