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

Good/Fair/Poor Condition:Good
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]
Sufficiency rating:65.0

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
June 201565.0GoodGoodVery GoodGoodFO105854
June 201365.0GoodGoodVery GoodGoodFO105854
June 201163.6GoodGoodVery GoodGood-105854
June 200963.6GoodGoodVery GoodGood-105854
May 200875.6GoodVery GoodVery GoodGood-105854
May 200675.6GoodVery GoodVery GoodGood-104504
May 200475.6GoodVery GoodVery GoodGood-91000
May 200264.6FairSatisfactoryGoodFair-91000
May 200064.6FairSatisfactoryGoodFair-91000
July 199869.6FairGoodGoodFair-91000
September 199666.0FairGoodVery GoodFair-89000
August 199478.0FairGoodVery GoodSatisfactory-89000
June 199278.0FairGoodVery GoodSatisfactory-89000
May 199078.0FairGoodVery GoodSatisfactory-89000