Structure 52375262 · Pennington County, SD

Sd231 over High Ck

Carries Sd231 over High Ck, 0.2 S Meade Co Line.

Overall conditionFair

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

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

Elevation

Side view, colored by inspection rating
CAR · 15 FT38 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 6/9

A culvert 38 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.

Built1947rebuilt 1999
Length37.7 ft11.5 m
Daily traffic9,071counted 2024
Last inspectedOctober 2024every 24 months

Location

StateSouth Dakota
CountyPennington
Location0.2 S Meade Co Line
CarriesSd231
CrossesHigh Ck
Coordinates44.13754, -103.30252

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length37.7 ft (11.5 m)
Max Span12.1 ft (3.7 m)
Deck Area161 sq m
Main Spans3
Year Built1947 (reconstructed 1999)

Traffic

Avg Daily Traffic9,071 (2024)
Truck Traffic3%
Lanes On Bridge3

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000052375262

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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