US Bridges

472 Avenue over Trib to S Fork Whetstone

Good

Grant County, South Dakota · 1E & 3.2N Twin Brooks · Structure no. 000000026230048

Built
2021
4 years old
Condition
Good
inspected August 2022
Type
Culvert
Concrete
Length
29 ft
2 main spans
Daily traffic
332
2022 count
Owner
County
County Highway Agency

About this bridge

472 Avenue over Trib to S Fork Whetstone is a concrete culvert carrying 472 Avenue over Trib to S Fork Whetstone in Grant County, South Dakota. It was built in 2021, so it is 4 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 332 vehicles a day, roughly 2% of them trucks, projected to reach 332 by 2032. The structure is 29 ft (8.7 m) long. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
Carries472 Avenue
CrossesTrib to S Fork Whetstone
Location1E & 3.2N Twin Brooks
RouteCounty Highway 0
CountyGrant County
StateSouth Dakota
Coordinates45.25555, -96.7604
Functional classRural Major Collector

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 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating51 US tons
Inventory rating40 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length29 ft (8.7 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic332 (2022)
Projected traffic332 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 472 Avenue over Trib to S Fork Whetstone built?

It was built in 2021, making it 4 years old in 2025.

What condition is 472 Avenue over Trib to S Fork Whetstone 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 2022.

How much traffic does 472 Avenue over Trib to S Fork Whetstone carry?

About 332 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 472 Avenue over Trib to S Fork Whetstone?

The structure is 29 ft (8.7 m) long with a longest span of 14 ft (4.3 m).

Who owns 472 Avenue over Trib to S Fork Whetstone?

It is owned by the County Highway Agency.