US Bridges

US012 over Ck

Good

Walworth County, South Dakota · 0.4 S JCT Sd 130 E · Structure no. 000000065210066

Built
1969
56 years old
Condition
Good
inspected March 2023
Type
Culvert
Concrete Continuous
Length
25 ft
3 main spans
Daily traffic
2,111
2024 count
Owner
State
State Highway Agency

About this bridge

US012 over Ck is a concrete continuous culvert carrying US012 over Ck in Walworth County, South Dakota. It was built in 1969, so it is 56 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,111 vehicles a day, roughly 26% of them trucks, projected to reach 3,333 by 2044. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 80.2 mi (129 km).

CarriesUS012
CrossesCk
Location0.4 S JCT Sd 130 E
RouteU.S. Route 12
Coordinates45.49961, -100.03818
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,111 (2024)
Projected traffic3,333 by 2044
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed80.2 mi (129 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US012 over Ck built?

It was built in 1969, making it 56 years old in 2025.

What condition is US012 over Ck in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does US012 over Ck carry?

About 2,111 vehicles per day (2024 count), of which roughly 26% are trucks.

How long is US012 over Ck?

The structure is 25 ft (7.6 m) long with a longest span of 8 ft (2.4 m).

Who owns US012 over Ck?

It is owned by the State Highway Agency.