Structure 2239155 · Aurora County, SD

Old HWY 16 over Ck

Carries Old HWY 16 over Ck, Davison 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 overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT75 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 6/9

A culvert 75 ft across with 5 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.

Built195175 years old
Length74.8 ft22.8 m
Daily traffic495counted 2022
Last inspectedJuly 2021every 48 months

Location

StateSouth Dakota
CountyAurora
LocationDavison Co. Line
CarriesOld HWY 16
CrossesCk
Coordinates43.70976, -98.32572

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length74.8 ft (22.8 m)
Max Span14.1 ft (4.3 m)
Deck Area291.8 sq m
Main Spans5
Year Built1951

Traffic

Avg Daily Traffic495 (2022)
Truck Traffic9%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2021
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000002239155

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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