US Bridges

US281 over Ck

Fair

Aurora County, South Dakota · 4.9 N I90 Interchange · Structure no. 000000002180116

Built
1960
65 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete Continuous
Length
20 ft
2 main spans
Daily traffic
1,284
2024 count
Owner
State
State Highway Agency

About this bridge

US281 over Ck is a concrete continuous culvert carrying US281 over Ck in Aurora County, South Dakota. It was built in 1960, so it is 65 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 1,284 vehicles a day, roughly 31% of them trucks, projected to reach 1,907 by 2044. The structure is 20 ft (6.2 m) long. If it were closed, the detour would be 41 mi (66 km).

CarriesUS281
CrossesCk
Location4.9 N I90 Interchange
RouteU.S. Route 281
Coordinates43.76539, -98.44571
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 48 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 rating68.7 US tons
Inventory rating41.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length20 ft (6.2 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 traffic1,284 (2024)
Projected traffic1,907 by 2044
Trucks31%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed41 mi (66 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$20,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US281 over Ck built?

It was built in 1960, making it 65 years old in 2025.

What condition is US281 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 September 2024.

How much traffic does US281 over Ck carry?

About 1,284 vehicles per day (2024 count), of which roughly 31% are trucks.

How long is US281 over Ck?

The structure is 20 ft (6.2 m) long with a longest span of 10 ft (3 m).

Who owns US281 over Ck?

It is owned by the State Highway Agency.