US Bridges

476 Avenue over Ck

Fair

Grant County, South Dakota · 4E & 0.5N Strandburg · Structure no. 000000026270185

Built
1931
94 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
137
2022 count
Owner
County
County Highway Agency

About this bridge

476 Avenue over Ck is a concrete continuous culvert carrying 476 Avenue over Ck in Grant County, South Dakota. It was built in 1931, so it is 94 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 137 vehicles a day, roughly 2% of them trucks, projected to reach 137 by 2032. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Carries476 Avenue
CrossesCk
Location4E & 0.5N Strandburg
RouteCounty Highway 0
Coordinates45.05783, -96.67987
Functional classRural Local

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 inspectionSeptember 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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length21 ft (6.4 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 traffic137 (2022)
Projected traffic137 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 476 Avenue over Ck built?

It was built in 1931, making it 94 years old in 2025.

What condition is 476 Avenue 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 476 Avenue over Ck carry?

About 137 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 476 Avenue over Ck?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns 476 Avenue over Ck?

It is owned by the County Highway Agency.