US 15 over Four Hole Swamp
FairDorchester County, South Carolina · 10.2 MI N of ST George · Structure no. 000000000001291
- Built
- 2006
- 19 years old
- Condition
- Fair
- inspected April 2024
- Type
- Slab
- Concrete Continuous
- Length
- 150 ft
- 5 main spans
- Daily traffic
- 2,400
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 15 over Four Hole Swamp is a concrete continuous slab carrying US 15 over Four Hole Swamp in Dorchester County, South Carolina. It was built in 2006, so it is 19 years old, younger 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 2,400 vehicles a day, roughly 15% of them trucks, projected to reach 3,504 by 2043. The structure is 150 ft (45.7 m) long and 47 ft wide. If it were closed, the detour would be 16.2 mi (26 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 15 over Four Hole Swamp built?
It was built in 2006, making it 19 years old in 2025.
What condition is US 15 over Four Hole 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 over Four Hole Swamp carry?
About 2,400 vehicles per day (2023 count), of which roughly 15% are trucks.
How long is US 15 over Four Hole Swamp?
The structure is 150 ft (45.7 m) long with a longest span of 30 ft (9.1 m) and a deck 47 ft wide.
Who owns US 15 over Four Hole Swamp?
It is owned by the State Highway Agency.