M-66 over CLAM RIVER


+44.24294, -85.21509
44°14'35" N, 85°12'54" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:M-66 over CLAM RIVER
Structure number:000000000007025
Old structure number:57157011000B030 (from 1992 edition)
Location:3.6 MI N OF MCBAIN
Purpose:Carries highway over waterway
Route classification:Minor Arterial (Rural) [06]
Length of largest span:44.9 ft. [13.7 m]
Total length:44.9 ft. [13.7 m]
Roadway width between curbs:29.9 ft. [9.1 m]
Deck width edge-to-edge:36.4 ft. [11.1 m]
Skew angle:30°
Owner:State Highway Agency [01]
Year built:1929
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:Steel [3]
Main span design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Epoxy Overlay [5]

Latest Available Inspection: August 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:2,696 [as of 2007]
Truck traffic:5% of total traffic
Deck condition:Very Good [8 out of 9]
Superstructure condition:Good [7 out of 9]
Substructure condition:Satisfactory [6 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 desirable criteria [8]
Roadway alignment appraisal:Equal to present desirable criteria [8]
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:87.5
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$39,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
August 2018FairVery GoodGoodSatisfactory269687.5
August 2016FairVery GoodGoodSatisfactory269687.5
September 2014FairVery GoodVery GoodSatisfactory269687.5
September 2012FairVery GoodVery GoodSatisfactory269687.5
September 2010FairVery GoodVery GoodSatisfactory269687.5
September 2008FairVery GoodVery GoodSatisfactory269687.5
September 2006FairVery GoodVery GoodSatisfactory369762.1
November 2005FairExcellentVery GoodSatisfactory369762.1
September 2004PoorFairPoorSatisfactory330034.1
October 2002FairFairFairSatisfactory330050.6
October 2000FairFairFairSatisfactory330050.5
October 1998FairFairFairSatisfactory330051.5
October 1996FairVery GoodFairGood330052.6
October 1994FairFairSatisfactoryGood290061.7
April 1992FairFairSatisfactoryGood290073.6
October 1990FairFairSatisfactoryGood290073.6