US Bridges

US012 over Whetstone Rv

Good

Grant County, South Dakota · 0.6 SW JCT Sd 109 · Structure no. 000000026369027

Built
2003
22 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
153 ft
2 main spans
Daily traffic
3,334
2024 count
Owner
State
State Highway Agency

About this bridge

US012 over Whetstone Rv is a prestressed concrete continuous stringer/multi-beam or girder carrying US012 over Whetstone Rv in Grant 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 3,334 vehicles a day, roughly 16% of them trucks, projected to reach 4,554 by 2044. The structure is 153 ft (46.6 m) long and 43 ft wide. If it were closed, the detour would be 62.1 mi (100 km).

CarriesUS012
CrossesWhetstone Rv
Location0.6 SW JCT Sd 109
RouteU.S. Route 12
Coordinates45.28686, -96.47551
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating105.1 US tons
Inventory rating62.9 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length153 ft (46.6 m)
Longest span73 ft (22.3 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,334 (2024)
Projected traffic4,554 by 2044
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed62.1 mi (100 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US012 over Whetstone Rv built?

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

What condition is US012 over Whetstone Rv 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 November 2024.

How much traffic does US012 over Whetstone Rv carry?

About 3,334 vehicles per day (2024 count), of which roughly 16% are trucks.

How long is US012 over Whetstone Rv?

The structure is 153 ft (46.6 m) long with a longest span of 73 ft (22.3 m) and a deck 43 ft wide.

Who owns US012 over Whetstone Rv?

It is owned by the State Highway Agency.