Structure 10567 · Tuscola County, MI

Harmon Lake Road over Sucker Creek Drain

Carries Harmon Lake Road over Sucker Creek Drain, Sec 1-12 Dayton Twp.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT28 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

28 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 tee-beam bridge.

Built198343 years old
Length27.9 ft8.5 m
Daily traffic50counted 2009
Last inspectedApril 2023every 24 months

Location

StateMichigan
CountyTuscola
LocationSec 1-12 Dayton Twp
CarriesHarmon Lake Road
CrossesSucker Creek Drain
Coordinates43.39709, -83.24303

Physical Characteristics

MaterialPrestressed Concrete
DesignTee Beam
Total Length27.9 ft (8.5 m)
Max Span27.2 ft (8.3 m)
Deck Width32.5 ft (9.9 m)
Deck Area84.2 sq m
Main Spans1
Year Built1983

Traffic

Avg Daily Traffic50 (2009)
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number000000000010567

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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