I090 W over 308 Ave
FairLyman County, South Dakota · 2 E US 183 Interch · Structure no. 000000043180205
- Built
- 1970
- 55 years old
- Condition
- Fair
- inspected April 2024
- Type
- Slab
- Concrete Continuous
- Length
- 106 ft
- 3 main spans
- Daily traffic
- 3,839
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
I090 W over 308 Ave is a concrete continuous slab carrying I090 W over 308 Ave in Lyman County, South Dakota. It was built in 1970, so it is 55 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 3,839 vehicles a day, roughly 27% of them trucks, projected to reach 5,482 by 2044. The structure is 106 ft (32.3 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 km).
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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I090 W over 308 Ave built?
It was built in 1970, making it 55 years old in 2025.
What condition is I090 W over 308 Ave 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 April 2024.
How much traffic does I090 W over 308 Ave carry?
About 3,839 vehicles per day (2024 count), of which roughly 27% are trucks.
How long is I090 W over 308 Ave?
The structure is 106 ft (32.3 m) long with a longest span of 38 ft (11.6 m) and a deck 41 ft wide.
Who owns I090 W over 308 Ave?
It is owned by the State Highway Agency.