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
- 3127 more...
- ItemBB026599 - Great Northern Engineering Drawing: Shop Plan - Hand Operator, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026600 - Great Northern Engineering Drawing: Shop Plan - Strut Guide, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026601 - Great Northern Engineering Drawing: Shop Plan - Strut Guide, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026602 - Great Northern Engineering Drawing: Shop Plan - Strut Guide, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026603 - Great Northern Engineering Drawing: Strut Guide Repairs, Bridge 4 - Salmon Bay, Ballard, Washington, 1936
- ItemBB026604 - Great Northern Engineering Drawing: Shop Plan - Air Cylinder, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026605 - Great Northern Engineering Drawing: Shop Plan - End Locks, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026606 - Great Northern Engineering Drawing: Shop Plan - End Locks, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026607 - Great Northern Engineering Drawing: Shop Plan - End Locks, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- 865 more...