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
- 3341 more...
- ItemBB026817 - Great Northern Engineering Drawing: Shop Plan - Stringers, Bridge 36 - Skagit River, North of Mount Vernon, Washington, undated
- ItemBB026818 - Great Northern Engineering Drawing: Water Elevations, Bridge 36 - Skagit River, North of Mount Vernon, Washington, undated
- ItemBB026819 - Great Northern Engineering Drawing: Contour Map and Profile, Bridge 36 - Skagit River, North of Mount Vernon, Washington, undated
- ItemBB026820 - Great Northern Engineering Drawing: Soundings - Skagit River, Bridge 36 - Skagit River, North of Mount Vernon, Washington, undated
- ItemBB026821 - Great Northern Engineering Drawing: Present Steel Bridge, Bridge 36 - Skagit River, North of Mount Vernon, Washington, undated
- ItemBB026822 - Great Northern Engineering Drawing: Add Bents Required, Bridge 36 - Skagit River, North of Mount Vernon, Washington, 1916
- ItemBB026823 - Great Northern Engineering Drawing: General Plan and Map, Bridge 36 - Skagit River, North of Mount Vernon, Washington, undated
- ItemBB026824 - Great Northern Engineering Drawing: General Plan and Map, Bridge 36 - Skagit River, North of Mount Vernon, Washington, undated
- ItemBB026825 - Great Northern Engineering Drawing: General Plan and Map, Bridge 36 - Skagit River, North of Mount Vernon, Washington, undated
- 651 more...