Structure 8896 · Ottawa County, MI

40th AVE over Kampen Struik Drain

Carries 40th AVE over Kampen Struik Drain, Section 30 Jamestown Twp.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT60 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 8/9

60 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.

Built199828 years old
Length60.0 ft18.3 m
Daily traffic1,190counted 2020
Last inspectedOctober 2024every 24 months

Location

StateMichigan
CountyOttawa
LocationSection 30 Jamestown Twp
Carries40th AVE
CrossesKampen Struik Drain
Coordinates42.78580, -85.88109

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length60.0 ft (18.3 m)
Max Span58.7 ft (17.9 m)
Deck Width37.4 ft (11.4 m)
Deck Area208.6 sq m
Main Spans1
Year Built1998

Traffic

Avg Daily Traffic1,190 (2020)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000000008896

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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