US 21 over Johnson Creek
FairBeaufort County, South Carolina · 13.8 MI SE Beaufort · Structure no. 000000000000924
- Built
- 2006
- 19 years old
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 648 ft
- 12 main spans
- Daily traffic
- 2,600
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 21 over Johnson Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying US 21 over Johnson Creek in Beaufort County, South Carolina. It was built in 2006, so it is 19 years old, younger 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 2,600 vehicles a day, roughly 8% of them trucks, projected to reach 4,134 by 2043. The structure is 648 ft (197.5 m) long and 47 ft wide.
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 | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 21 over Johnson Creek built?
It was built in 2006, making it 19 years old in 2025.
What condition is US 21 over Johnson 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 September 2024.
How much traffic does US 21 over Johnson Creek carry?
About 2,600 vehicles per day (2023 count), of which roughly 8% are trucks.
How long is US 21 over Johnson Creek?
The structure is 648 ft (197.5 m) long with a longest span of 54 ft (16.5 m) and a deck 47 ft wide.
Who owns US 21 over Johnson Creek?
It is owned by the State Highway Agency.