Structure 2201 · Dickinson County, MI

County HWY 569 over Sturgeon River

Carries County HWY 569 over Sturgeon River, 4 Mi S Of Foster City.

Overall conditionGood

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

How ratings work
Culvertsets the rating9/9 · Excellent
Channelnot part of overall9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT97 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 9/9

A culvert 97 ft across with 2 openings. 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, so those are drawn as typical for a culvert.

Built20242 years old
Length97.1 ft29.6 m
Daily traffic317counted 2023
Last inspectedJanuary 2025every 24 months

Location

StateMichigan
CountyDickinson
Location4 Mi S Of Foster City
CarriesCounty HWY 569
CrossesSturgeon River
Coordinates45.90961, -87.75699

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length97.1 ft (29.6 m)
Max Span46.9 ft (14.3 m)
Deck Area307.8 sq m
Main Spans2
Year Built2024

Traffic

Avg Daily Traffic317 (2023)
Truck Traffic26%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2025
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number000000000002201

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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