US Bridges

SD050 over I090

Fair

Brule County, South Dakota · Pukwana Interchange · Structure no. 000000008145124

Built
1964
61 years old, rebuilt 1998
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
252 ft
4 main spans
Daily traffic
284
2024 count
Owner
State
State Highway Agency

About this bridge

SD050 over I090 is a steel continuous stringer/multi-beam or girder carrying SD050 over I090 in Brule County, South Dakota. It was built in 1964 and reconstructed in 1998, so it is 61 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 284 vehicles a day, roughly 11% of them trucks, projected to reach 368 by 2044. The structure is 252 ft (76.9 m) long and 35 ft wide.

CarriesSD050
CrossesI090
LocationPukwana Interchange
RouteState Highway 50
Coordinates43.75306, -99.18279
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.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51.9 US tons
Inventory rating31.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length252 ft (76.9 m)
Longest span70 ft (21.3 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic284 (2024)
Projected traffic368 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SD050 over I090 built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1998.

What condition is SD050 over I090 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 March 2023.

How much traffic does SD050 over I090 carry?

About 284 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is SD050 over I090?

The structure is 252 ft (76.9 m) long with a longest span of 70 ft (21.3 m) and a deck 35 ft wide.

Who owns SD050 over I090?

It is owned by the State Highway Agency.