Structure 7602 · Muskegon County, MI

White Lake Drive over Us-31 NB

Carries White Lake Drive over Us-31 NB, 7.5 Mi NW Of M-120.

Overall conditionPoor

Set by its lowest-rated component: Deck at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructure5/9 · Fair
Substructure5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT141 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 5/9Substructure 5/9

141 ft end to end, longest span 72 ft. Lengths and the semi-truck 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.

Built196462 years old
Length140.7 ft42.9 m
Daily traffic3,898counted 1997
Last inspectedJuly 2024every 12 months

Location

StateMichigan
CountyMuskegon
Location7.5 Mi NW Of M-120
CarriesWhite Lake Drive
CrossesUs-31 NB
Coordinates43.38387, -86.27948

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length140.7 ft (42.9 m)
Max Span71.9 ft (21.9 m)
Deck Width33.1 ft (10.1 m)
Deck Area433.3 sq m
Main Spans3
Year Built1964

Traffic

Avg Daily Traffic3,898 (1997)
Truck Traffic3%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000007602

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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