Railroad Archives Online
- CollectionD0027 - Timothy Miller Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1009 - Engineering Records
- Subseries Level 2008 - Physical plant drawing
- Subseries Level 3001 - Bridges
- 7602 more...
- ItemBB034359 - Northern Pacific Engineering Drawing: Shop Plan - Portal Strut, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034360 - Northern Pacific Engineering Drawing: Shop Plan - Top Lateral, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034361 - Northern Pacific Engineering Drawing: Shop Plan - Bottom Lateral, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034362 - Northern Pacific Engineering Drawing: Shop Plan - Floor Bracing, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034363 - Northern Pacific Engineering Drawing: Shop Plan - Diagonal, Walkway, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034364 - Northern Pacific Engineering Drawing: Shop Plan - Bottom Chord, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034365 - Northern Pacific Engineering Drawing: Shop Plan - Bottom Chord, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034366 - Northern Pacific Engineering Drawing: Shop Plan - Top Chord, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034367 - Northern Pacific Engineering Drawing: Shop Plan - Tower Floor, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- 117 more...