+45.40218, -83.87816
45°24'08" N, 83°52'41" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:M-68 over TROUT RIVER
Structure number:000000000008955
Old structure number:71171021000B060 (from 1992 edition)
Location:2.2 MI W OF US-23
Purpose:Carries highway over waterway
Route classification:Minor Arterial (Rural) [06]
Length of largest span:40.0 ft. [12.2 m]
Total length:40.0 ft. [12.2 m]
Roadway width between curbs:38.1 ft. [11.6 m]
Deck width edge-to-edge:43.6 ft. [13.3 m]
Skew angle:30°
Owner:State Highway Agency [01]
Year built:1956
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Main span material:Concrete [1]
Main span design:Tee beam [04]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: May 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:1,564 [as of 2007]
Truck traffic:5% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Very Good [8 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Better than present minimum criteria [7]
Deck geometry appraisal:Equal to present minimum criteria [6]
Water adequacy appraisal:Better than present minimum criteria [7]
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 is scour critical; bridge foundations determined to be unstable. [3]
Sufficiency rating:93.2

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
May 2017FairSatisfactoryVery GoodGood156493.2
August 2015FairSatisfactoryVery GoodGood156493.2
August 2013FairSatisfactoryVery GoodGood156493.2
August 2011FairSatisfactoryVery GoodGood156493.2
August 2009FairSatisfactoryVery GoodGood156493.2
August 2007FairSatisfactoryVery GoodGood205891.6
August 2005FairSatisfactoryVery GoodGood205891.6
August 2003FairSatisfactoryVery GoodGood210091.5
October 2001FairSatisfactoryVery GoodGood210091.5
November 1999FairSatisfactoryVery GoodGood210096.6
October 1997FairSatisfactoryVery GoodGood210089.5
September 1995FairGoodVery GoodSatisfactory260088.9
July 1993FairGoodVery GoodSatisfactory260088.9
April 1991FairVery GoodVery GoodSatisfactory260088.9