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

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Steel Girder/Beamlinear ft.2,9002,80010000
Reinforced Concrete Decksq. ft.19,99919,77922000
Reinforced Concrete Columneach2424000
Reinforced Concrete Abutmentlinear ft.112112000
Reinforced Concrete Pier Caplinear ft.259254500
Strip Seal Jointlinear ft.223223000
Pourable Jointlinear ft.70601000
Movable Bearingeach5757000
Fixed Bearingeach5757000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.1,0831,078500