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
- 1946 more...
- ItemBB016385 - Northern Pacific Engineering Drawing: Shop Plan - Caisson, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB016386 - Northern Pacific Engineering Drawing: Shop Plan - Caisson, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB016387 - Northern Pacific Engineering Drawing: Shop Plan - Bracketing, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB016388 - Northern Pacific Engineering Drawing: Shop Plan - Pipes, etc., Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB016389 - Northern Pacific Engineering Drawing: Shop Plan - Hatch Detail, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB016390 - Northern Pacific Engineering Drawing: Shop Plan - Caisson, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB016391 - Northern Pacific Engineering Drawing: Shop Plan - Support Frames, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB016392 - Northern Pacific Engineering Drawing: Shop Plan - Support Frames, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB016393 - Northern Pacific Engineering Drawing: Shop Plan - Shafts, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- 5773 more...