US Bridges

297 Street over Ck

PoorClosed to traffic

Gregory County, South Dakota · 1S & 0.1W Herrick · Structure no. 000000027169280

Built
1920
105 years old
Condition
Poor
inspected May 2017
Type
Culvert
Masonry
Length
40 ft
4 main spans
Daily traffic
10
2022 count
Owner
County
County Highway Agency

About this bridge

297 Street over Ck is a masonry culvert carrying 297 Street over Ck in Gregory County, South Dakota. It was built in 1920, so it is 105 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 poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.

It carries about 10 vehicles a day, roughly 2% of them trucks, projected to reach 10 by 2032. The structure is 40 ft (12.2 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Carries297 Street
CrossesCk
Location1S & 0.1W Herrick
RouteCounty Highway 0
Coordinates43.09675, -99.20007
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionMay 2017
Inspection intervalevery 12 months
Operating statusClosed to all traffic
ScourFoundations stable; scour above top of footing
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating3 US tons
Inventory rating3 US tons

Structure

Structure typeCulvert
MaterialMasonry
DeckNot applicable
Main spans4
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span7 ft (2.1 m)
Deck width24 ft (7.4 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2022)
Projected traffic10 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 statusEligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$15,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 297 Street over Ck built?

It was built in 1920, making it 105 years old in 2025.

What condition is 297 Street over Ck in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2017.

How much traffic does 297 Street over Ck carry?

About 10 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 297 Street over Ck?

The structure is 40 ft (12.2 m) long with a longest span of 7 ft (2.1 m) and a deck 24 ft wide.

Who owns 297 Street over Ck?

It is owned by the County Highway Agency.