US Bridges

247 ST over Ck

Fair

Aurora County, South Dakota · 4.8N 4.3E White Lake · Structure no. 000000002090092

Built
1936
89 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete
Length
27 ft
3 main spans
Daily traffic
60
2022 count
Owner
County
County Highway Agency

About this bridge

247 ST over Ck is a concrete culvert carrying 247 ST over Ck in Aurora County, South Dakota. It was built in 1936, so it is 89 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 60 vehicles a day, roughly 3% of them trucks, projected to reach 60 by 2032. The structure is 27 ft (8.2 m) long and 31 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Carries247 ST
CrossesCk
Location4.8N 4.3E White Lake
RouteCounty Highway 0
Coordinates43.80176, -98.6223
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 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 geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span8 ft (2.4 m)
Deck width31 ft (9.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2022)
Projected traffic60 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 247 ST over Ck built?

It was built in 1936, making it 89 years old in 2025.

What condition is 247 ST 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 August 2023.

How much traffic does 247 ST over Ck carry?

About 60 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 247 ST over Ck?

The structure is 27 ft (8.2 m) long with a longest span of 8 ft (2.4 m) and a deck 31 ft wide.

Who owns 247 ST over Ck?

It is owned by the County Highway Agency.