M-3 SB CONN over I-75 & I-375


+42.34366, -83.04361
42°20'37" N, 83°02'37" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:M-3 SB CONN over I-75 & I-375
Structure number:000000000011809
Old structure number:82182251000S082 (from 1992 edition)
Location:IN DETROIT OVER I-375
Purpose:Carries highway over highway
Route classification:Principal Arterial - Other Freeways or Expressways (Urban) [12]
Length of largest span:79.1 ft. [24.1 m]
Total length:361.6 ft. [110.2 m]
Roadway width between curbs:41.0 ft. [12.5 m]
Deck width edge-to-edge:44.6 ft. [13.6 m]
Vertical clearance below bridge:17.7 ft. [5.4 m]
Skew angle:12°
Owner:State Highway Agency [01]
Year built:1964
Year reconstructed:1998
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18+Mod / HS 20+Mod [6]
Number of main spans:7
Main spans material:Steel [3]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Monolithic Concrete (concurrently placed with structural deck) [1]

Latest Available Inspection: November 2015 

Good/Fair/Poor Condition:Good
Status:Open, no restriction [A]
Average daily traffic:22,748 [as of 2007]
Deck condition:Good [7 out of 9]
Superstructure condition:Good [7 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Better than present minimum criteria [7]
Deck geometry appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Underclearances appraisal:Equal to present minimum criteria [6]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Operating rating:71.9 tons [65.4 metric tons]
Inventory rating:43.1 tons [39.2 metric tons]
Sufficiency rating:99.0

Previous Inspections 

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
November 201599.0GoodGoodGoodGood-22748
March 201455.0PoorGoodSeriousGoodSD22748
March 201255.0PoorGoodSeriousGoodSD22748
April 201055.0PoorVery GoodSeriousVery GoodSD22748
May 200899.0FairVery GoodSatisfactoryGood-22748
May 200668.0PoorVery GoodPoorSatisfactory-14166
February 200572.0PoorVery GoodPoorFair-10110
November 200368.0PoorVery GoodPoorFair-10110
August 200168.0PoorVery GoodPoorFair-10110
August 199858.0PoorSeriousPoorPoor-10110
July 199749.0PoorSeriousPoorPoorSD10110
September 199669.0PoorPoorFairPoorSD10110
August 199485.0PoorPoorFairFairSD10110
August 199287.0FairFairSatisfactoryFair-10110
June 199098.0FairFairGoodSatisfactory-10110