Structure 8243 · Oakland County, MI

Mont Eagle Road over Huron River

Carries Mont Eagle Road over Huron River, Southeast Of Huron Bridge.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT38 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

38 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.

Built198937 years old
Length37.7 ft11.5 m
Daily traffic400counted 1990
Last inspectedOctober 2023every 24 months

Location

StateMichigan
CountyOakland
LocationSoutheast Of Huron Bridge
CarriesMont Eagle Road
CrossesHuron River
Coordinates42.58225, -83.59007

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length37.7 ft (11.5 m)
Max Span33.8 ft (10.3 m)
Deck Width24.6 ft (7.5 m)
Deck Area86.2 sq m
Main Spans1
Year Built1989

Traffic

Avg Daily Traffic400 (1990)
Truck Traffic1%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number000000000008243

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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