Structure 6268 · Macomb County, MI

North AVE over Coon Creek

Carries North AVE over Coon Creek, 0.3 Mi North Of 31 Mile.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT32 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 32 ft across. Lengths and the car 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, so those are drawn as typical for a culvert.

Built199927 years old
Length31.8 ft9.7 m
Daily traffic7,160counted 2010
Last inspectedMay 2023every 24 months

Location

StateMichigan
CountyMacomb
Location0.3 Mi North Of 31 Mile
CarriesNorth AVE
CrossesCoon Creek
Coordinates42.79471, -82.88297

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length31.8 ft (9.7 m)
Max Span31.8 ft (9.7 m)
Deck Area126.1 sq m
Main Spans1
Year Built1999

Traffic

Avg Daily Traffic7,160 (2010)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000006268

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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