US Bridges

US018 over Ck

Fair

Fall River County, South Dakota · 0.7 W JCT US 385 · Structure no. 000000024293039

Built
1968
57 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete Continuous
Length
33 ft
3 main spans
Daily traffic
4,913
2024 count
Owner
State
State Highway Agency

About this bridge

US018 over Ck is a concrete continuous culvert carrying US018 over Ck in Fall River County, South Dakota. It was built in 1968, so it is 57 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 4,913 vehicles a day, roughly 7% of them trucks, projected to reach 7,301 by 2044. The structure is 33 ft (10.1 m) long. If it were closed, the detour would be 75.2 mi (121 km).

CarriesUS018
CrossesCk
Location0.7 W JCT US 385
RouteU.S. Route 18
Coordinates43.42026, -103.4767
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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating83.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span10 ft (3.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,913 (2024)
Projected traffic7,301 by 2044
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed75.2 mi (121 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

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 US018 over Ck built?

It was built in 1968, making it 57 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 April 2024.

How much traffic does US018 over Ck carry?

About 4,913 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is US018 over Ck?

The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3.2 m).

Who owns US018 over Ck?

It is owned by the State Highway Agency.