Structure 11768 · Wayne County, MI

I-75 NB over M-10

Carries I-75 NB over M-10, In Detroit Over Us-10.

Overall conditionFair

Set by its lowest-rated component: Deck at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT240 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

240 ft end to end, longest span 124 ft: about 3 semi-trucks nose to tail. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built1970rebuilt 1999
Length239.8 ft73.1 m
Daily traffic43,891counted 2007
Last inspectedMay 2023every 24 months

Location

StateMichigan
CountyWayne
LocationIn Detroit Over Us-10
CarriesI-75 NB
CrossesM-10
Coordinates42.33531, -83.06400

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length239.8 ft (73.1 m)
Max Span124.0 ft (37.8 m)
Deck Width61.4 ft (18.7 m)
Deck Area1367.0 sq m
Main Spans2
Year Built1970 (reconstructed 1999)

Traffic

Avg Daily Traffic43,891 (2007)
Truck Traffic10%
Lanes On Bridge3
Lanes Under Bridge8

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000011768

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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