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


+42.34327, -83.04400
42°20'36" N, 83°02'38" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:M-3 NB CONN over I-75 & I-375
Structure number:000000000011808
Old structure number:82182251000S081 (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:44.0 ft. [13.4 m]
Deck width edge-to-edge:47.2 ft. [14.4 m]
Vertical clearance below bridge:16.1 ft. [4.9 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:Fair
Status:Open, no restriction [A]
Average daily traffic:22,748 [as of 2007]
Deck condition:Good [7 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Equal to present minimum criteria [6]
Underclearances appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Operating rating:70.6 tons [64.2 metric tons]
Inventory rating:42.5 tons [38.6 metric tons]
Sufficiency rating:99.0

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
November 201599.0FairGoodSatisfactoryGood-22748
March 201455.0PoorGoodSeriousGoodSD22748
March 201255.0PoorGoodSeriousGoodSD22748
April 201055.0PoorVery GoodSeriousGoodSD22748
May 200899.0FairVery GoodSatisfactoryGood-22748
May 200669.0PoorVery GoodFairPoor-28332
February 200573.0PoorVery GoodFairPoor-13480
November 200369.0PoorVery GoodFairPoor-13480
November 200269.0PoorVery GoodFairPoor-13480
August 200169.0PoorVery GoodFairPoor-13480
May 200069.0PoorVery GoodFairPoor-13480
September 199942.0PoorSeriousFairSerious-13480
August 199847.0PoorSeriousFairSerious-13480
July 199733.0PoorPoorFairSeriousSD13480
September 199668.0PoorPoorFairPoorSD13480
August 199484.0PoorPoorFairFairSD13480
August 199268.0PoorSatisfactorySatisfactoryPoorSD13480
June 199095.0FairSatisfactoryGoodSatisfactoryFO13480