US Bridges

46320 306 St. over Vermillion Rv

FairPosted for load

Clay County, South Dakota · 1.8W Hub City · Structure no. 000000014112090

Built
1970
55 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
152 ft
5 main spans
Daily traffic
150
2022 count
Owner
County
County Highway Agency

About this bridge

46320 306 St. over Vermillion Rv is a concrete continuous slab carrying 46320 306 St. over Vermillion Rv in Clay County, South Dakota. It was built in 1970, so it is 55 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. Its operating status is: posted for load restriction.

It carries about 150 vehicles a day, roughly 3% of them trucks, projected to reach 150 by 2032. The structure is 152 ft (46.2 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries46320 306 St.
CrossesVermillion Rv
Location1.8W Hub City
RouteCounty Highway 0
CountyClay County
StateSouth Dakota
Coordinates42.95354, -96.94711
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.8 US tons
Inventory rating21.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length152 ft (46.2 m)
Longest span32 ft (9.9 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2022)
Projected traffic150 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$25,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 46320 306 St. over Vermillion Rv built?

It was built in 1970, making it 55 years old in 2025.

What condition is 46320 306 St. over Vermillion 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 September 2024.

How much traffic does 46320 306 St. over Vermillion Rv carry?

About 150 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 46320 306 St. over Vermillion Rv?

The structure is 152 ft (46.2 m) long with a longest span of 32 ft (9.9 m) and a deck 32 ft wide.

Who owns 46320 306 St. over Vermillion Rv?

It is owned by the County Highway Agency.