Grindstone Road over Cottonwood Ck
FairJackson County, South Dakota · 2W & 0.8N Cottonwood · Structure no. 000000036100012
- Built
- 1976
- 49 years old
- Condition
- Fair
- inspected September 2023
- Type
- Slab
- Concrete Continuous
- Length
- 76 ft
- 3 main spans
- Daily traffic
- 41
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Grindstone Road over Cottonwood Ck is a concrete continuous slab carrying Grindstone Road over Cottonwood Ck in Jackson County, South Dakota. It was built in 1976, so it is 49 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 41 vehicles a day, roughly 2% of them trucks, projected to reach 41 by 2032. The structure is 76 ft (23.2 m) long and 30 ft wide. If it were closed, the detour would be 11.2 mi (18 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Grindstone Road over Cottonwood Ck built?
It was built in 1976, making it 49 years old in 2025.
What condition is Grindstone Road 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 September 2023.
How much traffic does Grindstone Road over Cottonwood Ck carry?
About 41 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is Grindstone Road over Cottonwood Ck?
The structure is 76 ft (23.2 m) long with a longest span of 25 ft (7.6 m) and a deck 30 ft wide.
Who owns Grindstone Road over Cottonwood Ck?
It is owned by the County Highway Agency.