Structure 7363 · Monroe County, MI

Kelly Road over Muddy Creek

Carries Kelly Road over Muddy Creek, 0.1 Mi W Of Cousino Road.

Overall conditionPoor

Set by its lowest-rated component: Culvert at 3 of 9.

How ratings work
Culvertsets the rating3/9 · Serious
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT31 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 3/9

A culvert 31 ft across. 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.

Built198640 years old
Length30.8 ft9.4 m
Daily traffic280counted 2018
Last inspectedAugust 2024every 12 months

Location

StateMichigan
CountyMonroe
Location0.1 Mi W Of Cousino Road
CarriesKelly Road
CrossesMuddy Creek
Coordinates41.83016, -83.44676

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length30.8 ft (9.4 m)
Max Span27.9 ft (8.5 m)
Deck Area74.3 sq m
Main Spans1
Year Built1986

Traffic

Avg Daily Traffic280 (2018)
Truck Traffic19%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000007363

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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