US321 over Sulphur Branch
FairGaston County, North Carolina · 5.6 Mi. N. Jct. NC275 · Structure no. 000000000710346
- Built
- 1987
- 38 years old
- Condition
- Fair
- inspected July 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 23 ft
- 2 main spans
- Daily traffic
- 41,000
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US321 over Sulphur Branch is a concrete continuous culvert carrying US321 over Sulphur Branch in Gaston County, North Carolina. It was built in 1987, so it is 38 years old, younger than the North Carolina average of 38.7 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 41,000 vehicles a day, roughly 12% of them trucks, projected to reach 82,000 by 2040. The structure is 23 ft (7 m) long. If it were closed, the detour would be 0.6 mi (1 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 |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US321 over Sulphur Branch built?
It was built in 1987, making it 38 years old in 2025.
What condition is US321 over Sulphur Branch 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 July 2024.
How much traffic does US321 over Sulphur Branch carry?
About 41,000 vehicles per day (2022 count), of which roughly 12% are trucks.
How long is US321 over Sulphur Branch?
The structure is 23 ft (7 m) long with a longest span of 11 ft (3.3 m).
Who owns US321 over Sulphur Branch?
It is owned by the State Highway Agency.