US018 over Cottonwood Ck
FairTripp County, South Dakota · 0.5 E JCT US 183N · Structure no. 000000062115270
- Built
- 1965
- 60 years old
- Condition
- Fair
- inspected October 2024
- Type
- Slab
- Concrete Continuous
- Length
- 67 ft
- 3 main spans
- Daily traffic
- 1,746
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
US018 over Cottonwood Ck is a concrete continuous slab carrying US018 over Cottonwood Ck in Tripp County, South Dakota. It was built in 1965, so it is 60 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 1,746 vehicles a day, roughly 17% of them trucks, projected to reach 2,369 by 2044. The structure is 67 ft (20.4 m) long and 47 ft wide. If it were closed, the detour would be 67.1 mi (108 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US018 over Cottonwood Ck built?
It was built in 1965, making it 60 years old in 2025.
What condition is US018 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 October 2024.
How much traffic does US018 over Cottonwood Ck carry?
About 1,746 vehicles per day (2024 count), of which roughly 17% are trucks.
How long is US018 over Cottonwood Ck?
The structure is 67 ft (20.4 m) long with a longest span of 23 ft (7.1 m) and a deck 47 ft wide.
Who owns US018 over Cottonwood Ck?
It is owned by the State Highway Agency.