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
- 5967 more...
- ItemBB025625 - Northern Pacific Engineering Drawing: Operating Drum Assembly, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025626 - Northern Pacific Engineering Drawing: Machinery in House, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025627 - Northern Pacific Engineering Drawing: Rope Take - ups, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025628 - Northern Pacific Engineering Drawing: Element Wiring Diagram Power Circuit, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025629 - Northern Pacific Engineering Drawing: Element Wiring Diagram Signal/Control, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025630 - Northern Pacific Engineering Drawing: Electrical Detail/Devices, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025631 - Northern Pacific Engineering Drawing: Description of Operation, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025632 - Northern Pacific Engineering Drawing: Shop Plan - Electrical Plan, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025633 - Northern Pacific Engineering Drawing: Shop Plan - Electrical Plan, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- 1752 more...