Structure 13366 · Wayne County, MI

Dingell RD over Perimeter RD

Carries Dingell RD over Perimeter RD, 950 Ft N Of Eureka RD.

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
CAR · 15 FT32 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

32 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.

Built199135 years old
Length32.2 ft9.8 m
Daily traffic17,070counted 2011
Last inspectedMay 2023every 24 months

Location

StateMichigan
CountyWayne
Location950 Ft N Of Eureka RD
CarriesDingell RD
CrossesPerimeter RD
Coordinates42.19489, -83.36348

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length32.2 ft (9.8 m)
Max Span29.9 ft (9.1 m)
Deck Width128.0 ft (39 m)
Deck Area382.2 sq m
Main Spans1
Year Built1991

Traffic

Avg Daily Traffic17,070 (2011)
Lanes On Bridge4
Lanes Under Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerOther Local Agencies
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000013366

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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