Structure 8263 · Oakland County, MI

Kennett Road over Cn & Gtw Rr

Carries Kennett Road over Cn & Gtw Rr, 1/4 Mi SE Telegr & Oaklnd.

Overall conditionFair

Set by its lowest-rated component: Superstructure and Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT50 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

50 ft end to end. 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 or the layout of the shorter spans, so those are drawn as typical for a box-beam bridge.

Built200422 years old
Length49.9 ft15.2 m
Daily traffic6,640counted 2023
Last inspectedOctober 2024every 24 months

Location

StateMichigan
CountyOakland
Location1/4 Mi SE Telegr & Oaklnd
CarriesKennett Road
CrossesCn & Gtw Rr
Coordinates42.66509, -83.32144

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length49.9 ft (15.2 m)
Max Span45.9 ft (14 m)
Deck Width58.4 ft (17.8 m)
Deck Area270.6 sq m
Main Spans1
Year Built2004

Traffic

Avg Daily Traffic6,640 (2023)
Truck Traffic5%
Lanes On Bridge3

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000008263

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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