I-75 over M-85 (FORT ST)


+42.27822, -83.15372
42°16'42" N, 83°09'13" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:I-75 over M-85 (FORT ST)
Structure number:000000000011733
Old structure number:82182194000S050 (from 1992 edition)
Purpose:Carries highway over highway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:107.9 ft. [32.9 m]
Total length:298.9 ft. [91.1 m]
Roadway width between curbs:97.8 ft. [29.8 m]
Deck width edge-to-edge:153.6 ft. [46.8 m]
Vertical clearance below bridge:15.4 ft. [4.7 m]
Skew angle:50°
Owner:State Highway Agency [01]
Year built:1967
Year reconstructed:2002
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 22.5 / HS 25 [9]
Number of main spans:2
Main spans material:Steel continuous [4]
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: June 2015 

Status:Open, no restriction [A]
Average daily traffic:105,854 [as of 2007]
Truck traffic:12% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Very Good [8 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Better than present minimum criteria [7]
Deck geometry appraisal:Basically intolerable requiring high priority of replacement [2]
Underclearances appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Operating rating:66.9 tons [60.8 metric tons]
Inventory rating:39.9 tons [36.3 metric tons]
Evaluation:Functionally obsolete [2]
Sufficiency rating:65.0

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
June 201565.0Functionally obsoleteGoodVery GoodGood105854
June 201365.0Functionally obsoleteGoodVery GoodGood105854
June 201163.6Not deficientGoodVery GoodGood105854
June 200963.6Not deficientGoodVery GoodGood105854
May 200875.6Not deficientVery GoodVery GoodGood105854
May 200675.6Not deficientVery GoodVery GoodGood104504
May 200475.6Not deficientVery GoodVery GoodGood91000
May 200264.6Not deficientSatisfactoryGoodFair91000
May 200064.6Not deficientSatisfactoryGoodFair91000
July 199869.6Not deficientGoodGoodFair91000
September 199666.0Not deficientGoodVery GoodFair89000
August 199478.0Not deficientGoodVery GoodSatisfactory89000
June 199278.0Not deficientGoodVery GoodSatisfactory89000
May 199078.0Not deficientGoodVery GoodSatisfactory89000