US Bridges

SD046 over Ck

Fair

Union County, South Dakota · 11.9 E of Beresford · Structure no. 000000064135000

Built
1954
71 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
1,745
2024 count
Owner
State
State Highway Agency

About this bridge

SD046 over Ck is a concrete continuous culvert carrying SD046 over Ck in Union 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 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 1,745 vehicles a day, roughly 22% of them trucks, projected to reach 2,687 by 2044. The structure is 23 ft (7.1 m) long. If it were closed, the detour would be 26.1 mi (42 km).

CarriesSD046
CrossesCk
Location11.9 E of Beresford
RouteState Highway 46
Coordinates43.08374, -96.53968
Functional classRural Minor Arterial

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 48 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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating101.3 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 15
Structure length23 ft (7.1 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,745 (2024)
Projected traffic2,687 by 2044
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.1 mi (42 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$12,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SD046 over Ck built?

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

What condition is SD046 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 SD046 over Ck carry?

About 1,745 vehicles per day (2024 count), of which roughly 22% are trucks.

How long is SD046 over Ck?

The structure is 23 ft (7.1 m) long with a longest span of 11 ft (3.4 m).

Who owns SD046 over Ck?

It is owned by the State Highway Agency.