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
- 7579 more...
- ItemBB034336 - Northern Pacific Engineering Drawing: Shop Plan - Stair Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034337 - Northern Pacific Engineering Drawing: Shop Plan - Platform and Handrail, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034338 - Northern Pacific Engineering Drawing: Shop Plan - Handrail Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034339 - Northern Pacific Engineering Drawing: Shop Plan - 2 Reinforced Concrete and Tower Girders, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034340 - Northern Pacific Engineering Drawing: Shop Plan - Stringer and Tower Floor, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034341 - Northern Pacific Engineering Drawing: Shop Plan - Stringer and Tower Floor, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034342 - Northern Pacific Engineering Drawing: Shop Plan - Counterweight Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034343 - Northern Pacific Engineering Drawing: Shop Plan - Counterweight Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034344 - Northern Pacific Engineering Drawing: Shop Plan - Counterweight Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- 140 more...