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
- 7626 more...
- ItemBB034383 - Northern Pacific Engineering Drawing: Shop Plan - Key Plan, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034384 - Northern Pacific Engineering Drawing: Shop Plan - General Arrangement, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034385 - Northern Pacific Engineering Drawing: Shop Plan - Machine Layout, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034386 - Northern Pacific Engineering Drawing: Shop Plan - Tower Sheave, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034387 - Northern Pacific Engineering Drawing: Shop Plan - Tower Sheave, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034388 - Northern Pacific Engineering Drawing: Shop Plan - Tower Sheave, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034389 - Northern Pacific Engineering Drawing: Shop Plan - Operating Drum, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034390 - Northern Pacific Engineering Drawing: Shop Plan - Operating Gear, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034391 - Northern Pacific Engineering Drawing: Shop Plan - Shafts, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- 93 more...