I090 W over Big Ck I90 Wf
GoodLyman County, South Dakota · 2.2 W Oacoma Interch · Structure no. 000000043466261
- Built
- 1971
- 54 years old
- Condition
- Good
- inspected December 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 197 ft
- 3 main spans
- Daily traffic
- 3,720
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
I090 W over Big Ck I90 Wf is a prestressed concrete continuous stringer/multi-beam or girder carrying I090 W over Big Ck I90 Wf 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 197 ft (60 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. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I090 W over Big Ck I90 Wf built?
It was built in 1971, making it 54 years old in 2025.
What condition is I090 W over Big Ck I90 Wf 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 December 2024.
How much traffic does I090 W over Big Ck I90 Wf carry?
About 3,720 vehicles per day (2024 count), of which roughly 29% are trucks.
How long is I090 W over Big Ck I90 Wf?
The structure is 197 ft (60 m) long with a longest span of 75 ft (22.9 m) and a deck 41 ft wide.
Who owns I090 W over Big Ck I90 Wf?
It is owned by the State Highway Agency.