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
- 876 more...
- ItemBB022011 - Great Northern Engineering Drawing: PELEC Relay Housing, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB022012 - Great Northern Engineering Drawing: PELEC Relay Housing, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB022013 - Great Northern Engineering Drawing: Electrical Conduit Layout, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB022014 - Great Northern Engineering Drawing: Load Center and Circuit Supply Number 1, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB022015 - Great Northern Engineering Drawing: Load Center and Circuit Supply Number 2, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB022016 - Great Northern Engineering Drawing: Load Center and Circuit Supply Number 3, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB022017 - Great Northern Engineering Drawing: Load Center and Circuit Supply Number 4, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB022018 - Great Northern Engineering Drawing: Junction Box Taps, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- ItemBB022019 - Great Northern Engineering Drawing: Wiring Plan Operating House, Bridge 12 - Swinomish Slough, West of Whitmarsh, Washington, undated
- 3116 more...