+45.74064, -102.98733
45°44'26" N, 102°59'14" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:SD079 over BIG NASTY CK
Structure number:000000032518145
Location:13.7 N JCT SD 20
Purpose:Carries highway over waterway
Route classification:Major Collector (Rural) [07]
Length of largest span:89.2 ft. [27.2 m]
Total length:233.9 ft. [71.3 m]
Roadway width between curbs:29.9 ft. [9.1 m]
Deck width edge-to-edge:32.2 ft. [9.8 m]
Owner:State Highway Agency [01]
Year built:1962
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:M 18 / H 20 [4]
Number of main spans:3
Main spans material:Steel continuous [4]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Epoxy Overlay [5]

Latest Available Inspection: July 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:279 [as of 2017]
Truck traffic:23% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck geometry appraisal:Equal to present minimum criteria [6]
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]
Scour condition:Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Sufficiency rating:87.1

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
July 2017FairFairFairGood27987.1
July 2015FairFairFairGood31587.0
July 2013FairFairFairGood31087.0
July 2011FairFairFairGood14787.7
July 2009FairSatisfactoryFairGood15488.7
June 2007FairGoodSatisfactoryGood20099.6
July 2005FairFairFairGood22087.5
July 2003FairFairFairGood24787.5
September 2001PoorPoorFairGood28285.4
October 1999PoorSeriousFairGood24083.4
October 1997PoorPoorSatisfactoryGood27596.5
October 1995FairFairSatisfactoryGood30698.4
October 1993FairFairSatisfactoryGood39997.2
September 1992FairGoodSatisfactoryGood35097.4
September 1990FairGoodSatisfactoryGood32297.5