US Bridges

US018 over Ck

Fair

Tripp County, South Dakota · 0.1 W JCT Sd 53 · Structure no. 000000062098270

Built
1965
60 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete Continuous
Length
27 ft
3 main spans
Daily traffic
1,139
2024 count
Owner
State
State Highway Agency

About this bridge

US018 over Ck is a concrete continuous culvert carrying US018 over Ck in Tripp County, South Dakota. It was built in 1965, so it is 60 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 1,139 vehicles a day, roughly 18% of them trucks, projected to reach 1,546 by 2044. The structure is 27 ft (8.1 m) long. If it were closed, the detour would be 29.8 mi (48 km).

CarriesUS018
CrossesCk
Location0.1 W JCT Sd 53
RouteU.S. Route 18
Coordinates43.3864, -100.04861
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 inspectionMarch 2023
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 rating99 US tons
Inventory rating79.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length27 ft (8.1 m)
Longest span9 ft (2.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,139 (2024)
Projected traffic1,546 by 2044
Trucks18%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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$15,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US018 over Ck built?

It was built in 1965, making it 60 years old in 2025.

What condition is US018 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 March 2023.

How much traffic does US018 over Ck carry?

About 1,139 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is US018 over Ck?

The structure is 27 ft (8.1 m) long with a longest span of 9 ft (2.6 m).

Who owns US018 over Ck?

It is owned by the State Highway Agency.