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
- 7702 more...
- ItemBB034461 - Northern Pacific Engineering Drawing: Shop Plan - Caisson, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034462 - Northern Pacific Engineering Drawing: Shop Plan - Caisson, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034463 - Northern Pacific Engineering Drawing: Shop Plan - Caisson, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034464 - Northern Pacific Engineering Drawing: Shop Plan - Caisson, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034465 - Northern Pacific Engineering Drawing: Shop Plan - Caisson, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034466 - Northern Pacific Engineering Drawing: Shop Plan - Bracing, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034467 - Northern Pacific Engineering Drawing: Shop Plan - Pipes and Vents, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034468 - Northern Pacific Engineering Drawing: Shop Plan - Hatch Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034469 - Northern Pacific Engineering Drawing: Shop Plan - Caisson, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- 17 more...