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
- 7634 more...
- ItemBB034391 - Northern Pacific Engineering Drawing: Shop Plan - Shafts, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034392 - Northern Pacific Engineering Drawing: Shop Plan - Machinery, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034393 - Northern Pacific Engineering Drawing: Shop Plan - Drum Assembly, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034394 - Northern Pacific Engineering Drawing: Shop Plan - Drum Frame, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034395 - Northern Pacific Engineering Drawing: Shop Plan - Rope Take Up, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034396 - Northern Pacific Engineering Drawing: Shop Plan - Gear Guard, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034397 - Northern Pacific Engineering Drawing: Shop Plan - Machinery, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034398 - Northern Pacific Engineering Drawing: Shop Plan - Machinery, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034399 - Northern Pacific Engineering Drawing: Shop Plan - Air Buffer, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- 85 more...