US Bridges

US012 over Ck

Fair

Brown County, South Dakota · 2.5 E JCT Sd 37 · Structure no. 000000007319342

Built
1972
53 years old, rebuilt 2002
Condition
Fair
inspected June 2024
Type
Culvert
Concrete Continuous
Length
31 ft
3 main spans
Daily traffic
3,468
2023 count
Owner
State
State Highway Agency

About this bridge

US012 over Ck is a concrete continuous culvert carrying US012 over Ck in Brown County, South Dakota. It was built in 1972 and reconstructed in 2002, so it is 53 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 3,468 vehicles a day, roughly 23% of them trucks, projected to reach 4,522 by 2043. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 32.9 mi (53 km).

CarriesUS012
CrossesCk
Location2.5 E JCT Sd 37
RouteU.S. Route 12
Coordinates45.4383, -98.06241
Functional classRural Principal Arterial - Other

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.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating90.9 US tons
Inventory rating54.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,468 (2023)
Projected traffic4,522 by 2043
Trucks23%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed32.9 mi (53 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 1972, making it 53 years old in 2025. It was reconstructed in 2002.

What condition is US012 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 June 2024.

How much traffic does US012 over Ck carry?

About 3,468 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is US012 over Ck?

The structure is 31 ft (9.4 m) long with a longest span of 10 ft (3 m).

Who owns US012 over Ck?

It is owned by the State Highway Agency.