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
- 2380 more...
- ItemBB024930 - Great Northern Engineering Drawing: Shop Plan - Truss Diagonal, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024931 - Great Northern Engineering Drawing: Shop Plan - Truss Diagonal, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024932 - Great Northern Engineering Drawing: Shop Plan - Joint Assembly, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024933 - Great Northern Engineering Drawing: Shop Plan - End Floor Beam and Stringer, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024934 - Great Northern Engineering Drawing: Shop Plan - Typical Floor Beam, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024935 - Great Northern Engineering Drawing: Shop Plan - Stringer Panel, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024936 - Great Northern Engineering Drawing: Shop Plan - Floor Beam, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024937 - Great Northern Engineering Drawing: Shop Plan - Stringer L7 - L8, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024938 - Great Northern Engineering Drawing: Shop Plan - Stringer L7 - L8, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- 1612 more...