257 ST over Cottonwood Ck
FairTripp County, South Dakota · 0.6W & 15.9N Witten · Structure no. 000000062072071
- Built
- 2006
- 19 years old
- Condition
- Fair
- inspected June 2023
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 100 ft
- 1 main span
- Daily traffic
- 55
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
257 ST over Cottonwood Ck is a prestressed concrete tee beam carrying 257 ST over Cottonwood Ck in Tripp County, South Dakota. It was built in 2006, so it is 19 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 55 vehicles a day, roughly 9% of them trucks, projected to reach 64 by 2032. The structure is 100 ft (30.5 m) long and 32 ft wide. If it were closed, the detour would be 34.2 mi (55 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 257 ST over Cottonwood Ck built?
It was built in 2006, making it 19 years old in 2025.
What condition is 257 ST over Cottonwood Ck 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 June 2023.
How much traffic does 257 ST over Cottonwood Ck carry?
About 55 vehicles per day (2022 count), of which roughly 9% are trucks.
How long is 257 ST over Cottonwood Ck?
The structure is 100 ft (30.5 m) long with a longest span of 96 ft (29.3 m) and a deck 32 ft wide.
Who owns 257 ST over Cottonwood Ck?
It is owned by the County Highway Agency.