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
- 2329 more...
- ItemBB016780 - Northern Pacific Engineering Drawing: 1st Avenue South Overhead Bridge, First Avenue South Overpass, Seattle, Washington, undated
- ItemBB016781 - Northern Pacific Engineering Drawing: 1st Avenue South Overhead Bridge, First Avenue South Overpass, Seattle, Washington, undated
- ItemBB016782 - Northern Pacific Engineering Drawing: 1st Avenue South Overhead Bridge, First Avenue South Overpass, Seattle, Washington, undated
- ItemBB016783 - Northern Pacific Engineering Drawing: 1st Avenue South Overhead Bridge, First Avenue South Overpass, Seattle, Washington, undated
- ItemBB016784 - Northern Pacific Engineering Drawing: General Layout, First Avenue South Overpass, Seattle, Washington, undated
- ItemBB016785 - Northern Pacific Engineering Drawing: Layout Steel Construction, First Avenue South Overpass, Seattle, Washington, undated
- ItemBB016786 - Northern Pacific Engineering Drawing: Miscellaneous Details, First Avenue South Overpass, Seattle, Washington, undated
- ItemBB016787 - Northern Pacific Engineering Drawing: Abutments, First Avenue South Overpass, Seattle, Washington, undated
- ItemBB016788 - Northern Pacific Engineering Drawing: Pier Number 2, First Avenue South Overpass, Seattle, Washington, undated
- 5390 more...