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I-75 over M-85 (FORT ST)

Map

Coordinates:
+42.27822, -83.15372
42°16'42" N, 83°09'13" W

Facts

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)
Location:IN DETROIT
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

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Superstructure
Prestressed Concrete Girder/Beamlinear ft.5,9805,980000
Deck
Reinforced Concrete Decksq. ft.45,90845,65825000
Substructure
Reinforced Concrete Columneach4545000
Reinforced Concrete Abutmentlinear ft.310310000
Reinforced Concrete Pier Caplinear ft.461461000
Joints
Strip Seal Jointlinear ft.307307000
Pourable Jointlinear ft.3072310760
Bearings
Elastomeric Bearingeach140140000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.1,19659859800