US 15/HWY 15 over Polk Swamp
FairDorchester County, South Carolina · 3.4 MI S ST George · Structure no. 000000000000533
- Built
- 1931
- 94 years old, rebuilt 1976
- Condition
- Fair
- inspected April 2024
- Type
- Culvert
- Concrete
- Length
- 34 ft
- 3 main spans
- Daily traffic
- 2,700
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 15/HWY 15 over Polk Swamp is a concrete culvert carrying US 15/HWY 15 over Polk Swamp in Dorchester County, South Carolina. It was built in 1931 and reconstructed in 1976, so it is 94 years old, older than the South Carolina average of 48 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 2,700 vehicles a day, roughly 15% of them trucks, projected to reach 3,942 by 2043. The structure is 34 ft (10.4 m) long and 58 ft wide. If it were closed, the detour would be 28 mi (45 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 15/HWY 15 over Polk Swamp built?
It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1976.
What condition is US 15/HWY 15 over Polk Swamp 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 April 2024.
How much traffic does US 15/HWY 15 over Polk Swamp carry?
About 2,700 vehicles per day (2023 count), of which roughly 15% are trucks.
How long is US 15/HWY 15 over Polk Swamp?
The structure is 34 ft (10.4 m) long with a longest span of 10 ft (3 m) and a deck 58 ft wide.
Who owns US 15/HWY 15 over Polk Swamp?
It is owned by the State Highway Agency.