US Bridges

296 Street over Ck

Good

Tripp County, South Dakota · 2.5N & 8.2E Millboro · Structure no. 000000062222460

Built
1958
67 years old
Condition
Good
inspected June 2021
Type
Culvert
Concrete Continuous
Length
31 ft
3 main spans
Daily traffic
95
2022 count
Owner
County
County Highway Agency

About this bridge

296 Street over Ck is a concrete continuous culvert carrying 296 Street over Ck in Tripp County, South Dakota. It was built in 1958, so it is 67 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 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 95 vehicles a day, roughly 3% of them trucks, projected to reach 95 by 2032. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Carries296 Street
CrossesCk
Location2.5N & 8.2E Millboro
RouteCounty Highway 0
Coordinates43.11117, -99.8066
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJune 2021
Inspection intervalevery 48 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 alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 15
Structure length31 ft (9.4 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 traffic95 (2022)
Projected traffic95 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 296 Street over Ck built?

It was built in 1958, making it 67 years old in 2025.

What condition is 296 Street 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 June 2021.

How much traffic does 296 Street over Ck carry?

About 95 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 296 Street over Ck?

The structure is 31 ft (9.4 m) long with a longest span of 10 ft (3 m).

Who owns 296 Street over Ck?

It is owned by the County Highway Agency.