+43.37109, -92.80418
43°22'16" N, 92°48'15" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:420TH over BURR OAK CREEK
Structure number:000000000248640
Purpose:Carries highway over waterway
Route classification:Local (Rural) [09]
Length of largest span:29.9 ft. [9.1 m]
Total length:29.9 ft. [9.1 m]
Roadway width between curbs:24.0 ft. [7.3 m]
Deck width edge-to-edge:25.9 ft. [7.9 m]
Owner:County Highway Agency [02]
Year built:1966
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:M 13.5 / H 15 [2]
Main span material:Concrete [1]
Main span design:Channel beam [22]
Deck type:Concrete Precast Panels [2]
Wearing surface:Gravel [8]

Latest Available Inspection: December 2017

Good/Fair/Poor Condition:Poor
Status:Posted for load [P]
Average daily traffic:15 [as of 2017]
Deck condition:Good [7 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:Superior to present desirable criteria [9]
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 the assessed or calculated scour condition. [8]
Sufficiency rating:55.8
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
December 2017PoorGoodSatisfactoryPoor1555.8
January 2016PoorGoodSatisfactoryPoor1555.8
February 2014PoorGoodSatisfactoryPoor1555.8
February 2012PoorGoodSatisfactoryPoor1555.8
March 2010PoorGoodGoodPoor1555.4
February 2008FairGoodGoodFair1571.4
January 2006FairVery GoodVery GoodFair1571.8
August 2004FairVery GoodVery GoodFair1571.8
February 2002GoodVery GoodVery GoodVery Good1581.8
January 2000GoodVery GoodVery GoodVery Good4081.8
November 1997GoodVery GoodVery GoodVery Good4081.4
July 1996GoodVery GoodVery GoodVery Good4081.4
May 1994GoodVery GoodVery GoodVery Good4081.4
May 1992GoodVery GoodVery GoodVery Good581.4
May 1990GoodVery GoodVery GoodVery Good581.4