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
- 2388 more...
- ItemBB024938 - Great Northern Engineering Drawing: Shop Plan - Stringer L7 - L8, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024939 - Great Northern Engineering Drawing: Shop Plan - Typical Stringers, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024940 - Great Northern Engineering Drawing: Shop Plan - Bottom Lateral, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024941 - Great Northern Engineering Drawing: Shop Plan - Bottom Lateral, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024942 - Great Northern Engineering Drawing: Shop Plan - Portal and Top Lateral, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024943 - Great Northern Engineering Drawing: Shop Plan - Portal at U7, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024944 - Great Northern Engineering Drawing: Shop Plan - Frames and Laterals, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024945 - Great Northern Engineering Drawing: Shop Plan - Operations House, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024946 - Great Northern Engineering Drawing: Shop Plan - Tower Columns, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- 1604 more...