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
- 3042 more...
- ItemBB026514 - Great Northern Engineering Drawing: Steel Details - Bridge Number 4, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026515 - Great Northern Engineering Drawing: Steel Details - Bridge Number 4, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- ItemBB026516 - Great Northern Engineering Drawing: Encase - Brackets 2 and 3, Bridge 4 - Salmon Bay, Ballard, Washington, 1949
- ItemBB026517 - Great Northern Engineering Drawing: Reinforcement Member 20 - 29, Bridge 4 - Salmon Bay, Ballard, Washington, 1951
- ItemBB026518 - Great Northern Engineering Drawing: Repairs - Stub Stringer, Bridge 4 - Salmon Bay, Ballard, Washington, 1951
- ItemBB026519 - Great Northern Engineering Drawing: Deck Plan, Bridge 4 - Salmon Bay, Ballard, Washington, 1956
- ItemBB026520 - Great Northern Engineering Drawing: Deck Plan, Bridge 4 - Salmon Bay, Ballard, Washington, 1958
- ItemBB026521 - Great Northern Engineering Drawing: Deck Plan, Bridge 4 - Salmon Bay, Ballard, Washington, 1959
- ItemBB026522 - Great Northern Engineering Drawing: Tie Details - Bridge Number 4, Bridge 4 - Salmon Bay, Ballard, Washington, undated
- 950 more...