US Bridges

238 ST over Rock Ck

Good

Miner County, South Dakota · 5S & 6.6W Howard · Structure no. 000000049094180

Built
2022
3 years old
Condition
Good
inspected August 2024
Type
Culvert
Concrete Continuous
Length
46 ft
4 main spans
Daily traffic
90
2022 count
Owner
County
County Highway Agency

About this bridge

238 ST over Rock Ck is a concrete continuous culvert carrying 238 ST over Rock Ck in Miner County, South Dakota. It was built in 2022, so it is 3 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 90 vehicles a day, roughly 2% of them trucks, projected to reach 90 by 2032. The structure is 46 ft (13.9 m) long and 24 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Carries238 ST
CrossesRock Ck
Location5S & 6.6W Howard
RouteCounty Highway 0
Coordinates43.93638, -97.66087
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.5 US tons
Inventory rating31.2 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans4
Design loadHL 93
Structure length46 ft (13.9 m)
Longest span11 ft (3.4 m)
Deck width24 ft (7.3 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90 (2022)
Projected traffic90 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 238 ST over Rock Ck built?

It was built in 2022, making it 3 years old in 2025.

What condition is 238 ST over Rock 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 238 ST over Rock Ck carry?

About 90 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 238 ST over Rock Ck?

The structure is 46 ft (13.9 m) long with a longest span of 11 ft (3.4 m) and a deck 24 ft wide.

Who owns 238 ST over Rock Ck?

It is owned by the County Highway Agency.