US Bridges

US081 over I029

Fair

Codington County, South Dakota · 3 N US 212 Interchange · Structure no. 000000015215150

Built
1973
52 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
290 ft
2 main spans
Daily traffic
1,691
2024 count
Owner
State
State Highway Agency

About this bridge

US081 over I029 is a steel continuous stringer/multi-beam or girder carrying US081 over I029 in Codington County, South Dakota. It was built in 1973, so it is 52 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.

It carries about 1,691 vehicles a day, roughly 4% of them trucks, projected to reach 2,379 by 2044. The structure is 290 ft (88.5 m) long and 47 ft wide.

CarriesUS081
CrossesI029
Location3 N US 212 Interchange
RouteU.S. Route 81
Coordinates44.93373, -97.05529
Functional classRural Minor 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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61.7 US tons
Inventory rating36.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length290 ft (88.5 m)
Longest span111 ft (33.8 m)
Deck width47 ft (14.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,691 (2024)
Projected traffic2,379 by 2044
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US081 over I029 built?

It was built in 1973, making it 52 years old in 2025.

What condition is US081 over I029 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 I029 carry?

About 1,691 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is US081 over I029?

The structure is 290 ft (88.5 m) long with a longest span of 111 ft (33.8 m) and a deck 47 ft wide.

Who owns US081 over I029?

It is owned by the State Highway Agency.