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
- 7501 more...
- ItemBB034258 - Northern Pacific Engineering Drawing: Shop Plan - Tower - Rear, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034259 - Northern Pacific Engineering Drawing: Shop Plan - Tower Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034260 - Northern Pacific Engineering Drawing: Shop Plan - Bracing Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034261 - Northern Pacific Engineering Drawing: Shop Plan - Diagonal and Strut, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034262 - Northern Pacific Engineering Drawing: Shop Plan - Rear Leg, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034263 - Northern Pacific Engineering Drawing: Shop Plan - Miscellaneous Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034264 - Northern Pacific Engineering Drawing: Shop Plan - Sheave Girder, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034265 - Northern Pacific Engineering Drawing: Shop Plan - Sheave Girder Section, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034266 - Northern Pacific Engineering Drawing: Shop Plan - Sheave Girder Section, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- 218 more...