US Bridges

SD090 L over Mo. Rv (francis Case Lk)

Fair

Brule County, South Dakota · At Chamberlain · Structure no. 000000008068084

Built
1953
72 years old, rebuilt 2010
Condition
Fair
inspected May 2024
Type
Truss - Thru
Steel
Length
2,004 ft
5 main spans
Daily traffic
1,652
2023 count
Owner
State
State Highway Agency

About this bridge

SD090 L over Mo. Rv (francis Case Lk) is a steel truss - thru carrying SD090 L over Mo. Rv (francis Case Lk) in Brule County, South Dakota. It was built in 1953 and reconstructed in 2010, so it is 72 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 1,652 vehicles a day, roughly 4% of them trucks, projected to reach 1,895 by 2043. The structure is 2,004 ft (610.7 m) long and 50 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSD090 L
CrossesMo. Rv (francis Case Lk)
LocationAt Chamberlain
RouteState Highway 90
CountyBrule County
StateSouth Dakota
Coordinates43.81051, -99.33442
Functional classRural Minor Arterial

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 evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating58.9 US tons
Inventory rating35.3 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans5 (+6 approach)
Design loadHS 20 + Mod
Structure length2,004 ft (610.7 m)
Longest span338 ft (103 m)
Deck width50 ft (15.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deck16 ft (4.8 m)

Traffic and service

Average daily traffic1,652 (2023)
Projected traffic1,895 by 2043
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$23 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SD090 L over Mo. Rv (francis Case Lk) built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 2010.

What condition is SD090 L 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 SD090 L over Mo. Rv (francis Case Lk) carry?

About 1,652 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is SD090 L over Mo. Rv (francis Case Lk)?

The structure is 2,004 ft (610.7 m) long with a longest span of 338 ft (103 m) and a deck 50 ft wide.

Who owns SD090 L over Mo. Rv (francis Case Lk)?

It is owned by the State Highway Agency.