181st Street over Big Sioux River


+44.76074, -97.05000
44°45'39" N, 97°02'60" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:181st Street over Big Sioux River
Structure number:000000029218030
Location:2N & 1.2W of Castlewood
Purpose:Carries highway over waterway
Route classification:Minor Collector (Rural) [08]
Length of largest span:91.9 ft. [28.0 m]
Total length:96.1 ft. [29.3 m]
Roadway width between curbs:24.0 ft. [7.3 m]
Deck width edge-to-edge:32.2 ft. [9.8 m]
Owner:County Highway Agency [02]
Year built:2016
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Main span material:Prestressed concrete [5]
Main span design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Integral Concrete (separate non-modified layer of concrete added to structural deck) [2]

Latest Available Inspection: June 2018

Good/Fair/Poor Condition:Good
Status:Open, no restriction [A]
Average daily traffic:66 [as of 2016]
Truck traffic:2% of total traffic
Deck condition:Very Good [8 out of 9]
Superstructure condition:Very Good [8 out of 9]
Substructure condition:Very Good [8 out of 9]
Structural appraisal:Equal to present desirable criteria [8]
Deck geometry appraisal:Equal to present minimum criteria [6]
Water adequacy appraisal:Superior to present desirable criteria [9]
Roadway alignment appraisal:Superior to present desirable criteria [9]
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 foundations determined to be stable for the assessed or calculated scour condition. [8]
Sufficiency rating:100.0

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
June 2018GoodVery GoodVery GoodVery Good66100.0
November 2016GoodVery GoodVery GoodVery Good66100.0
May 2014PoorSatisfactorySeriousCritical6640.9
June 2012PoorSatisfactorySeriousCritical6640.9
August 2010PoorSatisfactoryPoorFair6640.9
August 2008PoorSatisfactoryPoorFair6640.9
August 2006FairSatisfactoryFairFair6649.4
July 2004FairSatisfactoryFairFair6649.4
August 2002FairSatisfactoryFairSatisfactory6648.4
July 2000FairSatisfactoryFairSatisfactory6648.4
September 1998FairSatisfactoryFairSatisfactory6648.4
August 1996FairGoodSatisfactoryFair6648.4
August 1994FairGoodSatisfactoryFair6648.1
September 1992FairGoodSatisfactoryFair6655.3
June 1990FairSatisfactorySatisfactoryFair6668.8