US Bridges

386 Ave over Ck

Fair

Aurora County, South Dakota · 14.2N Plankinton · Structure no. 000000002160008

Built
1945
80 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
50
2022 count
Owner
County
County Highway Agency

About this bridge

386 Ave over Ck is a concrete culvert carrying 386 Ave over Ck in Aurora County, South Dakota. It was built in 1945, so it is 80 years old, older than the South Dakota average of 48.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 50 vehicles a day, roughly 2% of them trucks, projected to reach 50 by 2032. The structure is 21 ft (6.4 m) long and 27 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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Carries386 Ave
CrossesCk
Location14.2N Plankinton
RouteCounty Highway 0
CountyAurora County
StateSouth Dakota
Coordinates43.92339, -98.49125
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width27 ft (8.2 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic50 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 386 Ave over Ck built?

It was built in 1945, making it 80 years old in 2025.

What condition is 386 Ave over Ck in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2023.

How much traffic does 386 Ave over Ck carry?

About 50 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 386 Ave over Ck?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 27 ft wide.

Who owns 386 Ave over Ck?

It is owned by the County Highway Agency.