Structure 7577 · Muskegon County, MI

Us-31br over White River

Carries Us-31br over White River, 4.2 Mi S Of Oceana Col.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 3 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating3/9 · Serious
Substructure4/9 · Poor
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT90 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 3/9 · sets the ratingSubstructure 4/9

90 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.

Built198640 years old
Length89.9 ft27.4 m
Daily traffic8,531counted 2007
Last inspectedJuly 2024every 12 months

Location

StateMichigan
CountyMuskegon
Location4.2 Mi S Of Oceana Col
CarriesUs-31br
CrossesWhite River
Coordinates43.41353, -86.35202

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length89.9 ft (27.4 m)
Max Span89.9 ft (27.4 m)
Deck Width62.0 ft (18.9 m)
Deck Area517.9 sq m
Main Spans1
Year Built1986

Traffic

Avg Daily Traffic8,531 (2007)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000007577

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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