US Bridges

I090 over Mo. Rv (francis Case Lk)

Fair

Brule County, South Dakota · Chamberlain Bridge · Structure no. 000000008061094

Built
1974
51 years old
Condition
Fair
inspected May 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
2,031 ft
9 main spans
Daily traffic
7,260
2023 count
Owner
State
State Highway Agency

About this bridge

I090 over Mo. Rv (francis Case Lk) is a steel continuous girder and floorbeam system carrying I090 over Mo. Rv (francis Case Lk) in Brule 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 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 7,260 vehicles a day, roughly 23% of them trucks, projected to reach 8,894 by 2043. The structure is 2,031 ft (619 m) long and 81 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesI090
CrossesMo. Rv (francis Case Lk)
LocationChamberlain Bridge
RouteInterstate 90
CountyBrule County
StateSouth Dakota
Coordinates43.79705, -99.34652
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 12 months
Operating statusOpen, no 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 geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.6 US tons
Inventory rating23.4 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20 + Mod
Structure length2,031 ft (619 m)
Longest span250 ft (76.2 m)
Deck width81 ft (24.7 m)
Roadway width76 ft (23.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,260 (2023)
Projected traffic8,894 by 2043
Trucks23%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was I090 over Mo. Rv (francis Case Lk) built?

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

What condition is I090 over Mo. Rv (francis Case Lk) 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 May 2024.

How much traffic does I090 over Mo. Rv (francis Case Lk) carry?

About 7,260 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is I090 over Mo. Rv (francis Case Lk)?

The structure is 2,031 ft (619 m) long with a longest span of 250 ft (76.2 m) and a deck 81 ft wide.

Who owns I090 over Mo. Rv (francis Case Lk)?

It is owned by the State Highway Agency.