US 401 over Lake Swamp
GoodDarlington County, South Carolina · 3 MI NE of Lamar · Structure no. 000000000010298
- Built
- 2019
- 6 years old
- Condition
- Good
- inspected January 2024
- Type
- Slab
- Concrete Continuous
- Length
- 150 ft
- 5 main spans
- Daily traffic
- 3,200
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 401 over Lake Swamp is a concrete continuous slab carrying US 401 over Lake Swamp in Darlington County, South Carolina. It was built in 2019, so it is 6 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 3,200 vehicles a day, roughly 15% of them trucks, projected to reach 2,464 by 2043. The structure is 150 ft (45.7 m) long and 47 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 401 over Lake Swamp built?
It was built in 2019, making it 6 years old in 2025.
What condition is US 401 over Lake Swamp 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 January 2024.
How much traffic does US 401 over Lake Swamp carry?
About 3,200 vehicles per day (2023 count), of which roughly 15% are trucks.
How long is US 401 over Lake Swamp?
The structure is 150 ft (45.7 m) long with a longest span of 30 ft (9.1 m) and a deck 47 ft wide.
Who owns US 401 over Lake Swamp?
It is owned by the State Highway Agency.