US Bridges

231 Avenue over Lake Ck

Fair

Bennett County, South Dakota · 0.5 S Tuthill · Structure no. 000000004310165

Built
1954
71 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete Continuous
Length
54 ft
3 main spans
Daily traffic
120
2022 count
Owner
County
County Highway Agency

About this bridge

231 Avenue over Lake Ck is a concrete continuous slab carrying 231 Avenue over Lake Ck in Bennett County, South Dakota. It was built in 1954, so it is 71 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 6 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 120 vehicles a day, roughly 3% of them trucks, projected to reach 120 by 2032. The structure is 54 ft (16.5 m) long and 28 ft wide. If it were closed, the detour would be 34.2 mi (55 km).

Carries231 Avenue
CrossesLake Ck
Location0.5 S Tuthill
RouteCounty Highway 0
Coordinates43.14986, -101.49436
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.9 US tons
Inventory rating22 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length54 ft (16.5 m)
Longest span20 ft (6.1 m)
Deck width28 ft (8.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2022)
Projected traffic120 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.2 mi (55 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 231 Avenue over Lake Ck built?

It was built in 1954, making it 71 years old in 2025.

What condition is 231 Avenue over Lake 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 2024.

How much traffic does 231 Avenue over Lake Ck carry?

About 120 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 231 Avenue over Lake Ck?

The structure is 54 ft (16.5 m) long with a longest span of 20 ft (6.1 m) and a deck 28 ft wide.

Who owns 231 Avenue over Lake Ck?

It is owned by the County Highway Agency.