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
- 2422 more...
- ItemBB024972 - Great Northern Engineering Drawing: Shop Plan - Gears/Pins, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024973 - Great Northern Engineering Drawing: Shop Plan - Shafting, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024974 - Great Northern Engineering Drawing: Shop Plan - Lifts/Shaft, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024975 - Great Northern Engineering Drawing: Shop Plan - Capstans, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024976 - Great Northern Engineering Drawing: Shop Plan - Shims, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024977 - Great Northern Engineering Drawing: Shop Plan - Motor/Gears/Drive, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024978 - Great Northern Engineering Drawing: Shop Plan - General Plan, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024979 - Great Northern Engineering Drawing: Operation/368 Foot Swing Span, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024980 - Great Northern Engineering Drawing: Existing Fender Pier, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- 1570 more...