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1st Avenue South Bridge (SB)

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Duwamish River West Bridge

Southbound

Photo taken by Douglas Butler in April 2013

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Facts 

Overview
Bascule bridge over Duwamish River West on Southbound WA 99 in Seattle
Location
Seattle, King County, Washington
Status
Open to traffic
History
Built 1996
Design
Bascule
Dimensions
Length of largest span: 379.0 ft.
Total length: 2,895.2 ft. (0.5 mi.)
Deck width: 44.0 ft.
Approximate latitude, longitude
+47.54225, -122.33459   (decimal degrees)
47°32'32" N, 122°20'05" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/550074/5265639 (zone/easting/northing)
Quadrangle map:
Seattle South
Inventory number
BH 34273 (Bridgehunter.com ID)
Inspection (as of 09/2016)
Deck condition rating: Satisfactory (6 out of 9)
Superstructure condition rating: Good (7 out of 9)
Substructure condition rating: Good (7 out of 9)
Appraisal: Functionally obsolete
Sufficiency rating: 56.2 (out of 100)
Average daily traffic (as of 2012)
42,897

Update Log 

  • January 16, 2016: New Street View added by Douglas Butler
  • November 30, 2015: New Street View added by Douglas Butler
  • September 16, 2015: New photo from Douglas Butler
  • May 28, 2014: New photo from Douglas Butler

Sources 

  • K. A. Erickson
  • Douglas Butler