US Bridges

256 Ave (fas 6511) over I090

Fair

Jones County, South Dakota · 6.2 W Okaton Interchange · Structure no. 000000038030185

Built
1969
56 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
303 ft
2 main spans
Daily traffic
23
2023 count
Owner
State
State Highway Agency

About this bridge

256 Ave (fas 6511) over I090 is a steel continuous stringer/multi-beam or girder carrying 256 Ave (fas 6511) over I090 in Jones County, South Dakota. It was built in 1969, so it is 56 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 23 vehicles a day, roughly 3% of them trucks, projected to reach 23 by 2043. The structure is 303 ft (92.5 m) long and 31 ft wide.

Carries256 Ave (fas 6511)
CrossesI090
Location6.2 W Okaton Interchange
RouteCounty Highway 0
Coordinates43.90142, -101.00474
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61.2 US tons
Inventory rating36.6 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length303 ft (92.5 m)
Longest span105 ft (32 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23 (2023)
Projected traffic23 by 2043
Trucks3%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$50,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was 256 Ave (fas 6511) over I090 built?

It was built in 1969, making it 56 years old in 2025.

What condition is 256 Ave (fas 6511) over I090 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 2024.

How much traffic does 256 Ave (fas 6511) over I090 carry?

About 23 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is 256 Ave (fas 6511) over I090?

The structure is 303 ft (92.5 m) long with a longest span of 105 ft (32 m) and a deck 31 ft wide.

Who owns 256 Ave (fas 6511) over I090?

It is owned by the State Highway Agency.