US Bridges

White Hill Road over Big Nasty Ck

Good

Perkins County, South Dakota · 3.5W 11.5N Prairie · Structure no. 000000053035175

Built
1991
34 years old
Condition
Good
inspected May 2023
Type
Tee Beam
Prestressed Concrete
Length
90 ft
2 main spans
Daily traffic
33
2022 count
Owner
County
County Highway Agency

About this bridge

White Hill Road over Big Nasty Ck is a prestressed concrete tee beam carrying White Hill Road over Big Nasty Ck in Perkins County, South Dakota. It was built in 1991, so it is 34 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 33 vehicles a day, roughly 3% of them trucks, projected to reach 33 by 2032. The structure is 90 ft (27.4 m) long and 31 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

CarriesWhite Hill Road
CrossesBig Nasty Ck
Location3.5W 11.5N Prairie
RouteCounty Highway 0
Coordinates45.69759, -102.87861
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span45 ft (13.7 m)
Deck width31 ft (9.4 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33 (2022)
Projected traffic33 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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 White Hill Road over Big Nasty Ck built?

It was built in 1991, making it 34 years old in 2025.

What condition is White Hill Road over Big Nasty Ck 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 May 2023.

How much traffic does White Hill Road over Big Nasty Ck carry?

About 33 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is White Hill Road over Big Nasty Ck?

The structure is 90 ft (27.4 m) long with a longest span of 45 ft (13.7 m) and a deck 31 ft wide.

Who owns White Hill Road over Big Nasty Ck?

It is owned by the County Highway Agency.