US Bridges

I229 NF (western) over Big Sioux Rv

Fair

Minnehaha County, South Dakota · 0.1 S I 229 Interch · Structure no. 000000050191239

Built
1995
30 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
355 ft
4 main spans
Daily traffic
17,000
2023 count
Owner
State
State Highway Agency

About this bridge

I229 NF (western) over Big Sioux Rv is a prestressed concrete continuous stringer/multi-beam or girder carrying I229 NF (western) over Big Sioux Rv in Minnehaha County, South Dakota. It was built in 1995, so it is 30 years old, younger 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 17,000 vehicles a day, roughly 1% of them trucks, projected to reach 17,000 by 2043. The structure is 355 ft (108.3 m) long and 85 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesI229 NF (western)
CrossesBig Sioux Rv
Location0.1 S I 229 Interch
RouteInterstate 229
CountyMinnehaha County
StateSouth Dakota
Coordinates43.50206, -96.74863
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating75.4 US tons
Inventory rating45.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length355 ft (108.3 m)
Longest span93 ft (28.2 m)
Deck width85 ft (25.8 m)
Roadway width76 ft (23.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,000 (2023)
Projected traffic17,000 by 2043
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 km)
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I229 NF (western) over Big Sioux Rv built?

It was built in 1995, making it 30 years old in 2025.

What condition is I229 NF (western) 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 October 2023.

How much traffic does I229 NF (western) over Big Sioux Rv carry?

About 17,000 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is I229 NF (western) over Big Sioux Rv?

The structure is 355 ft (108.3 m) long with a longest span of 93 ft (28.2 m) and a deck 85 ft wide.

Who owns I229 NF (western) over Big Sioux Rv?

It is owned by the State Highway Agency.