US Bridges

SD079 over Ck

Fair

Butte County, South Dakota · 8.9 NE JCT Sd 168 · Structure no. 000000010341100

Built
1983
42 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
366
2024 count
Owner
State
State Highway Agency

About this bridge

SD079 over Ck is a concrete continuous culvert carrying SD079 over Ck in Butte County, South Dakota. It was built in 1983, so it is 42 years old, younger 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 366 vehicles a day, roughly 18% of them trucks, projected to reach 525 by 2044. The structure is 22 ft (6.8 m) long. If it were closed, the detour would be 24.9 mi (40 km).

CarriesSD079
CrossesCk
Location8.9 NE JCT Sd 168
RouteState Highway 79
Coordinates45.06826, -103.36461
Functional classRural Major Collector

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.
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 rating110.1 US tons
Inventory rating105.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length22 ft (6.8 m)
Longest span10 ft (3.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic366 (2024)
Projected traffic525 by 2044
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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 SD079 over Ck built?

It was built in 1983, making it 42 years old in 2025.

What condition is SD079 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 SD079 over Ck carry?

About 366 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is SD079 over Ck?

The structure is 22 ft (6.8 m) long with a longest span of 10 ft (3.1 m).

Who owns SD079 over Ck?

It is owned by the State Highway Agency.