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
- 3033 more...
- ItemBB026505 - Great Northern Engineering Drawing: Shop Plan - Counterweight Parts, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026506 - Great Northern Engineering Drawing: Shop Plan - Reinforcement Rod, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026507 - Great Northern Engineering Drawing: Shop Plan - Reinforcement Rod, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026508 - Great Northern Engineering Drawing: Shop Plan - Counterweight Parts, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026509 - Great Northern Engineering Drawing: Shop Plan - Diagonal Bracing, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026510 - Great Northern Engineering Drawing: Shop Plan - Engine Gear, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026511 - Great Northern Engineering Drawing: Repairs, Bridge 4 - Salmon Bay, Ballard, Washington, 1949
- ItemBB026512 - Great Northern Engineering Drawing: Repairs, Bridge 4 - Salmon Bay, Ballard, Washington, 1949
- ItemBB026513 - Great Northern Engineering Drawing: Trainmen's Walk, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- 959 more...