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
- 2429 more...
- ItemBB024979 - Great Northern Engineering Drawing: Operation/368 Foot Swing Span, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024980 - Great Northern Engineering Drawing: Existing Fender Pier, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024983 - Great Northern Engineering Drawing: Fender Pier Repairs, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024984 - Great Northern Engineering Drawing: Repair Fender Pier 2, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024985 - Great Northern Engineering Drawing: Proposed Rip Rap Bridge - 12, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024987 - Great Northern Engineering Drawing: Channel Soundings, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024988 - Great Northern Engineering Drawing: Channel Soundings, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024989 - Great Northern Engineering Drawing: Channel Soundings, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB024990 - Great Northern Engineering Drawing: Channel Soundings, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- 1563 more...