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M-48 over I-75

Map

Coordinates:
+46.23054, -84.56095
46°13'50" N, 84°33'39" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:M-48 over I-75
Structure number:000000000001577
Old structure number:17117033000S020 (from 1992 edition)
Location:5.0 MI N OF MACKINAC COL
Purpose:Carries highway over highway
Route classification:Major Collector (Rural) [07]
Length of largest span:71.9 ft. [21.9 m]
Total length:672.9 ft. [205.1 m]
Roadway width between curbs:25.6 ft. [7.8 m]
Deck width edge-to-edge:30.8 ft. [9.4 m]
Vertical clearance below bridge:13.1 ft. [4.0 m]
Owner:State Highway Agency [01]
Year built:1963
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:M 13.5 / H 15 [2]
Number of main spans:12
Main spans material:Steel [3]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Latex Concrete or similar additive [3]

Latest Available Inspection: June 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:1,175 [as of 2007]
Truck traffic:9% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Satisfactory [6 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:Meets minimum tolerable limits to be left in place as is [4]
Underclearances appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Roadway alignment appraisal:Equal to present minimum criteria [6]
Scour condition:Bridge not over waterway. [N]
Sufficiency rating:71.0
Recommended work:Bridge deck replacement with only incidental widening. [37]

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
June 2018FairGoodSatisfactoryFair117571.0
June 2016FairGoodSatisfactoryFair117571.0
June 2014FairGoodSatisfactoryFair117571.0
June 2012FairGoodSatisfactoryFair117571.0
June 2010FairSatisfactorySatisfactoryFair117571.0
June 2008FairGoodSatisfactorySatisfactory117579.2
June 2006FairGoodSatisfactorySatisfactory141779.2
June 2004FairGoodSatisfactorySatisfactory110079.2
June 2002FairGoodSatisfactorySatisfactory110079.2
July 2000FairGoodSatisfactoryGood110079.2
September 1998FairGoodSatisfactoryGood110081.7
September 1996FairGoodSatisfactoryFair110068.2
October 1994FairGoodSatisfactoryFair70072.4
September 1992FairGoodSatisfactoryFair70075.5
October 1990FairGoodSatisfactorySatisfactory70086.5