Structure 58020302 · Spink County, SD

Sd026 over Cottonwood Lake Outlet

Carries Sd026 over Cottonwood Lake Outlet, 4.3 NE Hand 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 FT42 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 6/9

A culvert 42 ft across with 4 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.

Built198937 years old
Length41.7 ft12.7 m
Daily traffic558counted 2024
Last inspectedApril 2024every 48 months

Location

StateSouth Dakota
CountySpink
Location4.3 NE Hand Co Line
CarriesSd026
CrossesCottonwood Lake Outlet
Coordinates44.80595, -98.66973

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length41.7 ft (12.7 m)
Max Span9.8 ft (3 m)
Deck Area124.5 sq m
Main Spans4
Year Built1989

Traffic

Avg Daily Traffic558 (2024)
Truck Traffic18%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000058020302

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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