US Bridges

I090 W over County RD

Fair

Jackson County, South Dakota · 4.0 W Sd 73 N Interch · Structure no. 000000036200110

Built
1967
58 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete Continuous
Length
119 ft
3 main spans
Daily traffic
3,525
2024 count
Owner
State
State Highway Agency

About this bridge

I090 W over County RD is a concrete continuous slab carrying I090 W over County RD in Jackson County, South Dakota. It was built in 1967, so it is 58 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 3,525 vehicles a day, roughly 28% of them trucks, projected to reach 4,956 by 2044. The structure is 119 ft (36.3 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI090 W
CrossesCounty RD
Location4.0 W Sd 73 N Interch
RouteInterstate 90
CountyJackson County
StateSouth Dakota
Coordinates43.83616, -101.74096
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.7 US tons
Inventory rating31.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length119 ft (36.3 m)
Longest span43 ft (13.1 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,525 (2024)
Projected traffic4,956 by 2044
Trucks28%
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 County RD built?

It was built in 1967, making it 58 years old in 2025.

What condition is I090 W over County RD 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 April 2023.

How much traffic does I090 W over County RD carry?

About 3,525 vehicles per day (2024 count), of which roughly 28% are trucks.

How long is I090 W over County RD?

The structure is 119 ft (36.3 m) long with a longest span of 43 ft (13.1 m) and a deck 41 ft wide.

Who owns I090 W over County RD?

It is owned by the State Highway Agency.