SD020 over SIOUX CK


+45.54023, -103.24763
45°32'25" N, 103°14'51" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:SD020 over SIOUX CK
Structure number:000000032395284
Location:14.8 E JCT US 85
Purpose:Carries highway over waterway
Route classification:Minor Arterial (Rural) [06]
Length of largest span:33.1 ft. [10.1 m]
Total length:128.0 ft. [39.0 m]
Roadway width between curbs:29.9 ft. [9.1 m]
Deck width edge-to-edge:34.5 ft. [10.5 m]
Owner:State Highway Agency [01]
Year built:1959
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:4
Main spans material:Concrete continuous [2]
Main spans design:Slab [01]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Low slump Concrete [4]

Latest Available Inspection: May 2017

Good/Fair/Poor Condition:Poor
Status:Open, no restriction [A]
Average daily traffic:173 [as of 2017]
Truck traffic:27% of total traffic
Deck condition:Poor [4 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Poor [4 out of 9]
Structural appraisal:Meets minimum tolerable limits to be left in place as is [4]
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: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]
Scour condition:Bridge is scour critical; bridge foundations determined to be unstable. [3]
Sufficiency rating:61.9

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
May 2017PoorPoorSatisfactoryPoor17361.9
May 2015PoorPoorSatisfactoryFair17378.3
May 2013PoorPoorSatisfactoryFair17078.3
May 2011FairFairSatisfactoryFair17180.4
May 2009FairFairSatisfactorySatisfactory17291.5
April 2007FairFairSatisfactorySatisfactory17591.5
May 2005FairSatisfactorySatisfactoryGood16892.5
May 2003FairSatisfactorySatisfactoryGood15892.6
September 2001FairSatisfactorySatisfactoryGood17092.5
October 1999GoodGoodGoodGood16392.6
October 1997GoodGoodGoodGood19592.4
October 1995GoodGoodGoodGood18992.4
October 1993GoodGoodGoodGood11591.7
February 1992FairVery GoodGoodSatisfactory18392.5