US Bridges

I090 W over 175 Ave

Fair

Pennington County, South Dakota · 6 W Wasta Interch · Structure no. 000000052750284

Built
1960
65 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
86 ft
3 main spans
Daily traffic
4,790
2024 count
Owner
State
State Highway Agency

About this bridge

I090 W over 175 Ave is a concrete continuous slab carrying I090 W over 175 Ave in Pennington County, South Dakota. It was built in 1960, so it is 65 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 4,790 vehicles a day, roughly 26% of them trucks, projected to reach 6,720 by 2044. The structure is 86 ft (26.2 m) long and 44 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI090 W
Crosses175 Ave
Location6 W Wasta Interch
RouteInterstate 90
CountyPennington County
StateSouth Dakota
Coordinates44.10343, -102.54808
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.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.3 US tons
Inventory rating37.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length86 ft (26.2 m)
Longest span31 ft (9.4 m)
Deck width44 ft (13.5 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,790 (2024)
Projected traffic6,720 by 2044
Trucks26%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I090 W over 175 Ave built?

It was built in 1960, making it 65 years old in 2025.

What condition is I090 W over 175 Ave 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 I090 W over 175 Ave carry?

About 4,790 vehicles per day (2024 count), of which roughly 26% are trucks.

How long is I090 W over 175 Ave?

The structure is 86 ft (26.2 m) long with a longest span of 31 ft (9.4 m) and a deck 44 ft wide.

Who owns I090 W over 175 Ave?

It is owned by the State Highway Agency.