US Bridges

281 ST over I029

Fair

Lincoln County, South Dakota · 1 N US 18 E Interch · Structure no. 000000042065130

Built
1958
67 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
254 ft
4 main spans
Daily traffic
25
2023 count
Owner
State
State Highway Agency

About this bridge

281 ST over I029 is a concrete continuous slab carrying 281 ST over I029 in Lincoln County, South Dakota. It was built in 1958, so it is 67 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 25 vehicles a day, roughly 2% of them trucks, projected to reach 25 by 2043. The structure is 254 ft (77.4 m) long and 28 ft wide.

Location

Open in Google Maps
Carries281 ST
CrossesI029
Location1 N US 18 E Interch
RouteCounty Highway 0
CountyLincoln County
StateSouth Dakota
Coordinates43.31587, -96.79593
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 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 geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating63.3 US tons
Inventory rating37.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length254 ft (77.4 m)
Longest span65 ft (19.8 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2023)
Projected traffic25 by 2043
Trucks2%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$735,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was 281 ST over I029 built?

It was built in 1958, making it 67 years old in 2025.

What condition is 281 ST 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 July 2023.

How much traffic does 281 ST over I029 carry?

About 25 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is 281 ST over I029?

The structure is 254 ft (77.4 m) long with a longest span of 65 ft (19.8 m) and a deck 28 ft wide.

Who owns 281 ST over I029?

It is owned by the State Highway Agency.