M-48 over I-75

Map

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

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]`

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]`

Date	Condition	Deck	Superstructure	Substructure	ADT	Suff. Rating
June 2018	Fair	Good	Satisfactory	Fair	1175	71.0
June 2016	Fair	Good	Satisfactory	Fair	1175	71.0
June 2014	Fair	Good	Satisfactory	Fair	1175	71.0
June 2012	Fair	Good	Satisfactory	Fair	1175	71.0
June 2010	Fair	Satisfactory	Satisfactory	Fair	1175	71.0
June 2008	Fair	Good	Satisfactory	Satisfactory	1175	79.2
June 2006	Fair	Good	Satisfactory	Satisfactory	1417	79.2
June 2004	Fair	Good	Satisfactory	Satisfactory	1100	79.2
June 2002	Fair	Good	Satisfactory	Satisfactory	1100	79.2
July 2000	Fair	Good	Satisfactory	Good	1100	79.2
September 1998	Fair	Good	Satisfactory	Good	1100	81.7
September 1996	Fair	Good	Satisfactory	Fair	1100	68.2
October 1994	Fair	Good	Satisfactory	Fair	700	72.4
September 1992	Fair	Good	Satisfactory	Fair	700	75.5
October 1990	Fair	Good	Satisfactory	Satisfactory	700	86.5