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
- 7351 more...
- ItemBB031198 - Northern Pacific Engineering Drawing: Shop Plan - Operating Rope, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB031199 - Northern Pacific Engineering Drawing: Shop Plan - Suspending Rope, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB031200 - Northern Pacific Engineering Drawing: Shop Plan - General Plan, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB031201 - Northern Pacific Engineering Drawing: Shop Plan - Link Bar Operation, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB031602 - Northern Pacific Engineering Drawing: Deck Plate Girders (DPG), undated
- ItemBB032003 - Northern Pacific Engineering Drawing: Deck Plan, Bridge 21.7 - Cedar River - Deck Plan, Renton, Washington, 1961
- ItemBB033909 - Northern Pacific Engineering Drawing: Abutments 1 and 4, Bridge 91 - Underpass, South of Castle Rock, Washington, undated
- ItemBB033910 - Northern Pacific Engineering Drawing: Piers 2 and 3, Bridge 91 - Underpass, South of Castle Rock, Washington, undated
- ItemBB034034 - Northern Pacific Engineering Drawing: Precast Bent and Abutment, Bridge 82, South of Paha, Washington, undated
- 368 more...