218 ST over Lk Thompson Outlet
FairKingsbury County, South Dakota · S End Lk Thompson · Structure no. 000000039203220
- Built
- 1988
- 37 years old, rebuilt 1999
- Condition
- Fair
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 40 ft
- 1 main span
- Daily traffic
- 415
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
218 ST over Lk Thompson Outlet is a prestressed concrete stringer/multi-beam or girder carrying 218 ST over Lk Thompson Outlet in Kingsbury County, South Dakota. It was built in 1988 and reconstructed in 1999, so it is 37 years old, younger 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 415 vehicles a day, roughly 2% of them trucks, projected to reach 415 by 2032. The structure is 40 ft (12.2 m) long and 34 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 218 ST over Lk Thompson Outlet built?
It was built in 1988, making it 37 years old in 2025. It was reconstructed in 1999.
What condition is 218 ST over Lk Thompson Outlet 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 August 2023.
How much traffic does 218 ST over Lk Thompson Outlet carry?
About 415 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 218 ST over Lk Thompson Outlet?
The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.9 m) and a deck 34 ft wide.
Who owns 218 ST over Lk Thompson Outlet?
It is owned by the County Highway Agency.