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
- 1911 more...
- ItemBB016350 - Northern Pacific Engineering Drawing: Drawbridge Electrical, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB016351 - Northern Pacific Engineering Drawing: Electric Rail Locks, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB016352 - Northern Pacific Engineering Drawing: Gear Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB016353 - Northern Pacific Engineering Drawing: Gear Bracket/Bearing/Standard, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB016354 - Northern Pacific Engineering Drawing: Center Wedges, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB016355 - Northern Pacific Engineering Drawing: Proposed Steel Drawrest, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB016356 - Northern Pacific Engineering Drawing: Proposed Steel Drawrest, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB016357 - Northern Pacific Engineering Drawing: Replace Drawrests, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB016358 - Northern Pacific Engineering Drawing: Proposed Steel Drawrest, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- 5808 more...