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
- 3119 more...
- ItemBB026591 - Great Northern Engineering Drawing: Shop Plan - Main Trunnion, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026592 - Great Northern Engineering Drawing: Shop Plan - Details Bearings, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026593 - Great Northern Engineering Drawing: Shop Plan - Bearings, Girders, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026594 - Great Northern Engineering Drawing: Shop Plan - Rack, Gears, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026595 - Great Northern Engineering Drawing: Shop Plan - Equalizing Gears, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026596 - Great Northern Engineering Drawing: Shop Plan - Bearings, Gears, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026597 - Great Northern Engineering Drawing: Shop Plan - Bearings, Gears, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026598 - Great Northern Engineering Drawing: Shop Plan - Bearings, Brackets, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026599 - Great Northern Engineering Drawing: Shop Plan - Hand Operator, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- 873 more...