US 21 over Black Creek
FairColleton County, South Carolina · 14.0 MI SW of Walterboro · Structure no. 000000000000780
- Built
- 1937
- 88 years old, rebuilt 1971
- Condition
- Fair
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 125 ft
- 5 main spans
- Daily traffic
- 1,350
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 21 over Black Creek is a steel continuous stringer/multi-beam or girder carrying US 21 over Black Creek in Colleton County, South Carolina. It was built in 1937 and reconstructed in 1971, so it is 88 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 1,350 vehicles a day, roughly 28% of them trucks, projected to reach 2,147 by 2043. The structure is 125 ft (38.1 m) long and 47 ft wide. If it were closed, the detour would be 19.3 mi (31 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 21 over Black Creek built?
It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1971.
What condition is US 21 over Black 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 March 2024.
How much traffic does US 21 over Black Creek carry?
About 1,350 vehicles per day (2023 count), of which roughly 28% are trucks.
How long is US 21 over Black Creek?
The structure is 125 ft (38.1 m) long with a longest span of 25 ft (7.6 m) and a deck 47 ft wide.
Who owns US 21 over Black Creek?
It is owned by the State Highway Agency.