I090 W over Cooper School RD
GoodLyman County, South Dakota · 1 W Oacoma Interch · Structure no. 000000043475267
- Built
- 1971
- 54 years old
- Condition
- Good
- inspected July 2024
- Type
- Slab
- Concrete Continuous
- Length
- 119 ft
- 3 main spans
- Daily traffic
- 3,720
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
I090 W over Cooper School RD is a concrete continuous slab carrying I090 W over Cooper School RD in Lyman County, South Dakota. It was built in 1971, 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 3,720 vehicles a day, roughly 29% of them trucks, projected to reach 5,312 by 2044. The structure is 119 ft (36.3 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
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| 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 I090 W over Cooper School RD built?
It was built in 1971, making it 54 years old in 2025.
What condition is I090 W over Cooper School RD in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.
How much traffic does I090 W over Cooper School RD carry?
About 3,720 vehicles per day (2024 count), of which roughly 29% are trucks.
How long is I090 W over Cooper School RD?
The structure is 119 ft (36.3 m) long with a longest span of 43 ft (13.1 m) and a deck 41 ft wide.
Who owns I090 W over Cooper School RD?
It is owned by the State Highway Agency.