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
- 2596 more...
- ItemBB025945 - Great Northern Engineering Drawing: Shop Plan - Telegraph West Tower, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB025946 - Great Northern Engineering Drawing: Shop Plan - Telegraph West Tower, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB025947 - Great Northern Engineering Drawing: Shop Plan - Telegraph West Tower, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB025948 - Great Northern Engineering Drawing: Copper Plate for Foot Switch, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB025949 - Great Northern Engineering Drawing: Repairs Fastener Operator, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB025950 - Great Northern Engineering Drawing: Proposed Bearing Operating Shaft, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB025951 - Great Northern Engineering Drawing: Machinery Repairs, Bridge 4 - Salmon Bay, Ballard, Washington, 1921
- ItemBB025952 - Great Northern Engineering Drawing: End Lock Circuit Control, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB025953 - Great Northern Engineering Drawing: Bearing and Diaphragm, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- 1396 more...