US Bridges

I090 Wf over American Crow Ck

FairPosted for load

Lyman County, South Dakota · 0.9 W Oacoma Interch · Structure no. 000000043477268

Built
1954
71 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
272 ft
5 main spans
Daily traffic
2,622
2023 count
Owner
State
State Highway Agency

About this bridge

I090 Wf over American Crow Ck is a steel stringer/multi-beam or girder carrying I090 Wf over American Crow Ck in Lyman County, South Dakota. It was built in 1954, so it is 71 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. Its operating status is: posted for load restriction.

It carries about 2,622 vehicles a day, roughly 1% of them trucks, projected to reach 2,622 by 2043. The structure is 272 ft (82.8 m) long and 32 ft wide.

Location

Open in Google Maps
CarriesI090 Wf
CrossesAmerican Crow Ck
Location0.9 W Oacoma Interch
RouteInterstate 90
CountyLyman County
StateSouth Dakota
Coordinates43.80645, -99.41036
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating38.3 US tons
Inventory rating22.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length272 ft (82.8 m)
Longest span53 ft (16.1 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,622 (2023)
Projected traffic2,622 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I090 Wf over American Crow Ck built?

It was built in 1954, making it 71 years old in 2025.

What condition is I090 Wf over American Crow Ck 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 December 2023.

How much traffic does I090 Wf over American Crow Ck carry?

About 2,622 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is I090 Wf over American Crow Ck?

The structure is 272 ft (82.8 m) long with a longest span of 53 ft (16.1 m) and a deck 32 ft wide.

Who owns I090 Wf over American Crow Ck?

It is owned by the State Highway Agency.