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
- 2339 more...
- ItemBB016790 - Northern Pacific Engineering Drawing: Piers 4/7/10/13/17, First Avenue South Overpass, Seattle, Washington, undated
- ItemBB016791 - Northern Pacific Engineering Drawing: Piers, First Avenue South Overpass, Seattle, Washington, undated
- ItemBB016792 - Northern Pacific Engineering Drawing: Fire Stop/Concrete Bent, First Avenue South Overpass, Seattle, Washington, undated
- ItemBB016793 - Northern Pacific Engineering Drawing: Trolley Poles, First Avenue South Overpass, Seattle, Washington, undated
- ItemBB016794 - Northern Pacific Engineering Drawing: Pavement Details, First Avenue South Overpass, Seattle, Washington, undated
- ItemBB016795 - Northern Pacific Engineering Drawing: General Plan, Bridge 1 - Columbia River, West of Pasco, Washington, 1906
- ItemBB016796 - Northern Pacific Engineering Drawing: Reinforcement East Approach Span, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB016797 - Northern Pacific Engineering Drawing: Shop Plan - Girders, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB016798 - Northern Pacific Engineering Drawing: Reinforcement Span West Approach, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- 5380 more...