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US 20 over JOHNSON CREEK

Map

Coordinates:
+43.34222, -114.75444
43°20'32" N, 114°45'16" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:US 20 over JOHNSON CREEK
Structure number:000000000015060
Location:1.9 E. FAIRFIELD
Purpose:Carries highway over waterway
Route classification:Principal Arterial - Other (Rural) [02]
Length of largest span:22.0 ft. [6.7 m]
Total length:24.0 ft. [7.3 m]
Roadway width between curbs:27.9 ft. [8.5 m]
Deck width edge-to-edge:30.5 ft. [9.3 m]
Owner:State Highway Agency [01]
Year built:1958
Historic significance:Bridge is possibly eligible for the National Register of Historic Places [3]
Design load:MS 18 / HS 20 [5]
Main span material:Concrete [1]
Main span design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: May 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:1,800 [as of 2015]
Truck traffic:12% of total traffic
Deck condition:Satisfactory [6 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:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Bank is beginning to slump. River control devices and embankment protection have widespread minor damage. There is minor stream bed movement evident. Debris is restricting the channel slightly. [6]
Scour condition:Bridge is scour critical; bridge foundations determined to be unstable. [3]
Sufficiency rating:71.6
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$436,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
May 2017FairSatisfactorySatisfactorySatisfactory180071.6
May 2015FairSatisfactorySatisfactorySatisfactory180071.6
May 2013FairSatisfactorySatisfactorySatisfactory180070.6
May 2012FairSatisfactorySatisfactorySatisfactory190070.5
May 2011FairSatisfactorySatisfactorySatisfactory220069.5
May 2010FairSatisfactorySatisfactorySatisfactory220069.5
May 2009FairSatisfactorySatisfactorySatisfactory180070.6
October 2008FairSatisfactorySatisfactorySatisfactory180067.4
October 2006FairSatisfactorySatisfactorySatisfactory180067.4
October 2004FairSatisfactorySatisfactorySatisfactory160067.4
October 2002FairSatisfactorySatisfactorySatisfactory160067.4
October 2000FairSatisfactorySatisfactorySatisfactory190067.4
October 1998FairSatisfactoryGoodSatisfactory190067.4
October 1996GoodGoodGoodGood130067.4
October 1994GoodGoodGoodGood130069.2
October 1992GoodGoodGoodGood121070.0
October 1990GoodGoodGoodGood121070.0

Element Data

Source: National Bridge Elements dataset, 2018 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Reinforced Concrete Girder/Beamlinear ft.1941593500
Deck
Reinforced Concrete Decksq. ft.7327062600
Wearing Surfacessq. ft.670670000
Substructure
Reinforced Concrete Abutmentlinear ft.62154700
Reinforced Concrete Pile Cap/Footinglinear ft.40400
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.49250240
Steel Protective Coatingsq. ft.225225000