306TH ST. over DIBBLE CR


+43.07817, -91.62984
43°04'41" N, 91°37'47" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:306TH ST. over DIBBLE CR
Structure number:000000000152681
Purpose:Carries highway over waterway
Route classification:Local (Rural) [09]
Length of largest span:60.0 ft. [18.3 m]
Total length:62.0 ft. [18.9 m]
Roadway width between curbs:21.0 ft. [6.4 m]
Deck width edge-to-edge:21.3 ft. [6.5 m]
Owner:County Highway Agency [02]
Year built:1971
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Main span material:Steel [3]
Main span design:Truss - Thru [10]
Deck type:Wood or Timber [8]
Wearing surface:Gravel [8]

Latest Available Inspection: November 2017

Good/Fair/Poor Condition:Fair
Status:Posted for other load-capacity restriction [R]
Average daily traffic:35 [as of 2017]
Deck condition:Fair [5 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:Equal to present minimum criteria [6]
Roadway alignment appraisal:Equal to present minimum criteria [6]
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]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Sufficiency rating:69.4
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
November 2017FairFairFairFair3569.4
October 2015FairSatisfactorySatisfactoryFair3570.4
August 2013FairGoodGoodFair3570.4
September 2011FairVery GoodGoodFair3568.6
August 2009FairVery GoodGoodFair4568.3
October 2007FairVery GoodGoodFair4568.7
August 2005FairVery GoodGoodFair4568.7
July 2003FairVery GoodGoodFair4568.7
August 2001FairVery GoodGoodFair4568.7
July 1999FairVery GoodGoodFair4068.7
August 1997FairVery GoodGoodFair4068.7
May 1995FairVery GoodGoodFair4068.7
August 1993FairVery GoodGoodFair3568.7
August 1991PoorVery GoodGoodPoor3552.7