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
- 2338 more...
- ItemBB024888 - Great Northern Engineering Drawing: Design Stresses, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024889 - Great Northern Engineering Drawing: Design Stresses, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024890 - Great Northern Engineering Drawing: Structural Steel Design Number 12, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024891 - Great Northern Engineering Drawing: Structural Steel Design Number 12, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024892 - Great Northern Engineering Drawing: Structural Steel Design Number 12, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024893 - Great Northern Engineering Drawing: Structural Steel Design Number 12, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024894 - Great Northern Engineering Drawing: Structural Steel Design Number 12, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024895 - Great Northern Engineering Drawing: Structural Steel Design Number 12, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024896 - Great Northern Engineering Drawing: Structural Steel Design Number 12, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- 1654 more...