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
- 7434 more...
- ItemBB034191 - Northern Pacific Engineering Drawing: Towers - Sheave Hood, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034192 - Northern Pacific Engineering Drawing: Towers - Supports and Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034193 - Northern Pacific Engineering Drawing: Counterweights, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034194 - Northern Pacific Engineering Drawing: Counterweight Modifications, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034195 - Northern Pacific Engineering Drawing: Rope Casting, Spacing Guide, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034196 - Northern Pacific Engineering Drawing: Bearing Devices, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034197 - Northern Pacific Engineering Drawing: Rail Track and Deck, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034198 - Northern Pacific Engineering Drawing: Conley Rail Joints, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034199 - Northern Pacific Engineering Drawing: General Machinery Arrangement, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- 285 more...