Structure 10227 · St. Clair County, MI

Klettner Road over Moak Drain

Carries Klettner Road over Moak Drain, Sec 10 ST Clair Twp.

Overall conditionGood

Set by its lowest-rated component: Culvert at 8 of 9.

How ratings work
Culvertsets the rating8/9 · Very Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT26 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 8/9

A culvert 26 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.

Built20215 years old
Length26.2 ft8 m
Daily traffic200counted 2021
Last inspectedMay 2023every 24 months

Location

StateMichigan
CountySt. Clair
LocationSec 10 ST Clair Twp
CarriesKlettner Road
CrossesMoak Drain
Coordinates42.87630, -82.54640

Physical Characteristics

MaterialSteel
DesignCulvert
Total Length26.2 ft (8 m)
Max Span14.1 ft (4.3 m)
Deck Area58.4 sq m
Main Spans2
Year Built2021

Traffic

Avg Daily Traffic200 (2021)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000000010227

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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