Sc 171/FOLLY RD over Folly River
GoodCharleston County, South Carolina · On Folly Island · Structure no. 000000000002300
- Built
- 2016
- 9 years old
- Condition
- Good
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 1,050 ft
- 14 main spans
- Daily traffic
- 14,800
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Sc 171/FOLLY RD over Folly River is a prestressed concrete continuous stringer/multi-beam or girder carrying Sc 171/FOLLY RD over Folly River in Charleston County, South Carolina. It was built in 2016, so it is 9 years old, younger than the South Carolina average of 48 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 14,800 vehicles a day, roughly 2% of them trucks, projected to reach 21,904 by 2043. The structure is 1,050 ft (320 m) long and 49 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Sc 171/FOLLY RD over Folly River built?
It was built in 2016, making it 9 years old in 2025.
What condition is Sc 171/FOLLY RD over Folly River 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 August 2024.
How much traffic does Sc 171/FOLLY RD over Folly River carry?
About 14,800 vehicles per day (2023 count), of which roughly 2% are trucks.
How long is Sc 171/FOLLY RD over Folly River?
The structure is 1,050 ft (320 m) long with a longest span of 75 ft (22.9 m) and a deck 49 ft wide.
Who owns Sc 171/FOLLY RD over Folly River?
It is owned by the State Highway Agency.