US Bridges

35320 270 Street over Snake Ck

Good

Charles Mix County, South Dakota · 1.0N 1.8W of Academy · Structure no. 000000012092020

Built
2003
22 years old
Condition
Good
inspected August 2021
Type
Culvert
Concrete Continuous
Length
28 ft
3 main spans
Daily traffic
175
2022 count
Owner
County
County Highway Agency

About this bridge

35320 270 Street over Snake Ck is a concrete continuous culvert carrying 35320 270 Street over Snake Ck in Charles Mix County, South Dakota. It was built in 2003, so it is 22 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 175 vehicles a day, roughly 9% of them trucks, projected to reach 210 by 2032. The structure is 28 ft (8.6 m) long. If it were closed, the detour would be 8.1 mi (13 km).

Carries35320 270 Street
CrossesSnake Ck
Location1.0N 1.8W of Academy
RouteCounty Highway 0
Coordinates43.47094, -99.11896
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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating110.1 US tons
Inventory rating95 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length28 ft (8.6 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175 (2022)
Projected traffic210 by 2032
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 35320 270 Street over Snake Ck built?

It was built in 2003, making it 22 years old in 2025.

What condition is 35320 270 Street over Snake 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 2021.

How much traffic does 35320 270 Street over Snake Ck carry?

About 175 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is 35320 270 Street over Snake Ck?

The structure is 28 ft (8.6 m) long with a longest span of 9 ft (2.7 m).

Who owns 35320 270 Street over Snake Ck?

It is owned by the County Highway Agency.