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M-3 (GRATIOT AVE) over I-375

Map

Coordinates:
+42.34016, -83.04134
42°20'25" N, 83°02'29" 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:13.1 ft. [4.0 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: May 2017

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:Satisfactory [6 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: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]
Sufficiency rating:62.0

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
May 2017FairSatisfactorySatisfactoryFair1280762.0
December 2015FairGoodVery GoodFair1280762.0
January 2014FairGoodExcellentFair1280762.0
January 2012FairGoodGoodFair1280762.0
March 2010FairGoodGoodFair1280762.0
July 2008GoodGoodVery GoodGood1280773.5
July 2006GoodGoodVery GoodGood1133573.8
July 2004GoodGoodVery GoodGood1400073.3
July 2002GoodGoodVery GoodGood1400073.3
May 2000FairSatisfactoryVery GoodGood1400073.3
September 1999GoodExcellentExcellentGood1400073.3
December 1998GoodExcellentExcellent-1400073.3
December 1997PoorSeriousPoorSerious1400022.2
September 1996PoorSeriousPoorSerious1600020.8
October 1995PoorSeriousPoorSerious1950017.4
November 1992PoorPoorPoorPoor1950039.2
March 1991PoorPoorPoorPoor1950039.2

Element Data

Source: National Bridge Elements dataset, 2018 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Steel Girder/Beamlinear ft.21,57419,9341,64000
Deck
Reinforced Concrete Decksq. ft.385,2730385,27300
Substructure
Reinforced Concrete Columneach40208120
Reinforced Concrete Abutmentlinear ft.82068933980
Reinforced Concrete Pier Caplinear ft.1,6401,3121311970
Joints
Strip Seal Jointlinear ft.1,23007384920
Pourable Jointlinear ft.1,2311,1650660
Bearings
Movable Bearingeach110110000
Fixed Bearingeach110110000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.1,9621,71624600