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
- 3772 more...
- ItemBB027335 - Great Northern Engineering Drawing: Shop Plan - Counterweight Girder, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027336 - Great Northern Engineering Drawing: Shop Plan - Concrete Counterweight, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027337 - Great Northern Engineering Drawing: Shop Plan - General Machinery, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027338 - Great Northern Engineering Drawing: Shop Plan - Operating Machinery, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027339 - Great Northern Engineering Drawing: Shop Plan - Trunnion Pins, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027340 - Great Northern Engineering Drawing: Shop Plan - Operating Machinery, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027341 - Great Northern Engineering Drawing: Shop Plan - End - Lock, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027342 - Great Northern Engineering Drawing: Shop Plan - Operating House, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB027343 - Great Northern Engineering Drawing: Shop Plan - Track Floor, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- 220 more...