US Bridges

I090 E over ST Onge Oil RD (fas)

Fair

Lawrence County, South Dakota · 0.7 E US 85 S Interch · Structure no. 000000041160084

Built
1971
54 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
137 ft
3 main spans
Daily traffic
7,590
2024 count
Owner
State
State Highway Agency

About this bridge

I090 E over ST Onge Oil RD (fas) is a concrete continuous slab carrying I090 E over ST Onge Oil RD (fas) in Lawrence County, South Dakota. It was built in 1971, so it is 54 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 7,590 vehicles a day, roughly 17% of them trucks, projected to reach 11,916 by 2044. The structure is 137 ft (41.8 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 E
CrossesST Onge Oil RD (fas)
Location0.7 E US 85 S Interch
RouteInterstate 90
CountyLawrence County
StateSouth Dakota
Coordinates44.48355, -103.72929
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating40.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length137 ft (41.8 m)
Longest span50 ft (15.2 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,590 (2024)
Projected traffic11,916 by 2044
Trucks17%
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 E over ST Onge Oil RD (fas) built?

It was built in 1971, making it 54 years old in 2025.

What condition is I090 E over ST Onge Oil RD (fas) 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 September 2023.

How much traffic does I090 E over ST Onge Oil RD (fas) carry?

About 7,590 vehicles per day (2024 count), of which roughly 17% are trucks.

How long is I090 E over ST Onge Oil RD (fas)?

The structure is 137 ft (41.8 m) long with a longest span of 50 ft (15.2 m) and a deck 41 ft wide.

Who owns I090 E over ST Onge Oil RD (fas)?

It is owned by the State Highway Agency.