Structure 13612 · Oakland County, MI

Cranbrook Road over Rouge River Branch

Carries Cranbrook Road over Rouge River Branch, West Of Woodward.

Overall conditionFair

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

How ratings work
Culvertsets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT26 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 6/9

A culvert 26 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.

Built201115 years old
Length25.6 ft7.8 m
Daily traffic3,880counted 2011
Last inspectedJanuary 2024every 24 months

Location

StateMichigan
CountyOakland
LocationWest Of Woodward
CarriesCranbrook Road
CrossesRouge River Branch
Coordinates42.57333, -83.24211

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length25.6 ft (7.8 m)
Max Span24.0 ft (7.3 m)
Deck Area56.9 sq m
Main Spans1
Year Built2011

Traffic

Avg Daily Traffic3,880 (2011)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000013612

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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