US 17 over US 21
GoodBeaufort County, South Carolina · 8 MI N of Beaufort · Structure no. 000000000009963
- Built
- 2009
- 16 years old
- Condition
- Good
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 96 ft
- 1 main span
- Daily traffic
- 13,200
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 17 over US 21 is a prestressed concrete stringer/multi-beam or girder carrying US 17 over US 21 in Beaufort County, South Carolina. It was built in 2009, so it is 16 years old, younger than the South Carolina average of 48 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 13,200 vehicles a day, roughly 16% of them trucks, projected to reach 22,968 by 2043. The structure is 96 ft (29.3 m) long and 86 ft wide. If it were closed, the detour would be 6.2 mi (10 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 17 over US 21 built?
It was built in 2009, making it 16 years old in 2025.
What condition is US 17 over US 21 in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.
How much traffic does US 17 over US 21 carry?
About 13,200 vehicles per day (2023 count), of which roughly 16% are trucks.
How long is US 17 over US 21?
The structure is 96 ft (29.3 m) long with a longest span of 96 ft (29.3 m) and a deck 86 ft wide.
Who owns US 17 over US 21?
It is owned by the State Highway Agency.