Dark Canyon Road over Rapid Ck
FairPennington County, South Dakota · 1.5W 0.8S Fish Hatch · Structure no. 000000052361325
- Built
- 1973
- 52 years old
- Condition
- Fair
- inspected September 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 110 ft
- 3 main spans
- Daily traffic
- 262
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Dark Canyon Road over Rapid Ck is a prestressed concrete tee beam carrying Dark Canyon Road over Rapid Ck in Pennington County, South Dakota. It was built in 1973, so it is 52 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 262 vehicles a day, roughly 2% of them trucks, projected to reach 262 by 2032. The structure is 110 ft (33.5 m) long and 27 ft wide. If it were closed, the detour would be 98.8 mi (159 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Dark Canyon Road over Rapid Ck built?
It was built in 1973, making it 52 years old in 2025.
What condition is Dark Canyon Road over Rapid 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 2024.
How much traffic does Dark Canyon Road over Rapid Ck carry?
About 262 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is Dark Canyon Road over Rapid Ck?
The structure is 110 ft (33.5 m) long with a longest span of 49 ft (14.9 m) and a deck 27 ft wide.
Who owns Dark Canyon Road over Rapid Ck?
It is owned by the County Highway Agency.