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M-3 (GRATIOT) over I-94

Map 

Coordinates:
+42.39136, -83.00639
42°23'29" N, 83°00'23" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.

Facts 

Name:M-3 (GRATIOT) over I-94
Structure number:000000000011245
Old structure number:82182025000S010 (from 1992 edition)
Location:IN DETROIT
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 2015 

Status:Open, no restriction [A]
Average daily traffic:31,939 [as of 2007]
Truck traffic:3% of total traffic
Deck condition:Serious [3 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]
Evaluation:Structurally deficient [1]
Sufficiency rating:47.0

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
October 201547.0Structurally deficientSeriousPoorSatisfactory31939
October 201462.0Structurally deficientSeriousFairSatisfactory31939
November 201362.0Structurally deficientSeriousFairSatisfactory31939
November 201272.0Structurally deficientSeriousSatisfactorySatisfactory31939
December 201172.0Structurally deficientSeriousSatisfactoryGood31939
December 201072.0Structurally deficientSeriousSatisfactoryGood31939
December 200917.0Structurally deficientSeriousSatisfactoryGood31939
September 200817.0Structurally deficientSeriousFairFair31939
June 200717.0Structurally deficientSeriousFairFair33540
March 200617.0Structurally deficientSeriousFairFair33540
January 200517.0Structurally deficientSeriousFairFair27100
November 200317.0Structurally deficientSeriousFairFair27100
October 200217.0Structurally deficientSeriousFairFair27100
August 200117.0Structurally deficientSeriousFairFair27100
June 200017.0Structurally deficientSeriousFairFair27100
August 199962.0Structurally deficientSeriousFairFair27100
July 199847.0Structurally deficientSeriousPoorFair27100
June 199747.0Structurally deficientPoorPoorFair27100
June 199449.0Structurally deficientFairPoorSatisfactory27100
June 199249.0Structurally deficientFairPoorSatisfactory27100
May 199077.0Functionally obsoleteSatisfactorySatisfactorySatisfactory27100