Structure 6433 · Macomb County, MI

Auburn RD over Clinton River

Carries Auburn RD over Clinton River, West Of Van Dyke.

Overall conditionFair

Set by its lowest-rated component: Deck at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructure6/9 · Satisfactory
Channelnot part of overall4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT101 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 6/9

101 ft end to end, longest span 51 ft. 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 multi-beam bridge.

Built1928rebuilt 1988
Length101.4 ft30.9 m
Daily traffic11,186counted 2008
Last inspectedSeptember 2024every 24 months

Location

StateMichigan
CountyMacomb
LocationWest Of Van Dyke
CarriesAuburn RD
CrossesClinton River
Coordinates42.62582, -83.03760

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length101.4 ft (30.9 m)
Max Span50.9 ft (15.5 m)
Deck Width41.0 ft (12.5 m)
Deck Area386.2 sq m
Main Spans2
Year Built1928 (reconstructed 1988)

Traffic

Avg Daily Traffic11,186 (2008)
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number000000000006433

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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