US 17 Alt over Wadboo Swamp
FairBerkeley County, South Carolina · 8 MI NE of Moncks Corner · Structure no. 000000000006228
- Built
- 1973
- 52 years old
- Condition
- Fair
- inspected October 2023
- Type
- Slab
- Concrete
- Length
- 120 ft
- 4 main spans
- Daily traffic
- 9,300
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 17 Alt over Wadboo Swamp is a concrete slab carrying US 17 Alt over Wadboo Swamp in Berkeley County, South Carolina. It was built in 1973, so it is 52 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 9,300 vehicles a day, roughly 9% of them trucks, projected to reach 14,787 by 2043. The structure is 120 ft (36.6 m) long and 48 ft wide. If it were closed, the detour would be 11.2 mi (18 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 17 Alt over Wadboo Swamp built?
It was built in 1973, making it 52 years old in 2025.
What condition is US 17 Alt over Wadboo Swamp 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 17 Alt over Wadboo Swamp carry?
About 9,300 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is US 17 Alt over Wadboo Swamp?
The structure is 120 ft (36.6 m) long with a longest span of 30 ft (9.1 m) and a deck 48 ft wide.
Who owns US 17 Alt over Wadboo Swamp?
It is owned by the State Highway Agency.