I090 E over 300 Ave
FairLyman County, South Dakota · 7.5 E US 83 N Interchange · Structure no. 000000043100202
- Built
- 1970
- 55 years old
- Condition
- Fair
- inspected January 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 158 ft
- 3 main spans
- Daily traffic
- 3,787
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
I090 E over 300 Ave is a steel continuous stringer/multi-beam or girder carrying I090 E over 300 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 3,787 vehicles a day, roughly 26% of them trucks, projected to reach 5,408 by 2044. The structure is 158 ft (48.2 m) long and 41 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I090 E over 300 Ave built?
It was built in 1970, making it 55 years old in 2025.
What condition is I090 E over 300 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 January 2023.
How much traffic does I090 E over 300 Ave carry?
About 3,787 vehicles per day (2024 count), of which roughly 26% are trucks.
How long is I090 E over 300 Ave?
The structure is 158 ft (48.2 m) long with a longest span of 60 ft (18.3 m) and a deck 41 ft wide.
Who owns I090 E over 300 Ave?
It is owned by the State Highway Agency.