US085 over I090
FairLawrence County, South Dakota · US 85 Interchange · Structure no. 000000041095059
- Built
- 1971
- 54 years old, rebuilt 2011
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 331 ft
- 4 main spans
- Daily traffic
- 4,211
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US085 over I090 is a steel continuous stringer/multi-beam or girder carrying US085 over I090 in Lawrence County, South Dakota. It was built in 1971 and reconstructed in 2011, so it is 54 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 4,211 vehicles a day, roughly 9% of them trucks, projected to reach 5,697 by 2043. The structure is 331 ft (100.8 m) long and 87 ft wide.
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US085 over I090 built?
It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2011.
What condition is US085 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 October 2023.
How much traffic does US085 over I090 carry?
About 4,211 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is US085 over I090?
The structure is 331 ft (100.8 m) long with a longest span of 106 ft (32.3 m) and a deck 87 ft wide.
Who owns US085 over I090?
It is owned by the State Highway Agency.