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
- 5947 more...
- ItemBB025605 - Northern Pacific Engineering Drawing: Towers - Upper Section, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025606 - Northern Pacific Engineering Drawing: Towers - Upper Section, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025607 - Northern Pacific Engineering Drawing: Counterweight Span Column, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025608 - Northern Pacific Engineering Drawing: Counterweight, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025609 - Northern Pacific Engineering Drawing: Lift Span/Stringer/Braces, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025610 - Northern Pacific Engineering Drawing: Floor Beam/Sway Frame/Center Girder, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025611 - Northern Pacific Engineering Drawing: Truss L0 to L3, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025612 - Northern Pacific Engineering Drawing: Truss L4 to L6, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025613 - Northern Pacific Engineering Drawing: Lifting Girder, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- 1772 more...