US Bridges

I090 W over FAS County RD

Fair

Lawrence County, South Dakota · 3 W US 85 Interch · Structure no. 000000041061056

Built
1974
51 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
174 ft
3 main spans
Daily traffic
3,462
2024 count
Owner
State
State Highway Agency

About this bridge

I090 W over FAS County RD is a steel continuous stringer/multi-beam or girder carrying I090 W over FAS County RD in Lawrence County, South Dakota. It was built in 1974, so it is 51 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 3,462 vehicles a day, roughly 18% of them trucks, projected to reach 5,338 by 2044. The structure is 174 ft (53.1 m) long and 43 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI090 W
CrossesFAS County RD
Location3 W US 85 Interch
RouteInterstate 90
CountyLawrence County
StateSouth Dakota
Coordinates44.52299, -103.92942
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2025
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 alignment7: Better than present minimum criteria
Operating rating62.1 US tons
Inventory rating37.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length174 ft (53.1 m)
Longest span70 ft (21.3 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,462 (2024)
Projected traffic5,338 by 2044
Trucks18%
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 FAS County RD built?

It was built in 1974, making it 51 years old in 2025.

What condition is I090 W over FAS 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 February 2025.

How much traffic does I090 W over FAS County RD carry?

About 3,462 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is I090 W over FAS County RD?

The structure is 174 ft (53.1 m) long with a longest span of 70 ft (21.3 m) and a deck 43 ft wide.

Who owns I090 W over FAS County RD?

It is owned by the State Highway Agency.