US Bridges

472nd Avenue over N. Fork Whetstone Rv

FairPosted for load

Roberts County, South Dakota · 2.2N of Corona · Structure no. 000000055230391

Built
1938
87 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
42 ft
1 main span
Daily traffic
195
2022 count
Owner
County
County Highway Agency

About this bridge

472nd Avenue over N. Fork Whetstone Rv is a steel stringer/multi-beam or girder carrying 472nd Avenue over N. Fork Whetstone Rv in Roberts County, South Dakota. It was built in 1938, so it is 87 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 195 vehicles a day, roughly 3% of them trucks, projected to reach 195 by 2032. The structure is 42 ft (12.8 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Carries472nd Avenue
CrossesN. Fork Whetstone Rv
Location2.2N of Corona
RouteCounty Highway 6433
Coordinates45.36926, -96.76005
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.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating29.8 US tons
Inventory rating23 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length42 ft (12.8 m)
Longest span40 ft (12.2 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic195 (2022)
Projected traffic195 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 472nd Avenue over N. Fork Whetstone Rv built?

It was built in 1938, making it 87 years old in 2025.

What condition is 472nd Avenue over N. Fork Whetstone Rv 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 July 2024.

How much traffic does 472nd Avenue over N. Fork Whetstone Rv carry?

About 195 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 472nd Avenue over N. Fork Whetstone Rv?

The structure is 42 ft (12.8 m) long with a longest span of 40 ft (12.2 m) and a deck 27 ft wide.

Who owns 472nd Avenue over N. Fork Whetstone Rv?

It is owned by the County Highway Agency.