Structure 40150239 · Lake County, SD

Sd019 over Trib To Buffalo Lake

Carries Sd019 over Trib To Buffalo Lake, 0.1 N Minnehaha Co Line.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT48 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 48 ft across with 3 openings. 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.

Built201412 years old
Length48.2 ft14.7 m
Daily traffic1,648counted 2024
Last inspectedAugust 2023every 48 months

Location

StateSouth Dakota
CountyLake
Location0.1 N Minnehaha Co Line
CarriesSd019
CrossesTrib To Buffalo Lake
Coordinates43.84930, -97.06954

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length48.2 ft (14.7 m)
Max Span15.4 ft (4.7 m)
Deck Area179.3 sq m
Main Spans3
Year Built2014

Traffic

Avg Daily Traffic1,648 (2024)
Truck Traffic13%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000040150239

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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