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
- 7517 more...
- ItemBB034274 - Northern Pacific Engineering Drawing: Shop Plan - Girder Span Slide, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034275 - Northern Pacific Engineering Drawing: Shop Plan - Rope Guide, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034276 - Northern Pacific Engineering Drawing: Shop Plan - Bottom Chord, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034277 - Northern Pacific Engineering Drawing: Shop Plan - Bottom Chord, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034278 - Northern Pacific Engineering Drawing: Shop Plan - Bottom Chord, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034279 - Northern Pacific Engineering Drawing: Shop Plan - Bottom Chord, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034280 - Northern Pacific Engineering Drawing: Shop Plan - Bottom Chord, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034281 - Northern Pacific Engineering Drawing: Shop Plan - Top Chord, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034282 - Northern Pacific Engineering Drawing: Shop Plan - Top Chord, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- 202 more...