US Bridges

258 ST (fas 6364) over I029

Fair

Minnehaha County, South Dakota · 2.2 N I 90 Interchange · Structure no. 000000050180140

Built
1962
63 years old, rebuilt 1989
Condition
Fair
inspected March 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
254 ft
4 main spans
Daily traffic
2,906
2023 count
Owner
State
State Highway Agency

About this bridge

258 ST (fas 6364) over I029 is a steel continuous stringer/multi-beam or girder carrying 258 ST (fas 6364) over I029 in Minnehaha County, South Dakota. It was built in 1962 and reconstructed in 1989, so it is 63 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 2,906 vehicles a day, roughly 3% of them trucks, projected to reach 2,906 by 2043. The structure is 254 ft (77.4 m) long and 35 ft wide.

Location

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Carries258 ST (fas 6364)
CrossesI029
Location2.2 N I 90 Interchange
RouteCounty Highway 0
CountyMinnehaha County
StateSouth Dakota
Coordinates43.64535, -96.77077
Functional classRural Major Collector

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 inspectionMarch 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating52 US tons
Inventory rating31.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length254 ft (77.4 m)
Longest span70 ft (21.3 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,906 (2023)
Projected traffic2,906 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 258 ST (fas 6364) over I029 built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1989.

What condition is 258 ST (fas 6364) 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 March 2025.

How much traffic does 258 ST (fas 6364) over I029 carry?

About 2,906 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is 258 ST (fas 6364) over I029?

The structure is 254 ft (77.4 m) long with a longest span of 70 ft (21.3 m) and a deck 35 ft wide.

Who owns 258 ST (fas 6364) over I029?

It is owned by the State Highway Agency.