US Bridges

US081 over Big Sioux Rv

Fair

Codington County, South Dakota · 0.7 S JCT US 212 · Structure no. 000000015190186

Built
1966
59 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
119 ft
3 main spans
Daily traffic
7,665
2024 count
Owner
State
State Highway Agency

About this bridge

US081 over Big Sioux Rv is a concrete continuous slab carrying US081 over Big Sioux Rv in Codington County, South Dakota. It was built in 1966, so it is 59 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 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 7,665 vehicles a day, roughly 9% of them trucks, projected to reach 10,976 by 2044. The structure is 119 ft (36.4 m) long and 69 ft wide. If it were closed, the detour would be 44.7 mi (72 km).

CarriesUS081
CrossesBig Sioux Rv
Location0.7 S JCT US 212
RouteU.S. Route 81
Coordinates44.88058, -97.10892
Functional classUrban Other Principal Arterial

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 protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.1 US tons
Inventory rating43.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length119 ft (36.4 m)
Longest span43 ft (13.1 m)
Deck width69 ft (20.9 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,665 (2024)
Projected traffic10,976 by 2044
Trucks9%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed44.7 mi (72 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US081 over Big Sioux Rv built?

It was built in 1966, making it 59 years old in 2025.

What condition is US081 over Big Sioux 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 May 2023.

How much traffic does US081 over Big Sioux Rv carry?

About 7,665 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is US081 over Big Sioux Rv?

The structure is 119 ft (36.4 m) long with a longest span of 43 ft (13.1 m) and a deck 69 ft wide.

Who owns US081 over Big Sioux Rv?

It is owned by the State Highway Agency.