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
- 2372 more...
- ItemBB024922 - Great Northern Engineering Drawing: Shop Plan - Bottom Chord L4 - L6, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024923 - Great Northern Engineering Drawing: Shop Plan - Bottom Chord L6 - L8, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024924 - Great Northern Engineering Drawing: Shop Plan - End Post, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024925 - Great Northern Engineering Drawing: Shop Plan - Top Chord U1 - U3, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024926 - Great Northern Engineering Drawing: Shop Plan - Top Chord U3 - U5, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024927 - Great Northern Engineering Drawing: Shop Plan - Top Chord U5 - U7, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024928 - Great Northern Engineering Drawing: Shop Plan - Top Chord U7 - U7, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024929 - Great Northern Engineering Drawing: Shop Plan - Truss Vertical, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024930 - Great Northern Engineering Drawing: Shop Plan - Truss Diagonal, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- 1620 more...