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
- 2329 more...
- ItemBB024879 - Great Northern Engineering Drawing: Cofferdam West End, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024880 - Great Northern Engineering Drawing: General Plan, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, 1951
- ItemBB024881 - Great Northern Engineering Drawing: Piling and Anchorage Plan, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024882 - Great Northern Engineering Drawing: Pier Number 1, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024883 - Great Northern Engineering Drawing: Pier Number 2, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024884 - Great Northern Engineering Drawing: Pier Number 3, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024885 - Great Northern Engineering Drawing: Fender Details, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024886 - Great Northern Engineering Drawing: Fender Details, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024887 - Great Northern Engineering Drawing: Approach Details, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- 1663 more...