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
- 3051 more...
- ItemBB026523 - Great Northern Engineering Drawing: Rack Segment - Bridge Number 4, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026524 - Great Northern Engineering Drawing: Steel Repairs, Bridge 4 - Salmon Bay, Ballard, Washington, 1965
- ItemBB026525 - Great Northern Engineering Drawing: Steel Repairs, Bridge 4 - Salmon Bay, Ballard, Washington, 1965
- ItemBB026526 - Great Northern Engineering Drawing: 13 Pile Dolphin, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026527 - Great Northern Engineering Drawing: Repair Main Counterweight Trunnion, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026528 - Great Northern Engineering Drawing: Guide - 132 Pound Metal Rail, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026529 - Great Northern Engineering Drawing: Details Frame Span - Machinery, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026530 - Great Northern Engineering Drawing: Details Frame Span - Machinery, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026531 - Great Northern Engineering Drawing: Revision Calculations - Counterweight, Bridge 4 - Salmon Bay, Ballard, Washington, 1948
- 941 more...