Structure 28160269 · Haakon County, SD

Sd073 over West Plum Ck

Carries Sd073 over West Plum Ck, 2.8 S Jct Sd 34.

Overall conditionFair

Set by its lowest-rated component: Culvert at 5 of 9.

How ratings work
Culvertsets the rating5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT25 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 5/9

A culvert 25 ft across with 2 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.

Built199036 years old
Length25.3 ft7.7 m
Daily traffic700counted 2024
Last inspectedJune 2023every 48 months

Location

StateSouth Dakota
CountyHaakon
Location2.8 S Jct Sd 34
CarriesSd073
CrossesWest Plum Ck
Coordinates44.35970, -101.67884

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length25.3 ft (7.7 m)
Max Span12.1 ft (3.7 m)
Deck Area84.7 sq m
Main Spans2
Year Built1990

Traffic

Avg Daily Traffic700 (2024)
Truck Traffic35%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000028160269

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.