Structure 7934 · Oakland County, MI

Coolidge Road U Tu over I-696

Carries Coolidge Road U Tu over I-696, East Of Coolidge.

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 FT154 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

154 ft end to end, longest span 77 ft: about 2 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.

Built198541 years old
Length153.9 ft46.9 m
Daily traffic1,500counted 1982
Last inspectedJuly 2024every 24 months

Location

StateMichigan
CountyOakland
LocationEast Of Coolidge
CarriesCoolidge Road U Tu
CrossesI-696
Coordinates42.47466, -83.18092

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length153.9 ft (46.9 m)
Max Span77.1 ft (23.5 m)
Deck Width76.4 ft (23.3 m)
Deck Area1092.8 sq m
Main Spans2
Year Built1985

Traffic

Avg Daily Traffic1,500 (1982)
Truck Traffic3%
Lanes On Bridge2
Lanes Under Bridge8

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 Number000000000007934

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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