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SR 520 over LAKE WASHINGTON

Map 

Coordinates:
+47.64472, -122.28944
47°38'41" N, 122°17'22" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.

Facts 

Name:SR 520 over LAKE WASHINGTON
Structure number:0006651A0000000
Location:0.7 E JCT SR 513
Purpose:Carries highway and pedestrian walkway over waterway
Route classification:Principal Arterial - Other Freeways or Expressways (Urban) [12]
Length of largest span:240.2 ft. [73.2 m]
Total length:4335.2 ft. [1321.3 m]
Roadway width between curbs:51.8 ft. [15.8 m]
Deck width edge-to-edge:59.1 ft. [18.0 m]
Vertical clearance above deck:16.7 ft. [5.1 m]
Vertical clearance below bridge:44.9 ft. [13.7 m]
Owner:State Highway Agency [01]
Year built:1963
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Main span material:Steel [3]
Main span design:Truss - Thru [10]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: August 2015 

Status:Open, no restriction [A]
Average daily traffic:60,221 [as of 2012]
Truck traffic:4% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Basically intolerable requiring high priority of corrrective action [3]
Deck geometry appraisal:Meets minimum tolerable limits to be left in place as is [4]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Banks are protected or well vegetated. River control devices such as spur dikes and embankment protection are not required or are in a stable condition. [8]
Pier/abutment protection:In place and functioning [2]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:22.1 tons [20.1 metric tons]
Inventory rating:15.0 tons [13.6 metric tons]
Evaluation:Functionally obsolete [2]
Sufficiency rating:37.5

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
August 201537.5Functionally obsoleteGoodSatisfactorySatisfactory60221
July 201346.5Not deficientGoodSatisfactorySatisfactory60221
July 201146.5Not deficientGoodSatisfactorySatisfactory97870
June 200946.5Not deficientGoodSatisfactorySatisfactory99019