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
- 6682 more...
- ItemBB028646 - Northern Pacific Engineering Drawing: Shop Plan - Top Chord, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB028647 - Northern Pacific Engineering Drawing: Shop Plan - Counterweight Support, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB028648 - Northern Pacific Engineering Drawing: Shop Plan - Counterweight Support, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB028649 - Northern Pacific Engineering Drawing: Shop Plan - Platform Counterweight, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB028650 - Northern Pacific Engineering Drawing: Shop Plan - Counterweight Support, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB028651 - Northern Pacific Engineering Drawing: Shop Plan - Top Chord, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB028652 - Northern Pacific Engineering Drawing: Shop Plan - Diagonals, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB028653 - Northern Pacific Engineering Drawing: Shop Plan - H Frame/Cover, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB028654 - Northern Pacific Engineering Drawing: Shop Plan - Diagonals, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- 1037 more...