Thunderhead Falls over Rapid Ck
GoodPennington County, South Dakota · Off Thunderhead Fall · Structure no. 000000052316320
- Built
- 1972
- 53 years old
- Condition
- Good
- inspected June 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 30 ft
- 1 main span
- Daily traffic
- 10
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Thunderhead Falls over Rapid Ck is a prestressed concrete tee beam carrying Thunderhead Falls over Rapid Ck in Pennington County, South Dakota. It was built in 1972, so it is 53 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 10 vehicles a day, roughly 2% of them trucks, projected to reach 10 by 2032. The structure is 30 ft (9.1 m) long and 15 ft wide. If it were closed, the detour would be 98.8 mi (159 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| 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 Thunderhead Falls over Rapid Ck built?
It was built in 1972, making it 53 years old in 2025.
What condition is Thunderhead Falls over Rapid Ck in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.
How much traffic does Thunderhead Falls over Rapid Ck carry?
About 10 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is Thunderhead Falls over Rapid Ck?
The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 15 ft wide.
Who owns Thunderhead Falls over Rapid Ck?
It is owned by the County Highway Agency.