+46.85206, -89.38662
46°51'07" N, 89°23'12" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:M-64 over POTATO RIVER
Structure number:000000000008476
Old structure number:66166013000B090 (from 1992 edition)
Location:3.6 MI SW OF US-45
Purpose:Carries highway over waterway
Route classification:Minor Arterial (Rural) [06]
Length of largest span:59.7 ft. [18.2 m]
Total length:149.9 ft. [45.7 m]
Roadway width between curbs:27.9 ft. [8.5 m]
Deck width edge-to-edge:33.5 ft. [10.2 m]
Owner:State Highway Agency [01]
Year built:1952
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Number of main spans:3
Main spans material:Steel [3]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: August 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:2,025 [as of 2013]
Truck traffic:5% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Meets minimum tolerable limits to be left in place as is [4]
Water adequacy appraisal:Equal to present minimum criteria [6]
Roadway alignment appraisal:Equal to present minimum criteria [6]
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 is scour critical; bridge foundations determined to be unstable. [3]
Sufficiency rating:73.7
Recommended work:Bridge deck replacement with only incidental widening. [37]
Estimated cost of work:$115,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
August 2018FairGoodSatisfactoryGood202573.7
August 2016FairGoodSatisfactoryGood202573.7
August 2014GoodGoodGoodGood202573.7
October 2013GoodGoodGoodGood202573.7
August 2012FairGoodSatisfactoryGood211773.2
August 2010GoodGoodGoodGood211773.2
August 2008GoodGoodGoodGood211773.2
August 2006GoodGoodGoodGood218472.8
August 2004GoodGoodGoodGood260070.6
August 2002GoodVery GoodGoodGood260070.6
August 2000GoodGoodGoodGood260070.5
September 1998GoodGoodGoodGood260076.5
September 1996GoodGoodGoodGood260068.8
October 1994PoorPoorGoodGood210066.9
September 1992GoodGoodGoodGood210070.4
September 1990FairGoodGoodSatisfactory210070.4