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SR 99 over DUWAMISH RIVER

Map 

Coordinates:
+47.54288, -122.33413
47°32'34" N, 122°20'03" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.

Facts 

Name:SR 99 over DUWAMISH RIVER
Structure number:0014459A0000000
Location:0.1 N JCT SR 509
Purpose:Carries highway over highway, waterway, and railroad
Route classification:Principal Arterial - Other Freeways or Expressways (Urban) [12]
Length of largest span:294.0 ft. [89.6 m]
Total length:2895.2 ft. [882.4 m]
Roadway width between curbs:44.0 ft. [13.4 m]
Deck width edge-to-edge:57.7 ft. [17.6 m]
Vertical clearance below bridge:26.9 ft. [8.2 m]
Owner:State Highway Agency [01]
Year built:1996
Historic significance:Historical significance is not determinable at this time [4]
Design load:MS 22.5 / HS 25 [9]
Main span material:Steel [3]
Main span design:Movable - Bascule [16]
Deck type:Closed Grating [4]
Wearing surface:Latex Concrete or similar additive [3]

Latest Available Inspection: September 2016 

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:42,897 [as of 2012]
Truck traffic:8% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Good [7 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Better than present minimum criteria [7]
Deck geometry appraisal:Basically intolerable requiring high priority of replacement [2]
Underclearances appraisal:Basically intolerable requiring high priority of corrrective action [3]
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:56.4 tons [51.3 metric tons]
Inventory rating:33.7 tons [30.6 metric tons]
Sufficiency rating:56.2

Previous Inspections 

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
September 201656.2FairSatisfactoryGoodGoodFO42897
September 201456.2FairSatisfactoryGoodGoodFO42897
September 201256.2FairSatisfactoryGoodGoodFO40009
September 201059.0FairSatisfactoryGoodGoodFO39500
September 200859.0FairSatisfactoryGoodGoodFO37698
August 200665.8FairSatisfactoryGoodGoodFO16500
May 200465.8FairSatisfactoryGoodGood-16500
September 200365.8FairSatisfactoryGoodGood-16500
July 200265.8FairSatisfactoryGoodGood-16500
December 200165.8FairSatisfactoryGoodGood-16500
June 200065.8FairSatisfactoryGoodGood-16500
September 199965.8GoodGoodGoodGood-16500
May 199865.8GoodGoodGoodGood-16500
April 199763.5GoodGoodGoodGood-16500