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DENALI HIGHWAY over SUSITNA RIVER

Map

Coordinates:
+63.10480, -147.52100
63°06'17" N, 147°31'16" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:DENALI HIGHWAY over SUSITNA RIVER
Structure number:0687
Location:MILE POINT 79.5
Purpose:Carries highway over waterway
Route classification:Major Collector (Rural) [07]
Length of largest span:164.7 ft. [50.2 m]
Total length:1039.1 ft. [316.7 m]
Roadway width between curbs:20.0 ft. [6.1 m]
Deck width edge-to-edge:20.0 ft. [6.1 m]
Owner:State Highway Agency [01]
Year built:1956
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:M 13.5 / H 15 [2]
Main span material:Steel [3]
Main span design:Truss - Deck [09]
Deck type:Wood or Timber [8]
Wearing surface:Wood or Timber [7]

Latest Available Inspection: July 2017

Good/Fair/Poor Condition:Fair
Status:Open, would be posted or closed except for temporary shoring [D]
Average daily traffic:80 [as of 2016]
Truck traffic:8% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Fair [5 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck geometry appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Water adequacy appraisal:Better than present minimum criteria [7]
Roadway alignment appraisal:Equal to present minimum criteria [6]
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:Navigation protection not required [1]
Scour condition:Bridge is scour critical; bridge foundations determined to be unstable. [3]
Sufficiency rating:67.6

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
July 2017FairSatisfactoryFairFair8067.6
July 2015FairSatisfactoryFairFair7967.6
July 2013PoorSatisfactorySeriousFair7435.1
July 2011FairSatisfactorySatisfactoryFair8464.7
July 2009FairSatisfactorySatisfactoryFair7064.9
July 2007FairSatisfactorySatisfactoryFair6266.4
July 2005FairSatisfactorySatisfactoryFair7766.2
July 2003FairSatisfactorySatisfactoryFair7566.2
June 2001FairFairFairFair10153.5
August 1999FairFairFairFair17552.3
June 1997PoorFairSeriousFair18019.2
June 1995PoorGoodSeriousGood15024.0
June 1993PoorGoodSeriousGood11425.5
May 1991FairGoodSatisfactoryGood7578.5

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Steel Girder/Beamlinear ft.3,4802,61087000
Steel Protective Coatingsq. ft.29,10021,6457,2750180
Steel Stringerlinear ft.66033033000
Steel Protective Coatingsq. ft.3,3402,840150150200
Steel Trusslinear ft.330173140170
Steel Protective Coatingsq. ft.7,7802,6102,0002,0001,170
Steel Floor Beamlinear ft.2001257500
Steel Protective Coatingsq. ft.1,450920125125280
Steel Gusset Plateeach36132030
Steel Protective Coatingsq. ft.7,2003,0902,5001,250360
Substructure
Timber Abutmentlinear ft.5045500
Steel Pileeach9170795
Steel Protective Coatingsq. ft.6,3303,1641,5831,5830
Steel Pier Caplinear ft.3503153500
Steel Protective Coatingsq. ft.3,6802,76092000
Deck
Timber Decksq. ft.20,78017,6632,0781,0390
Wearing Surfacessq. ft.20,78019,7411,03900
Bearings
Movable Bearingeach3403220
Steel Protective Coatingsq. ft.340010217068
Fixed Bearingeach9409400
Steel Protective Coatingsq. ft.9400282470188
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.2,0801,87220800
Steel Protective Coatingsq. ft.12,47011,2231,24700