US Bridges

Upper Redwater RD over Redwater Rv

Fair

Lawrence County, South Dakota · 6 W & 4 N Spearfish · Structure no. 000000041025020

Built
1981
44 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Prestressed Concrete
Length
80 ft
3 main spans
Daily traffic
150
2022 count
Owner
County
County Highway Agency

About this bridge

Upper Redwater RD over Redwater Rv is a prestressed concrete tee beam carrying Upper Redwater RD over Redwater Rv in Lawrence County, South Dakota. It was built in 1981, so it is 44 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 fair condition with a lowest component rating of 6 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 150 vehicles a day, roughly 2% of them trucks, projected to reach 150 by 2032. The structure is 80 ft (24.4 m) long and 31 ft wide.

CarriesUpper Redwater RD
CrossesRedwater Rv
Location6 W & 4 N Spearfish
RouteCounty Highway 0
Coordinates44.5758, -104.00014
Functional classRural Local

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 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 geometry6: Equal to 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 spans3
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span40 ft (12.2 m)
Deck width31 ft (9.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2022)
Projected traffic150 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Upper Redwater RD over Redwater Rv built?

It was built in 1981, making it 44 years old in 2025.

What condition is Upper Redwater RD over Redwater 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 Upper Redwater RD over Redwater Rv carry?

About 150 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Upper Redwater RD over Redwater Rv?

The structure is 80 ft (24.4 m) long with a longest span of 40 ft (12.2 m) and a deck 31 ft wide.

Who owns Upper Redwater RD over Redwater Rv?

It is owned by the County Highway Agency.