US 321 Byp over Sandy River
FairChester County, South Carolina · 2.0MI NW of Chester · Structure no. 000000000003218
- Built
- 1960
- 65 years old
- Condition
- Fair
- inspected August 2023
- Type
- Tee Beam
- Concrete
- Length
- 120 ft
- 4 main spans
- Daily traffic
- 1,700
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 321 Byp over Sandy River is a concrete tee beam carrying US 321 Byp over Sandy River in Chester County, South Carolina. It was built in 1960, so it is 65 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 1,700 vehicles a day, roughly 19% of them trucks, projected to reach 2,397 by 2043. The structure is 120 ft (36.6 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 321 Byp over Sandy River built?
It was built in 1960, making it 65 years old in 2025.
What condition is US 321 Byp over Sandy 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 August 2023.
How much traffic does US 321 Byp over Sandy River carry?
About 1,700 vehicles per day (2023 count), of which roughly 19% are trucks.
How long is US 321 Byp over Sandy River?
The structure is 120 ft (36.6 m) long with a longest span of 30 ft (9.1 m) and a deck 32 ft wide.
Who owns US 321 Byp over Sandy River?
It is owned by the State Highway Agency.