US 17 Alt over Unnamed Stream
GoodDorchester County, South Carolina · Town of Summerville · Structure no. 000000000001871
- Built
- 1952
- 73 years old, rebuilt 1975
- Condition
- Good
- inspected May 2024
- Type
- Culvert
- Concrete
- Length
- 22 ft
- 2 main spans
- Daily traffic
- 16,500
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 17 Alt over Unnamed Stream is a concrete culvert carrying US 17 Alt over Unnamed Stream in Dorchester County, South Carolina. It was built in 1952 and reconstructed in 1975, so it is 73 years old, older than the South Carolina average of 48 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 16,500 vehicles a day, roughly 4% of them trucks, projected to reach 23,595 by 2043. The structure is 22 ft (6.7 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 17 Alt over Unnamed Stream built?
It was built in 1952, making it 73 years old in 2025. It was reconstructed in 1975.
What condition is US 17 Alt over Unnamed Stream in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.
How much traffic does US 17 Alt over Unnamed Stream carry?
About 16,500 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is US 17 Alt over Unnamed Stream?
The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 56 ft wide.
Who owns US 17 Alt over Unnamed Stream?
It is owned by the State Highway Agency.