Structure 5099170 · Bon Homme County, SD

41099 308th Street over Emanuel Creek

Carries 41099 308th Street over Emanuel Creek, 1n & 4.1w Hwys 52 & 37.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 1 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating1/9 · Imminent Failure
Channelnot part of overall1/9 · Imminent Failure
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT80 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 7/9Substructure 1/9 · sets the rating

80 ft end to end, longest span 40 ft. 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
Length80.1 ft24.4 m
Daily traffic60counted 2022
Last inspectedMay 2023every 24 months

Location

StateSouth Dakota
CountyBon Homme
Location1n & 4.1w Hwys 52 & 37
Carries41099 308th Street
CrossesEmanuel Creek
Coordinates42.92323, -97.97213

Physical Characteristics

MaterialPrestressed Concrete
DesignTee Beam
Total Length80.1 ft (24.4 m)
Max Span40.0 ft (12.2 m)
Deck Width24.3 ft (7.4 m)
Deck Area180.6 sq m
Main Spans2
Year Built1983

Traffic

Avg Daily Traffic60 (2022)
Truck Traffic2%
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 CriticalUnknown
Structure Number000000005099170

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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