US 21/ US 321 over Six Mile Creek
FairLexington County, South Carolina · 5 MI SW of Columbia · Structure no. 000000000002213
- Built
- 1955
- 70 years old, rebuilt 1988
- Condition
- Fair
- inspected October 2023
- Type
- Culvert
- Concrete
- Length
- 33 ft
- 3 main spans
- Daily traffic
- 23,200
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 21/ US 321 over Six Mile Creek is a concrete culvert carrying US 21/ US 321 over Six Mile Creek in Lexington County, South Carolina. It was built in 1955 and reconstructed in 1988, so it is 70 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 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 23,200 vehicles a day, roughly 5% of them trucks, projected to reach 36,424 by 2043. The structure is 33 ft (10.1 m) long and 84 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 |
|---|---|---|
| Channel and channel protection | 9 Excellent | No problems noted. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 21/ US 321 over Six Mile Creek built?
It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1988.
What condition is US 21/ US 321 over Six Mile Creek 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 October 2023.
How much traffic does US 21/ US 321 over Six Mile Creek carry?
About 23,200 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is US 21/ US 321 over Six Mile Creek?
The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m) and a deck 84 ft wide.
Who owns US 21/ US 321 over Six Mile Creek?
It is owned by the State Highway Agency.