US Bridges

349 Avenue over South Fork Whetstone Ck

Fair

Gregory County, South Dakota · 2.4S & 1.1E of Lucas · Structure no. 000000027168174

Built
1997
28 years old
Condition
Fair
inspected August 2024
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
36
2022 count
Owner
County
County Highway Agency

About this bridge

349 Avenue over South Fork Whetstone Ck is a concrete continuous culvert carrying 349 Avenue over South Fork Whetstone Ck in Gregory County, South Dakota. It was built in 1997, so it is 28 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 36 vehicles a day, roughly 1% of them trucks, projected to reach 36 by 2032. The structure is 25 ft (7.5 m) long. If it were closed, the detour would be 16.8 mi (27 km).

Carries349 Avenue
CrossesSouth Fork Whetstone Ck
Location2.4S & 1.1E of Lucas
RouteCounty Highway 0
Coordinates43.25041, -99.20199
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.8 US tons
Inventory rating53.2 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length25 ft (7.5 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36 (2022)
Projected traffic36 by 2032
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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 349 Avenue over South Fork Whetstone Ck built?

It was built in 1997, making it 28 years old in 2025.

What condition is 349 Avenue over South Fork Whetstone 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 349 Avenue over South Fork Whetstone Ck carry?

About 36 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is 349 Avenue over South Fork Whetstone Ck?

The structure is 25 ft (7.5 m) long with a longest span of 12 ft (3.7 m).

Who owns 349 Avenue over South Fork Whetstone Ck?

It is owned by the County Highway Agency.