US Bridges

257th Street over Skunk Ck

Fair

Minnehaha County, South Dakota · 2N & 1.3E Hartford · Structure no. 000000050103130

Built
1987
38 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete Continuous
Length
223 ft
5 main spans
Daily traffic
48
2023 count
Owner
County
County Highway Agency

About this bridge

257th Street over Skunk Ck is a concrete continuous slab carrying 257th Street over Skunk Ck in Minnehaha County, South Dakota. It was built in 1987, so it is 38 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 48 vehicles a day, roughly 2% of them trucks, projected to reach 55 by 2038. The structure is 223 ft (67.9 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries257th Street
CrossesSkunk Ck
Location2N & 1.3E Hartford
RouteCounty Highway 0
Coordinates43.65982, -96.92424
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66.5 US tons
Inventory rating39.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length223 ft (67.9 m)
Longest span50 ft (15.2 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48 (2023)
Projected traffic55 by 2038
Trucks2%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.7 million (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 257th Street over Skunk Ck built?

It was built in 1987, making it 38 years old in 2025.

What condition is 257th Street over Skunk Ck in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.

How much traffic does 257th Street over Skunk Ck carry?

About 48 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is 257th Street over Skunk Ck?

The structure is 223 ft (67.9 m) long with a longest span of 50 ft (15.2 m) and a deck 34 ft wide.

Who owns 257th Street over Skunk Ck?

It is owned by the County Highway Agency.