Structure 7606 · Muskegon County, MI

Us-31 NB over Walsh RD

Carries Us-31 NB over Walsh RD, 0.6 Mi S Of N Jct Us-31br.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT111 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 6/9

111 ft end to end, longest span 41 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.

Built196561 years old
Length110.9 ft33.8 m
Daily traffic8,086counted 2007
Last inspectedJuly 2023every 24 months

Location

StateMichigan
CountyMuskegon
Location0.6 Mi S Of N Jct Us-31br
CarriesUs-31 NB
CrossesWalsh RD
Coordinates43.43417, -86.33603

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length110.9 ft (33.8 m)
Max Span41.0 ft (12.5 m)
Deck Width42.7 ft (13 m)
Deck Area439.4 sq m
Main Spans3
Year Built1965

Traffic

Avg Daily Traffic8,086 (2007)
Truck Traffic7%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000007606

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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