US Bridges

46530 312 St. over Vermillion Rv

Fair

Clay County, South Dakota · 1.6E & 5.5N Vermillion · Structure no. 000000014133150

Built
1985
40 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
159 ft
5 main spans
Daily traffic
97
2022 count
Owner
County
County Highway Agency

About this bridge

46530 312 St. over Vermillion Rv is a concrete continuous slab carrying 46530 312 St. over Vermillion Rv in Clay County, South Dakota. It was built in 1985, so it is 40 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 97 vehicles a day, roughly 3% of them trucks, projected to reach 97 by 2032. The structure is 159 ft (48.4 m) long and 32 ft wide.

Location

Open in Google Maps
Carries46530 312 St.
CrossesVermillion Rv
Location1.6E & 5.5N Vermillion
RouteCounty Highway 0
CountyClay County
StateSouth Dakota
Coordinates42.86634, -96.89702
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 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 alignment7: Better than present minimum criteria
Operating rating79.7 US tons
Inventory rating47.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length159 ft (48.4 m)
Longest span45 ft (13.7 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic97 (2022)
Projected traffic97 by 2032
Trucks3%
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$25,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 46530 312 St. over Vermillion Rv built?

It was built in 1985, making it 40 years old in 2025.

What condition is 46530 312 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 46530 312 St. over Vermillion Rv carry?

About 97 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 46530 312 St. over Vermillion Rv?

The structure is 159 ft (48.4 m) long with a longest span of 45 ft (13.7 m) and a deck 32 ft wide.

Who owns 46530 312 St. over Vermillion Rv?

It is owned by the County Highway Agency.