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
- 2361 more...
- 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
- ItemBB016814 - Northern Pacific Engineering Drawing: Repairs for Truss, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB016815 - Northern Pacific Engineering Drawing: Repairs for Truss, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB016816 - Northern Pacific Engineering Drawing: Falsework Replace Eyebar, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB016817 - Northern Pacific Engineering Drawing: Damage By Barge, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB016818 - Northern Pacific Engineering Drawing: Falsework Detail, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB016819 - Northern Pacific Engineering Drawing: Repair to Truss, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB016820 - Northern Pacific Engineering Drawing: Condition of Truss Span, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- 5358 more...