US Bridges

423 Ave over Redstone Ck

Good

Miner County, South Dakota · 2W & 0.6S Carthage · Structure no. 000000049050026

Built
2011
14 years old
Condition
Good
inspected August 2024
Type
Tee Beam
Prestressed Concrete
Length
77 ft
1 main span
Daily traffic
52
2022 count
Owner
County
County Highway Agency

About this bridge

423 Ave over Redstone Ck is a prestressed concrete tee beam carrying 423 Ave over Redstone Ck in Miner County, South Dakota. It was built in 2011, so it is 14 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 52 vehicles a day, roughly 2% of them trucks, projected to reach 52 by 2032. The structure is 77 ft (23.5 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Carries423 Ave
CrossesRedstone Ck
Location2W & 0.6S Carthage
RouteCounty Highway 0
Coordinates44.16058, -97.75028
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 protection9 ExcellentNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.1 US tons
Inventory rating30.2 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length77 ft (23.5 m)
Longest span73 ft (22.3 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic52 (2022)
Projected traffic52 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 423 Ave over Redstone Ck built?

It was built in 2011, making it 14 years old in 2025.

What condition is 423 Ave over Redstone 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 August 2024.

How much traffic does 423 Ave over Redstone Ck carry?

About 52 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 423 Ave over Redstone Ck?

The structure is 77 ft (23.5 m) long with a longest span of 73 ft (22.3 m) and a deck 32 ft wide.

Who owns 423 Ave over Redstone Ck?

It is owned by the County Highway Agency.