S-18-180 over Polk Swamp
GoodDorchester County, South Carolina · 2 MI S ST George · Structure no. 000000000001701
- Built
- 1957
- 68 years old, rebuilt 2010
- Condition
- Good
- inspected May 2023
- Type
- Slab
- Concrete
- Length
- 105 ft
- 7 main spans
- Daily traffic
- 175
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S-18-180 over Polk Swamp is a concrete slab carrying S-18-180 over Polk Swamp in Dorchester County, South Carolina. It was built in 1957 and reconstructed in 2010, so it is 68 years old, older 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 175 vehicles a day, roughly 5% of them trucks, projected to reach 224 by 2043. The structure is 105 ft (32 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S-18-180 over Polk Swamp built?
It was built in 1957, making it 68 years old in 2025. It was reconstructed in 2010.
What condition is S-18-180 over Polk Swamp 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 May 2023.
How much traffic does S-18-180 over Polk Swamp carry?
About 175 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is S-18-180 over Polk Swamp?
The structure is 105 ft (32 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.
Who owns S-18-180 over Polk Swamp?
It is owned by the State Highway Agency.