US Bridges

35400 271st Street over Snake Creek

FairPosted for load

Charles Mix County, South Dakota · 1W of Academy · Structure no. 000000012100030

Built
1963
62 years old
Condition
Fair
inspected September 2023
Type
Channel Beam
Concrete
Length
31 ft
1 main span
Daily traffic
48
2022 count
Owner
County
County Highway Agency

About this bridge

35400 271st Street over Snake Creek is a concrete channel beam carrying 35400 271st Street over Snake Creek in Charles Mix County, South Dakota. It was built in 1963, so it is 62 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 fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 48 vehicles a day, roughly 2% of them trucks, projected to reach 48 by 2032. The structure is 31 ft (9.4 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries35400 271st Street
CrossesSnake Creek
Location1W of Academy
Coordinates43.45644, -99.10336
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27 US tons
Inventory rating20.2 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length31 ft (9.4 m)
Longest span30 ft (9.1 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48 (2022)
Projected traffic48 by 2032
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$539,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 35400 271st Street over Snake Creek built?

It was built in 1963, making it 62 years old in 2025.

What condition is 35400 271st Street over Snake Creek 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 September 2023.

How much traffic does 35400 271st Street over Snake Creek carry?

About 48 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 35400 271st Street over Snake Creek?

The structure is 31 ft (9.4 m) long with a longest span of 30 ft (9.1 m) and a deck 26 ft wide.

Who owns 35400 271st Street over Snake Creek?

It is owned by the County Highway Agency.