Share:

SR 99 over DUWAMISH RIVER

Map

Coordinates:
+47.53794, -122.33500
47°32'17" N, 122°20'06" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
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:26.2 ft. [8.0 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 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:48,315 [as of 2016]
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:Meets minimum tolerable limits to be left in place as is [4]
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]
Sufficiency rating:58.3
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$52,110,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
September 2018FairSatisfactoryGoodGood4831558.3
September 2016FairSatisfactoryGoodGood4289756.2
September 2014FairSatisfactoryGoodGood4289756.2
September 2012FairSatisfactoryGoodGood4000956.2
September 2010FairSatisfactoryGoodGood3950059.0
September 2008FairSatisfactoryGoodGood3769859.0
August 2006FairSatisfactoryGoodGood1650065.8
May 2004FairSatisfactoryGoodGood1650065.8
September 2003FairSatisfactoryGoodGood1650065.8
July 2002FairSatisfactoryGoodGood1650065.8
December 2001FairSatisfactoryGoodGood1650065.8
June 2000FairSatisfactoryGoodGood1650065.8
September 1999GoodGoodGoodGood1650065.8
May 1998GoodGoodGoodGood1650065.8
April 1997GoodGoodGoodGood1650063.5

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Steel Girder/Beamlinear ft.256256000
Steel Protective Coatingsq. ft.4,9564,695024813
Prestressed Concrete Girder/Beamlinear ft.22,21022,209010
Steel Stringerlinear ft.3,0123,012000
Steel Protective Coatingsq. ft.58,31555,24002,928147
Deck
Reinforced Concrete Decksq. ft.135,500135,500000
Superstructure
Steel Trusslinear ft.588587100
Steel Protective Coatingsq. ft.113,843107,84005,717286
Steel Floor Beamlinear ft.1,0081,008000
Steel Protective Coatingsq. ft.19,51618,486098050
Steel Gusset Plateeach6464000
Substructure
Reinforced Concrete Columneach5757000
Reinforced Concrete Pier Walllinear ft.648648000
Reinforced Concrete Abutmentlinear ft.112112000
Reinforced Concrete Pileeach55000
Steel Pier Caplinear ft.128128000
Steel Protective Coatingsq. ft.2,4782,34701247
Reinforced Concrete Pier Caplinear ft.998998000
Deck
Concrete Filled Grid Decksq. ft.19,39819,163210250
Joints
Strip Seal Jointlinear ft.385038500
Compression Jointlinear ft.100056440
Open Jointlinear ft.1590106053
Bearings
Elastomeric Bearingeach8483010
Movable Bearingeach43010
Enclosed/Concealed Bearingeach44000
Fixed Bearingeach1414000
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.714714000
Reinforced Concrete Bridge Raillinear ft.5,0305,030000