350 Ave FAS 6471 over American Ck

Fair

Brule County, South Dakota · 0.2N Pukwana · Structure no. 000000008145098

Built: 1962; 63 years old
Condition: Fair; inspected August 2024
Type: Slab; Concrete Continuous
Length: 74 ft; 3 main spans
Daily traffic: 308; 2022 count
Owner: County; County Highway Agency

About this bridge

350 Ave FAS 6471 over American Ck is a concrete continuous slab carrying 350 Ave FAS 6471 over American Ck in Brule County, South Dakota. It was built in 1962, so it is 63 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 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 308 vehicles a day, roughly 3% of them trucks, projected to reach 308 by 2032. The structure is 74 ft (22.6 m) long and 28 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

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Carries350 Ave FAS 6471

CrossesAmerican Ck

Location0.2N Pukwana

RouteCounty Highway 0

CountyBrule County

StateSouth Dakota

Coordinates43.79079, -99.18333

Functional classRural Major Collector

Condition and inspection

Fair

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

Component	Rating	Meaning
Deck	8 Very Good	No problems noted.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	6 Satisfactory	Structural elements show some minor deterioration.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionAugust 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation6: Equal to present minimum criteria

Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating44.8 US tons

Inventory rating26.7 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHS 20 + Mod

Structure length74 ft (22.6 m)

Longest span28 ft (8.5 m)

Deck width28 ft (8.6 m)

Roadway width24 ft (7.3 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic308 (2022)

Projected traffic308 by 2032

Trucks3%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed13 mi (21 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 proposedRehabilitation because of general structure deterioration or inadequate strength

Estimated improvement cost$45,000

NavigationNo navigation control on waterway

Frequently asked questions

When was 350 Ave FAS 6471 over American Ck built?

It was built in 1962, making it 63 years old in 2025.

What condition is 350 Ave FAS 6471 over American 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 August 2024.

How much traffic does 350 Ave FAS 6471 over American Ck carry?

About 308 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 350 Ave FAS 6471 over American Ck?

The structure is 74 ft (22.6 m) long with a longest span of 28 ft (8.5 m) and a deck 28 ft wide.

Who owns 350 Ave FAS 6471 over American Ck?

It is owned by the County Highway Agency.