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
- 3672 more...
- ItemBB027235 - Great Northern Engineering Drawing: General Plan - Bridge Number 4, Bridge 4 - Salmon Bay, Ballard, Washington, 1912
- ItemBB027236 - Great Northern Engineering Drawing: General Plan - Middle Section, Bridge 4 - Salmon Bay, Ballard, Washington, 1912
- ItemBB027237 - Great Northern Engineering Drawing: Design of Steel, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027238 - Great Northern Engineering Drawing: Design of Steel, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027239 - Great Northern Engineering Drawing: Design of Girders and Tower, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027240 - Great Northern Engineering Drawing: Design of Trusses, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027241 - Great Northern Engineering Drawing: Design of Trusses, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027242 - Great Northern Engineering Drawing: Steel Layout, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027243 - Great Northern Engineering Drawing: General Details, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- 320 more...