US 17 NB over Edisto River Swamp
FairCharleston County, South Carolina · Chas/Coll LN · Structure no. 000000000001930
- Built
- 1925
- 100 years old, rebuilt 1973
- Condition
- Fair
- inspected February 2024
- Type
- Tee Beam
- Concrete
- Length
- 110 ft
- 5 main spans
- Daily traffic
- 17,100
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 17 NB over Edisto River Swamp is a concrete tee beam carrying US 17 NB over Edisto River Swamp in Charleston County, South Carolina. It was built in 1925 and reconstructed in 1973, so it is 100 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 5 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 17,100 vehicles a day, roughly 10% of them trucks, projected to reach 29,754 by 2043. The structure is 110 ft (33.5 m) long and 75 ft wide. If it were closed, the detour would be 31.1 mi (50 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 17 NB over Edisto River Swamp built?
It was built in 1925, making it 100 years old in 2025. It was reconstructed in 1973.
What condition is US 17 NB over Edisto River 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 February 2024.
How much traffic does US 17 NB over Edisto River Swamp carry?
About 17,100 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is US 17 NB over Edisto River Swamp?
The structure is 110 ft (33.5 m) long with a longest span of 22 ft (6.7 m) and a deck 75 ft wide.
Who owns US 17 NB over Edisto River Swamp?
It is owned by the State Highway Agency.