S-45-453 over Thorntree Swamp
FairWilliamsburg County, South Carolina · 4.0 MI N Lane · Structure no. 000000000005179
- Built
- 1967
- 58 years old, rebuilt 1995
- Condition
- Fair
- inspected October 2024
- Type
- Slab
- Concrete
- Length
- 75 ft
- 5 main spans
- Daily traffic
- 125
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S-45-453 over Thorntree Swamp is a concrete slab carrying S-45-453 over Thorntree Swamp in Williamsburg County, South Carolina. It was built in 1967 and reconstructed in 1995, so it is 58 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 125 vehicles a day, roughly 5% of them trucks, projected to reach 160 by 2043. The structure is 75 ft (22.9 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S-45-453 over Thorntree Swamp built?
It was built in 1967, making it 58 years old in 2025. It was reconstructed in 1995.
What condition is S-45-453 over Thorntree 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 October 2024.
How much traffic does S-45-453 over Thorntree Swamp carry?
About 125 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is S-45-453 over Thorntree Swamp?
The structure is 75 ft (22.9 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.
Who owns S-45-453 over Thorntree Swamp?
It is owned by the State Highway Agency.