US Bridges

47690 310th ST over Ck

Good

Union County, South Dakota · 8.5S & 2.1W Alcester · Structure no. 000000064069130

Built
2020
5 years old
Condition
Good
inspected August 2024
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
30
2022 count
Owner
County
County Highway Agency

About this bridge

47690 310th ST over Ck is a concrete continuous culvert carrying 47690 310th ST over Ck in Union County, South Dakota. It was built in 2020, so it is 5 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 30 vehicles a day, roughly 2% of them trucks, projected to reach 30 by 2032. The structure is 21 ft (6.5 m) long and 20 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Carries47690 310th ST
CrossesCk
Location8.5S & 2.1W Alcester
RouteCounty Highway 0
Coordinates42.8947, -96.66747
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.9 US tons
Inventory rating52.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHL 93
Structure length21 ft (6.5 m)
Longest span10 ft (3.2 m)
Deck width20 ft (6.1 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2022)
Projected traffic30 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 47690 310th ST over Ck built?

It was built in 2020, making it 5 years old in 2025.

What condition is 47690 310th ST over Ck in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.

How much traffic does 47690 310th ST over Ck carry?

About 30 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 47690 310th ST over Ck?

The structure is 21 ft (6.5 m) long with a longest span of 10 ft (3.2 m) and a deck 20 ft wide.

Who owns 47690 310th ST over Ck?

It is owned by the County Highway Agency.