Structure 5636 · Lenawee County, MI

Sand Creek HWY over Nile Drain

Carries Sand Creek HWY over Nile Drain, 0.2 Mi S Of Mulberry RD.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT29 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

29 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 slab bridge.

Built1969rebuilt 1992
Length28.9 ft8.8 m
Daily traffic180counted 2010
Last inspectedSeptember 2024every 12 months

Location

StateMichigan
CountyLenawee
Location0.2 Mi S Of Mulberry RD
CarriesSand Creek HWY
CrossesNile Drain
Coordinates41.74052, -84.09665

Physical Characteristics

MaterialWood or Timber
DesignSlab
Total Length28.9 ft (8.8 m)
Max Span27.9 ft (8.5 m)
Deck Width31.2 ft (9.5 m)
Deck Area83.6 sq m
Main Spans1
Year Built1969 (reconstructed 1992)

Traffic

Avg Daily Traffic180 (2010)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number000000000005636

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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