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
- 3764 more...
- 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
- ItemBB027329 - Great Northern Engineering Drawing: Shop Plan - Fixed End Truss, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027330 - Great Northern Engineering Drawing: Shop Plan - Intermediate Metal, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027331 - Great Northern Engineering Drawing: Shop Plan - Trunnion End Moving Leaf, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027332 - Great Northern Engineering Drawing: Shop Plan - Counterweight Link, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027333 - Great Northern Engineering Drawing: Shop Plan - Counterweight Upper Plate, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027334 - Great Northern Engineering Drawing: Shop Plan - Counterweight Lower Plate, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027335 - Great Northern Engineering Drawing: Shop Plan - Counterweight Girder, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- 228 more...