460th Avenue over Boswell Diversion Ditch


+44.64528, -97.00660
44°38'43" N, 97°00'24" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:460th Avenue over Boswell Diversion Ditch
Structure number:000000029240109
Location:5.9S & 1E of Castlewood
Purpose:Carries highway over waterway
Route classification:Local (Rural) [09]
Length of largest span:23.0 ft. [7.0 m]
Total length:118.1 ft. [36.0 m]
Roadway width between curbs:20.0 ft. [6.1 m]
Deck width edge-to-edge:21.0 ft. [6.4 m]
Owner:County Highway Agency [02]
Year built:1929
Historic significance:Bridge is eligible for the National Register of Historic Places [2]
Number of main spans:5
Main spans material:Steel [3]
Main spans 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:Fair
Status:Open, no restriction [A]
Average daily traffic:129 [as of 2016]
Truck traffic:2% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Satisfactory [6 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:Meets minimum tolerable limits to be left in place as is [4]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Better than present minimum criteria [7]
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]
Pier/abutment protection:Navigation protection not required [1]
Scour condition:Bridge with "unknown" foundation that has not been evaluated for scour. [U]
Sufficiency rating:67.7

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
June 2018FairFairSatisfactoryFair12967.7
June 2016FairFairSatisfactoryFair12953.0
June 2014FairSatisfactorySatisfactoryFair12954.0
June 2012FairSatisfactorySatisfactoryFair12970.5
August 2010FairSatisfactorySatisfactoryFair12970.5
September 2008FairFairSatisfactoryFair12969.5
August 2006FairFairSatisfactoryFair12969.5
July 2004FairFairSatisfactorySatisfactory12980.5
August 2002FairSatisfactorySatisfactorySatisfactory12979.5
July 2000FairFairSatisfactorySatisfactory12978.5
September 1998FairFairSatisfactorySatisfactory12976.5
August 1996FairSatisfactoryGoodSatisfactory12977.5
July 1994GoodGoodGoodGood12976.0
September 1992GoodGoodGoodGood12976.0
June 1990GoodGoodGoodGood12976.0