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SR 20 EXTENSION over KEYSTONE HARBOR

Map

Coordinates:
+48.15936, -122.67272
48°09'34" N, 122°40'22" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:SR 20 EXTENSION over KEYSTONE HARBOR
Structure number:0001697A0000000
Location:3.4 W JCT SR 525
Purpose:Carries highway and pedestrian walkway over waterway
Route classification:Principal Arterial - Other (Rural) [02]
Tolls:Yes [1]
Length of largest span:80.1 ft. [24.4 m]
Total length:105.0 ft. [32.0 m]
Roadway width between curbs:20.0 ft. [6.1 m]
Deck width edge-to-edge:24.0 ft. [7.3 m]
Vertical clearance above deck:16.1 ft. [4.9 m]
Owner:State Highway Agency [01]
Year built:1979
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Number of main spans:2
Main spans material:Steel [3]
Main spans design:Movable - Lift [15]
Deck type:Closed Grating [4]
Wearing surface:Epoxy Overlay [5]

Latest Available Inspection: June 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:1,863 [as of 2010]
Truck traffic:2% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Basically intolerable requiring high priority of replacement [2]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift. [7]
Pier/abutment protection:In place and functioning [2]
Scour condition:Bridge is scour critical; bridge foundations determined to be unstable. [3]
Sufficiency rating:50.2
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$1,008,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
June 2017FairFairSatisfactorySatisfactory186350.2
June 2015FairFairSatisfactorySatisfactory186350.0
June 2013FairFairSatisfactorySatisfactory186350.0
June 2011FairSatisfactorySatisfactorySatisfactory186351.0
June 2010FairSatisfactorySatisfactorySatisfactory97547.8
June 2008FairSatisfactorySatisfactorySatisfactory97565.6
June 2006FairSatisfactorySatisfactorySatisfactory155060.9
July 2005FairSatisfactorySatisfactorySatisfactory109057.9
July 2004FairSatisfactorySatisfactorySatisfactory109057.9
April 2003FairSatisfactorySatisfactorySatisfactory109057.9
June 2001FairSatisfactorySatisfactorySatisfactory109056.0
August 2000FairSatisfactorySatisfactorySatisfactory109056.0
April 1999FairSatisfactorySatisfactorySatisfactory109056.0
May 1998FairSatisfactorySatisfactorySatisfactory109056.0
May 1997FairSatisfactorySatisfactorySatisfactory109058.5
May 1996FairSatisfactorySatisfactorySatisfactory109058.6
April 1994FairSatisfactorySatisfactorySatisfactory61146.5

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Steel Girder/Beamlinear ft.180174060
Steel Protective Coatingsq. ft.1,0069920131
Steel Stringerlinear ft.4504050450
Steel Protective Coatingsq. ft.2,5172,4820341
Steel Floor Beamlinear ft.2722510210
Steel Protective Coatingsq. ft.1,5211,5000201
Steel Pin or Pin & Hangar Assemblyeach43010
Substructure
Reinforced Concrete Abutmentlinear ft.3029010
Steel Pileeach88000
Steel Protective Coatingsq. ft.4444000
Reinforced Concrete Pier Caplinear ft.9696000
Deck
Concrete Filled Grid Decksq. ft.1,80090009000
Wearing Surfacessq. ft.1,80001,735065
Joints
Assembly without Seal Jointlinear ft.2002000
Bearings
Fixed Bearingeach20020
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.2828000