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
- 1941 more...
- ItemBB016380 - Northern Pacific Engineering Drawing: Shop Plan - Cutting Edges, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB016381 - Northern Pacific Engineering Drawing: Shop Plan - Lateral Truss, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB016382 - Northern Pacific Engineering Drawing: Shop Plan - Caisson, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB016383 - Northern Pacific Engineering Drawing: Shop Plan - Caisson, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB016384 - Northern Pacific Engineering Drawing: Shop Plan - Caisson, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- 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
- 5778 more...