S-45-143 over Thorntree Swamp
PoorClosed to trafficWilliamsburg County, South Carolina · 1.25 MI E of Salters · Structure no. 000000000006385
- Built
- 1973
- 52 years old
- Condition
- Poor
- inspected August 2024
- Type
- Slab
- Concrete
- Length
- 60 ft
- 4 main spans
- Daily traffic
- 150
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S-45-143 over Thorntree Swamp is a concrete slab carrying S-45-143 over Thorntree Swamp in Williamsburg County, South Carolina. It was built in 1973, so it is 52 years old, older than the South Carolina average of 48 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.
It carries about 150 vehicles a day, roughly 13% of them trucks, projected to reach 192 by 2024. The structure is 60 ft (18.3 m) long and 28 ft wide.
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S-45-143 over Thorntree Swamp built?
It was built in 1973, making it 52 years old in 2025.
What condition is S-45-143 over Thorntree Swamp in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.
How much traffic does S-45-143 over Thorntree Swamp carry?
About 150 vehicles per day (2023 count), of which roughly 13% are trucks.
How long is S-45-143 over Thorntree Swamp?
The structure is 60 ft (18.3 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.
Who owns S-45-143 over Thorntree Swamp?
It is owned by the State Highway Agency.