I090 E over 468 Ave Drainage

Fair

Minnehaha County, South Dakota · 2.2 E Sd 38 Interch · Structure no. 000000050140166

Built: 1961; 64 years old
Condition: Fair; inspected February 2024
Type: Slab; Concrete Continuous
Length: 164 ft; 4 main spans
Daily traffic: 8,815; 2024 count
Owner: State; State Highway Agency

About this bridge

I090 E over 468 Ave Drainage is a concrete continuous slab carrying I090 E over 468 Ave Drainage in Minnehaha County, South Dakota. It was built in 1961, so it is 64 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 8,815 vehicles a day, roughly 19% of them trucks, projected to reach 13,267 by 2044. The structure is 164 ft (50 m) long and 34 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI090 E

Crosses468 Ave Drainage

Location2.2 E Sd 38 Interch

RouteInterstate 90

CountyMinnehaha County

StateSouth Dakota

Coordinates43.60845, -96.85047

Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

Component	Rating	Meaning
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	6 Satisfactory	Structural elements show some minor deterioration.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionFebruary 2024

Inspection intervalevery 48 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation6: Equal to present minimum criteria

Deck geometry2: Basically intolerable, requiring high priority of replacement

Waterway adequacy9: Superior to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating69.1 US tons

Inventory rating41.3 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans4

Design loadHS 20 + Mod

Structure length164 ft (50 m)

Longest span43 ft (13 m)

Deck width34 ft (10.5 m)

Roadway width30 ft (9.1 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,815 (2024)

Projected traffic13,267 by 2044

Trucks19%

Lanes on structure2

Traffic directionOne-way traffic

CarriesHighway

CrossesHighway and waterway

Detour if closed0.6 mi (1 km)

TollOn a free road

National Highway SystemYes

Strategic Highway NetworkInterstate STRAHNET route

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$650,000

NavigationNo navigation control on waterway

Frequently asked questions

When was I090 E over 468 Ave Drainage built?

It was built in 1961, making it 64 years old in 2025.

What condition is I090 E over 468 Ave Drainage 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 February 2024.

How much traffic does I090 E over 468 Ave Drainage carry?

About 8,815 vehicles per day (2024 count), of which roughly 19% are trucks.

How long is I090 E over 468 Ave Drainage?

The structure is 164 ft (50 m) long with a longest span of 43 ft (13 m) and a deck 34 ft wide.

Who owns I090 E over 468 Ave Drainage?

It is owned by the State Highway Agency.