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M-3 (GRATIOT AVE) over I-375

Map

Coordinates:
+42.33980, -83.04160
42°20'23" N, 83°02'30" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:M-3 (GRATIOT AVE) over I-375
Structure number:000000000011799
Old structure number:82182251000S010 (from 1992 edition)
Location:DOWNTOWN DETROIT
Purpose:Carries highway and pedestrian walkway over highway
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:77.8 ft. [23.7 m]
Total length:298.9 ft. [91.1 m]
Roadway width between curbs:89.9 ft. [27.4 m]
Deck width edge-to-edge:119.8 ft. [36.5 m]
Vertical clearance below bridge:14.4 ft. [4.4 m]
Skew angle:17°
Owner:State Highway Agency [01]
Year built:1963
Year reconstructed:1996
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Number of main spans:5
Main spans material:Steel [3]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: December 2015

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:12,807 [as of 2007]
Truck traffic:9% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Very Good [8 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:Basically intolerable requiring high priority of replacement [2]
Underclearances appraisal:Basically intolerable requiring high priority of corrrective action [3]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Inventory rating:66.6 tons [60.5 metric tons]
Sufficiency rating:62.0

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
December 201562.0FairGoodVery GoodFairFO12807
January 201462.0FairGoodExcellentFairFO12807
January 201262.0FairGoodGoodFairFO12807
March 201062.0FairGoodGoodFairFO12807
July 200873.5GoodGoodVery GoodGoodFO12807
July 200673.8GoodGoodVery GoodGoodFO11335
July 200473.3GoodGoodVery GoodGood-14000
July 200273.3GoodGoodVery GoodGood-14000
May 200073.3FairSatisfactoryVery GoodGood-14000
September 199973.3GoodExcellentExcellentGood-14000
December 199873.3GoodExcellentExcellent--14000
December 199722.2PoorSeriousPoorSerious-14000
September 199620.8PoorSeriousPoorSerious-16000
October 199517.4PoorSeriousPoorSeriousSD19500
November 199239.2PoorPoorPoorPoorSD19500
March 199139.2PoorPoorPoorPoorSD19500

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Superstructure
Steel Girder/Beamlinear ft.6,5766,576000
Deck
Reinforced Concrete Decksq. ft.35,793035,79300
Substructure
Reinforced Concrete Columneach40200812
Reinforced Concrete Abutmentlinear ft.25021010300
Reinforced Concrete Pier Caplinear ft.50040040600
Joints
Strip Seal Jointlinear ft.37502251500
Pourable Jointlinear ft.3753550200
Bearings
Movable Bearingeach110110000
Fixed Bearingeach110110000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.5985237500