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
- 6748 more...
- ItemBB028712 - Northern Pacific Engineering Drawing: Shop Plan - Lighting Generator, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB028713 - Northern Pacific Engineering Drawing: Shop Plan - Stairway Extension, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB028714 - Northern Pacific Engineering Drawing: Shop Plan - Reinforcement Plates, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB028715 - Northern Pacific Engineering Drawing: Shop Plan - Roof Deck, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB028719 - Northern Pacific Engineering Drawing: Abutments/Piers, Bridge 51 (50), West of Spire Rock, Montana, undated
- ItemBB028720 - Northern Pacific Engineering Drawing: Falsework, Bridge 51 (50), West of Spire Rock, Montana, undated
- ItemBB028721 - Northern Pacific Engineering Drawing: Proposed West Abutment, Bridge 51 (50), West of Spire Rock, Montana, undated
- ItemBB028722 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 51 (50), West of Spire Rock, Montana, 1962
- ItemBB028723 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 51 (50), West of Spire Rock, Montana, 1962
- 971 more...