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
- 3757 more...
- ItemBB027320 - Great Northern Engineering Drawing: Shop Plan - Detail Portal, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027321 - Great Northern Engineering Drawing: Shop Plan - General Drawing, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027322 - Great Northern Engineering Drawing: Shop Plan - Stress Sheet, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027323 - Great Northern Engineering Drawing: Shop Plan - Stress Sheet, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027324 - Great Northern Engineering Drawing: Shop Plan - Masonry Plan, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027325 - Great Northern Engineering Drawing: Shop Plan - Counterweight Tower, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027326 - Great Northern Engineering Drawing: Shop Plan - Counterweight Tower, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027327 - Great Northern Engineering Drawing: Shop Plan - Lower Counterweight, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027328 - Great Northern Engineering Drawing: Shop Plan - Fixed End Movement, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- 235 more...