Structure 6783 · Mecosta County, MI

Marion AVE over Chippewa River

Carries Marion AVE over Chippewa River, 0.4 E Of M-66.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT90 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 5/9 · sets the ratingSubstructure 7/9

90 ft end to end, longest span 30 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 tee-beam bridge.

Built198937 years old
Length89.9 ft27.4 m
Daily traffic450counted 2014
Last inspectedJune 2024every 24 months

Location

StateMichigan
CountyMecosta
Location0.4 E Of M-66
CarriesMarion AVE
CrossesChippewa River
Coordinates43.74870, -85.13916

Physical Characteristics

MaterialPrestressed Concrete
DesignTee Beam
Total Length89.9 ft (27.4 m)
Max Span29.9 ft (9.1 m)
Deck Width30.2 ft (9.2 m)
Deck Area252.1 sq m
Main Spans3
Year Built1989

Traffic

Avg Daily Traffic450 (2014)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000000006783

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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