US 17 SB over Ashley River
FairPosted for loadCharleston County, South Carolina · In Charleston · Structure no. 000000000000228
- Built
- 1926
- 99 years old, rebuilt 1988
- Condition
- Fair
- inspected November 2024
- Type
- Movable - Bascule
- Steel
- Length
- 1,733 ft
- 1 main span
- Daily traffic
- 38,250
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 17 SB over Ashley River is a steel movable - bascule carrying US 17 SB over Ashley River in Charleston County, South Carolina. It was built in 1926 and reconstructed in 1988, so it is 99 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. Its operating status is: posted for load restriction.
It carries about 38,250 vehicles a day, roughly 2% of them trucks, projected to reach 54,698 by 2043. The structure is 1,733 ft (528.2 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 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 SB over Ashley River built?
It was built in 1926, making it 99 years old in 2025. It was reconstructed in 1988.
What condition is US 17 SB over Ashley River 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 November 2024.
How much traffic does US 17 SB over Ashley River carry?
About 38,250 vehicles per day (2023 count), of which roughly 2% are trucks.
How long is US 17 SB over Ashley River?
The structure is 1,733 ft (528.2 m) long with a longest span of 146 ft (44.5 m) and a deck 46 ft wide.
Who owns US 17 SB over Ashley River?
It is owned by the State Highway Agency.