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
- 3059 more...
- ItemBB026531 - Great Northern Engineering Drawing: Revision Calculations - Counterweight, Bridge 4 - Salmon Bay, Ballard, Washington, 1948
- ItemBB026532 - Great Northern Engineering Drawing: General Plan, Bridge 4 - Salmon Bay, Ballard, Washington, 1912
- ItemBB026533 - Great Northern Engineering Drawing: Shop Plan - Counterweight Forms, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026534 - Great Northern Engineering Drawing: Shop Plan - General Drawing, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026535 - Great Northern Engineering Drawing: Maintenance of Operating Strut, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026536 - Great Northern Engineering Drawing: Shop Plan - Bottom Chord, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026537 - Great Northern Engineering Drawing: Shop Plan - Bottom Chord, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026538 - Great Northern Engineering Drawing: Shop Plan - Bottom Chord, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026539 - Great Northern Engineering Drawing: Shop Plan - Bottom Chord, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- 933 more...