M-3 (GRATIOT) over I-94


+42.39136, -83.00639
42°23'29" N, 83°00'23" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:M-3 (GRATIOT) over I-94
Structure number:000000000011245
Old structure number:82182025000S010 (from 1992 edition)
Purpose:Carries highway and pedestrian walkway over highway
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:104.0 ft. [31.7 m]
Total length:284.1 ft. [86.6 m]
Roadway width between curbs:89.9 ft. [27.4 m]
Deck width edge-to-edge:111.9 ft. [34.1 m]
Vertical clearance below bridge:13.8 ft. [4.2 m]
Skew angle:45°
Owner:State Highway Agency [01]
Year built:1958
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:4
Main spans material:Steel [3]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Latex Concrete or similar additive [3]

Latest Available Inspection: October 2016

Good/Fair/Poor Condition:Poor
Status:Open, no restriction [A]
Average daily traffic:31,939 [as of 2007]
Truck traffic:3% of total traffic
Deck condition:Poor [4 out of 9]
Superstructure condition:Poor [4 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Meets minimum tolerable limits to be left in place as is [4]
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:Better than present minimum criteria [7]
Scour condition:Bridge not over waterway. [N]
Operating rating:88.1 tons [80.1 metric tons]
Inventory rating:52.7 tons [47.9 metric tons]
Sufficiency rating:47.0

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
October 201647.0PoorPoorPoorSatisfactorySD31939
October 201547.0PoorSeriousPoorSatisfactorySD31939
October 201462.0PoorSeriousFairSatisfactorySD31939
November 201362.0PoorSeriousFairSatisfactorySD31939
November 201272.0PoorSeriousSatisfactorySatisfactorySD31939
December 201172.0PoorSeriousSatisfactoryGoodSD31939
December 201072.0PoorSeriousSatisfactoryGoodSD31939
December 200917.0PoorSeriousSatisfactoryGoodSD31939
September 200817.0PoorSeriousFairFairSD31939
June 200717.0PoorSeriousFairFairSD33540
March 200617.0PoorSeriousFairFairSD33540
January 200517.0PoorSeriousFairFairSD27100
November 200317.0PoorSeriousFairFairSD27100
October 200217.0PoorSeriousFairFairSD27100
August 200117.0PoorSeriousFairFairSD27100
June 200017.0PoorSeriousFairFairSD27100
August 199962.0PoorSeriousFairFairSD27100
July 199847.0PoorSeriousPoorFairSD27100
June 199747.0PoorPoorPoorFairSD27100
June 199449.0PoorFairPoorSatisfactorySD27100
June 199249.0PoorFairPoorSatisfactorySD27100
May 199077.0FairSatisfactorySatisfactorySatisfactoryFO27100

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Steel Girder/Beamlinear ft.5,6481,1301,4121,4121,694
Reinforced Concrete Columneach3003000
Reinforced Concrete Abutmentlinear ft.31215615600
Reinforced Concrete Pier Caplinear ft.469334100350
Strip Seal Jointlinear ft.317031601
Pourable Jointlinear ft.158157001
Compression Jointlinear ft.317003170
Movable Bearingeach8008000
Fixed Bearingeach8008000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.56828428400
Reinforced Concrete Slabsq. ft.31,80212,72115,9013,1800
Wearing Surfacessq. ft.25,60611,52312,8031,2800