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
- 7682 more...
- ItemBB034441 - Northern Pacific Engineering Drawing: Shop Plan - General Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034442 - Northern Pacific Engineering Drawing: Shop Plan - General Layout, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034443 - Northern Pacific Engineering Drawing: Shop Plan - Plan Layout, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034444 - Northern Pacific Engineering Drawing: Shop Plan - Spans D, F, J, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034445 - Northern Pacific Engineering Drawing: Shop Plan - Span E, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034446 - Northern Pacific Engineering Drawing: Shop Plan - Spans G, H, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034447 - Northern Pacific Engineering Drawing: Shop Plan - Details - Ties, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034448 - Northern Pacific Engineering Drawing: Shop Plan - Details - Ties, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034449 - Northern Pacific Engineering Drawing: Shop Plan - Details - Spacer, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- 37 more...