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
- 2354 more...
- ItemBB016805 - Northern Pacific Engineering Drawing: Bottom Chord/Collar Strut, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB016806 - Northern Pacific Engineering Drawing: Vertical Post Bar, etc., Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB016807 - Northern Pacific Engineering Drawing: Portal/Cross Frame, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB016808 - Northern Pacific Engineering Drawing: Top Laterals, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB016809 - Northern Pacific Engineering Drawing: Bearings, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB016810 - Northern Pacific Engineering Drawing: Reinforcement to Floor System, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB016811 - Northern Pacific Engineering Drawing: Lateral Conn/Bottom Chord, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB016812 - Northern Pacific Engineering Drawing: Marking Diagram, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB016813 - Northern Pacific Engineering Drawing: Repairs for Truss, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- 5365 more...