Structure 7942 · Oakland County, MI

Mohawk Avenue over I-696

Carries Mohawk Avenue over I-696, In Royal Oak.

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 FT180 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

180 ft end to end, longest span 91 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.

Built198343 years old
Length180.1 ft54.9 m
Daily traffic4,500counted 1993
Last inspectedJuly 2024every 24 months

Location

StateMichigan
CountyOakland
LocationIn Royal Oak
CarriesMohawk Avenue
CrossesI-696
Coordinates42.47578, -83.13308

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length180.1 ft (54.9 m)
Max Span90.6 ft (27.6 m)
Deck Width91.5 ft (27.9 m)
Deck Area1531.7 sq m
Main Spans2
Year Built1983

Traffic

Avg Daily Traffic4,500 (1993)
Truck Traffic3%
Lanes On Bridge4
Lanes Under Bridge10

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000007942

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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