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
- 7641 more...
- 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
- ItemBB034400 - Northern Pacific Engineering Drawing: Shop Plan - Machinery, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034401 - Northern Pacific Engineering Drawing: Shop Plan - Machinery, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034402 - Northern Pacific Engineering Drawing: Shop Plan - Tower Sheave, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034403 - Northern Pacific Engineering Drawing: Shop Plan - Rope Diagonal, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034404 - Northern Pacific Engineering Drawing: Shop Plan - Brake Arrangement, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034405 - Northern Pacific Engineering Drawing: Shop Plan - Brake Lever, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034406 - Northern Pacific Engineering Drawing: Shop Plan - Transition, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- 78 more...