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
- 7616 more...
- ItemBB034373 - Northern Pacific Engineering Drawing: Shop Plan - Diagonal Post, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034374 - Northern Pacific Engineering Drawing: Shop Plan - Portal Strut, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034375 - Northern Pacific Engineering Drawing: Shop Plan - Top Lateral, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034376 - Northern Pacific Engineering Drawing: Shop Plan - Bottom Lateral, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034377 - Northern Pacific Engineering Drawing: Shop Plan - Span Access, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034378 - Northern Pacific Engineering Drawing: Shop Plan - Floor Plate, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034379 - Northern Pacific Engineering Drawing: Shop Plan - Liftspan, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034380 - Northern Pacific Engineering Drawing: Shop Plan - Liftspan, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034381 - Northern Pacific Engineering Drawing: Shop Plan - Liftspan, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- 103 more...