US Bridges

240 ST over East Fork Vermillion Rv

Fair

Lake County, South Dakota · 7.0S & 1.1W Junius · Structure no. 000000040049200

Built
1977
48 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
45 ft
1 main span
Daily traffic
45
2022 count
Owner
County
County Highway Agency

About this bridge

240 ST over East Fork Vermillion Rv is a prestressed concrete tee beam carrying 240 ST over East Fork Vermillion Rv in Lake County, South Dakota. It was built in 1977, so it is 48 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 5 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 45 vehicles a day, roughly 2% of them trucks, projected to reach 45 by 2032. The structure is 45 ft (13.7 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries240 ST
CrossesEast Fork Vermillion Rv
Location7.0S & 1.1W Junius
RouteCounty Highway 0
CountyLake County
StateSouth Dakota
Coordinates43.90619, -97.27111
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
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 geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating44 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length45 ft (13.7 m)
Longest span43 ft (13.1 m)
Deck width31 ft (9.4 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2022)
Projected traffic45 by 2032
Trucks2%
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$5,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 240 ST over East Fork Vermillion Rv built?

It was built in 1977, making it 48 years old in 2025.

What condition is 240 ST over East Fork 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 August 2023.

How much traffic does 240 ST over East Fork Vermillion Rv carry?

About 45 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 240 ST over East Fork Vermillion Rv?

The structure is 45 ft (13.7 m) long with a longest span of 43 ft (13.1 m) and a deck 31 ft wide.

Who owns 240 ST over East Fork Vermillion Rv?

It is owned by the County Highway Agency.