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
- 7709 more...
- 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
- ItemBB034470 - Northern Pacific Engineering Drawing: Shop Plan - Manlock Supports, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034471 - Northern Pacific Engineering Drawing: Shop Plan - Manlock Supports, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034472 - Northern Pacific Engineering Drawing: Shop Plan - Shafts, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034473 - Northern Pacific Engineering Drawing: Shop Plan - Ventilation Powerplant, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034474 - Northern Pacific Engineering Drawing: Shop Plan - Wales, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034475 - Northern Pacific Engineering Drawing: Shop Plan - Wale Posts, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034476 - Northern Pacific Engineering Drawing: Shop Plan - Struts, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- 10 more...