Structure 10559 · Tuscola County, MI

Hoppe Road over State & Colling I/c Drn

Carries Hoppe Road over State & Colling I/c Drn, Sec 15-22 Columbia Twp.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT36 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

36 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.

Built197254 years old
Length35.8 ft10.9 m
Daily traffic260counted 2009
Last inspectedMay 2024every 12 months

Location

StateMichigan
CountyTuscola
LocationSec 15-22 Columbia Twp
CarriesHoppe Road
CrossesState & Colling I/c Drn
Coordinates43.62574, -83.39464

Physical Characteristics

MaterialPrestressed Concrete
DesignTee Beam
Total Length35.8 ft (10.9 m)
Max Span33.5 ft (10.2 m)
Deck Width32.5 ft (9.9 m)
Deck Area107.9 sq m
Main Spans1
Year Built1972

Traffic

Avg Daily Traffic260 (2009)
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number000000000010559

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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