US Bridges

227 ST over Rock Ck

Good

Miner County, South Dakota · 4S & 6.3W Howard · Structure no. 000000049097170

Built
2002
23 years old
Condition
Good
inspected August 2024
Type
Culvert
Concrete Continuous
Length
42 ft
4 main spans
Daily traffic
10
2022 count
Owner
County
County Highway Agency

About this bridge

227 ST over Rock Ck is a concrete continuous culvert carrying 227 ST over Rock Ck in Miner County, South Dakota. It was built in 2002, so it is 23 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 10 vehicles a day, roughly 3% of them trucks, projected to reach 10 by 2032. The structure is 42 ft (12.8 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Carries227 ST
CrossesRock Ck
Location4S & 6.3W Howard
RouteCounty Highway 0
Coordinates43.95081, -97.65699
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 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating29.3 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans4
Design loadHS 20 + Mod
Structure length42 ft (12.8 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 traffic10 (2022)
Projected traffic10 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 227 ST over Rock Ck built?

It was built in 2002, making it 23 years old in 2025.

What condition is 227 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 227 ST over Rock Ck carry?

About 10 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 227 ST over Rock Ck?

The structure is 42 ft (12.8 m) long with a longest span of 10 ft (3 m).

Who owns 227 ST over Rock Ck?

It is owned by the County Highway Agency.