US Bridges

C Hy 6/STAMFORD RD over White Rv

Good

Mellette County, South Dakota · 18.9N & 0.8W Cedar Butte · Structure no. 000000048102010

Built
2017
8 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
322 ft
3 main spans
Daily traffic
85
2022 count
Owner
County
County Highway Agency

About this bridge

C Hy 6/STAMFORD RD over White Rv is a prestressed concrete stringer/multi-beam or girder carrying C Hy 6/STAMFORD RD over White Rv in Mellette County, South Dakota. It was built in 2017, so it is 8 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 85 vehicles a day, roughly 11% of them trucks, projected to reach 115 by 2037. The structure is 322 ft (98.1 m) long and 31 ft wide. If it were closed, the detour would be 55.3 mi (89 km).

CarriesC Hy 6/STAMFORD RD
CrossesWhite Rv
Location18.9N & 0.8W Cedar Butte
RouteCounty Highway 0
Coordinates43.85119, -101.03948
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating60.5 US tons
Inventory rating46.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length322 ft (98.1 m)
Longest span109 ft (33.2 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic85 (2022)
Projected traffic115 by 2037
Trucks11%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed55.3 mi (89 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 C Hy 6/STAMFORD RD over White Rv built?

It was built in 2017, making it 8 years old in 2025.

What condition is C Hy 6/STAMFORD RD over White 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 July 2024.

How much traffic does C Hy 6/STAMFORD RD over White Rv carry?

About 85 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is C Hy 6/STAMFORD RD over White Rv?

The structure is 322 ft (98.1 m) long with a longest span of 109 ft (33.2 m) and a deck 31 ft wide.

Who owns C Hy 6/STAMFORD RD over White Rv?

It is owned by the County Highway Agency.