US Bridges

SD015 over Br Whetstone Rv

Fair

Grant County, South Dakota · 3.6 N JCT US 12 · Structure no. 000000026290038

Built
1957
68 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete Continuous
Length
129 ft
5 main spans
Daily traffic
1,321
2024 count
Owner
State
State Highway Agency

About this bridge

SD015 over Br Whetstone Rv is a concrete continuous slab carrying SD015 over Br Whetstone Rv in Grant County, South Dakota. It was built in 1957, so it is 68 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.

It carries about 1,321 vehicles a day, roughly 7% of them trucks, projected to reach 1,804 by 2044. The structure is 129 ft (39.2 m) long and 34 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesSD015
CrossesBr Whetstone Rv
Location3.6 N JCT US 12
RouteState Highway 15
CountyGrant County
StateSouth Dakota
Coordinates45.27162, -96.6373
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 alignment8: Equal to present desirable criteria
Operating rating57.3 US tons
Inventory rating34.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length129 ft (39.2 m)
Longest span26 ft (7.9 m)
Deck width34 ft (10.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,321 (2024)
Projected traffic1,804 by 2044
Trucks7%
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

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 SD015 over Br Whetstone Rv built?

It was built in 1957, making it 68 years old in 2025.

What condition is SD015 over Br 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 November 2024.

How much traffic does SD015 over Br Whetstone Rv carry?

About 1,321 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is SD015 over Br Whetstone Rv?

The structure is 129 ft (39.2 m) long with a longest span of 26 ft (7.9 m) and a deck 34 ft wide.

Who owns SD015 over Br Whetstone Rv?

It is owned by the State Highway Agency.