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
- 7610 more...
- ItemBB034367 - Northern Pacific Engineering Drawing: Shop Plan - Tower Floor, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034368 - Northern Pacific Engineering Drawing: Shop Plan - Tower Channel, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034369 - Northern Pacific Engineering Drawing: Shop Plan - Miscellaneous Steel Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034370 - Northern Pacific Engineering Drawing: Shop Plan - Span Lock Guard, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034371 - Northern Pacific Engineering Drawing: Shop Plan - Miscellaneous Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034372 - Northern Pacific Engineering Drawing: Shop Plan - End Diagonal, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034373 - Northern Pacific Engineering Drawing: Shop Plan - Diagonal Post, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034374 - Northern Pacific Engineering Drawing: Shop Plan - Portal Strut, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034375 - Northern Pacific Engineering Drawing: Shop Plan - Top Lateral, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- 109 more...