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
- 7556 more...
- ItemBB034313 - Northern Pacific Engineering Drawing: Shop Plan - Floor Beam Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034314 - Northern Pacific Engineering Drawing: Shop Plan - Floor Beam Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034315 - Northern Pacific Engineering Drawing: Shop Plan - Floor Beam Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034316 - Northern Pacific Engineering Drawing: Shop Plan - Portal and Top Lateral, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034317 - Northern Pacific Engineering Drawing: Shop Plan - Bottom Lateral, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034318 - Northern Pacific Engineering Drawing: Shop Plan - Bracing Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034319 - Northern Pacific Engineering Drawing: Shop Plan - Steel Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034320 - Northern Pacific Engineering Drawing: Shop Plan - Stringer and Floor Frame, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034321 - Northern Pacific Engineering Drawing: Shop Plan - Floor Framing, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- 163 more...