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
- 2397 more...
- ItemBB024947 - Great Northern Engineering Drawing: Shop Plan - Tower Brace, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024948 - Great Northern Engineering Drawing: Shop Plan - Tower Brace, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024949 - Great Northern Engineering Drawing: Shop Plan - Ladders, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024950 - Great Northern Engineering Drawing: Shop Plan - Machinery Support, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024951 - Great Northern Engineering Drawing: Shop Plan - 368 Foot Span, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024952 - Great Northern Engineering Drawing: Shop Plan - Erection Diagram, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024953 - Great Northern Engineering Drawing: Shop Plan - Erection Diagram, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024954 - Great Northern Engineering Drawing: Shop Plan - Erection Diagram, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024955 - Great Northern Engineering Drawing: Shop Plan - Erection Diagram, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- 1595 more...