Railroad Archives Online
- CollectionD0027 - Timothy Miller Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1009 - Engineering Records
- Subseries Level 2008 - Physical plant drawing
- Subseries Level 3001 - Bridges
- 881 more...
- ItemBB022016 - Great Northern Engineering Drawing: Load Center and Circuit Supply Number 3, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB022017 - Great Northern Engineering Drawing: Load Center and Circuit Supply Number 4, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB022018 - Great Northern Engineering Drawing: Junction Box Taps, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB022019 - Great Northern Engineering Drawing: Wiring Plan Operating House, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB022020 - Great Northern Engineering Drawing: Hoisting Device Collar Ring, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB022021 - Great Northern Engineering Drawing: Center Pier Repair, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB022022 - Great Northern Engineering Drawing: Center Pier, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB022023 - Great Northern Engineering Drawing: Renewal of Fender Pier, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB023293 - Great Northern Engineering Drawing: General Plan, Bridge 436 - Skykomish River, Index, Washington, 1899
- 3111 more...