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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 

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]
Evaluation:Functionally obsolete [2]
Sufficiency rating:56.2

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
September 201656.2Functionally obsoleteSatisfactoryGoodGood42897
September 201456.2Functionally obsoleteSatisfactoryGoodGood42897
September 201256.2Functionally obsoleteSatisfactoryGoodGood40009
September 201059.0Functionally obsoleteSatisfactoryGoodGood39500
September 200859.0Functionally obsoleteSatisfactoryGoodGood37698
August 200665.8Functionally obsoleteSatisfactoryGoodGood16500
May 200465.8Not deficientSatisfactoryGoodGood16500
September 200365.8Not deficientSatisfactoryGoodGood16500
July 200265.8Not deficientSatisfactoryGoodGood16500
December 200165.8Not deficientSatisfactoryGoodGood16500
June 200065.8Not deficientSatisfactoryGoodGood16500
September 199965.8Not deficientGoodGoodGood16500
May 199865.8Not deficientGoodGoodGood16500
April 199763.5Not deficientGoodGoodGood16500