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
- 7405 more...
- ItemBB034162 - Northern Pacific Engineering Drawing: Support Frame, Jump Span, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB034163 - Northern Pacific Engineering Drawing: Match Mark Diagram, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB034164 - Northern Pacific Engineering Drawing: Anchor Bolt Plan, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB034165 - Northern Pacific Engineering Drawing: Index of Sheets, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034166 - Northern Pacific Engineering Drawing: Project Plan and Elevation, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034167 - Northern Pacific Engineering Drawing: Lift Span and Elevation, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034168 - Northern Pacific Engineering Drawing: Modification of Existing Piers, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034169 - Northern Pacific Engineering Drawing: Approach Span, Girder Span, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034170 - Northern Pacific Engineering Drawing: Approach Span - Frame and Floor System, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- 314 more...