US Bridges

29920 464 Ave. over Ash Ck

Fair

Clay County, South Dakota · 2 E & 4 S Centerville · Structure no. 000000014120022

Built
2001
24 years old
Condition
Fair
inspected September 2024
Type
Tee Beam
Prestressed Concrete
Length
76 ft
1 main span
Daily traffic
97
2022 count
Owner
County
County Highway Agency

About this bridge

29920 464 Ave. over Ash Ck is a prestressed concrete tee beam carrying 29920 464 Ave. over Ash Ck in Clay County, South Dakota. It was built in 2001, so it is 24 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 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 97 vehicles a day, roughly 2% of them trucks, projected to reach 97 by 2032. The structure is 76 ft (23.2 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Carries29920 464 Ave.
CrossesAsh Ck
Location2 E & 4 S Centerville
RouteCounty Highway 0
Coordinates43.05353, -96.92401
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length76 ft (23.2 m)
Longest span72 ft (21.9 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic97 (2022)
Projected traffic97 by 2032
Trucks2%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$25,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 29920 464 Ave. over Ash Ck built?

It was built in 2001, making it 24 years old in 2025.

What condition is 29920 464 Ave. over Ash 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 29920 464 Ave. over Ash Ck carry?

About 97 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 29920 464 Ave. over Ash Ck?

The structure is 76 ft (23.2 m) long with a longest span of 72 ft (21.9 m) and a deck 32 ft wide.

Who owns 29920 464 Ave. over Ash Ck?

It is owned by the County Highway Agency.