US 378 over Big Swamp
GoodFlorence County, South Carolina · 1MI W of Salem · Structure no. 000000000001372
- Built
- 2017
- 8 years old
- Condition
- Good
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 361 ft
- 5 main spans
- Daily traffic
- 5,800
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 378 over Big Swamp is a prestressed concrete continuous stringer/multi-beam or girder carrying US 378 over Big Swamp in Florence County, South Carolina. It was built in 2017, so it is 8 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 5,800 vehicles a day, roughly 8% of them trucks, projected to reach 10,092 by 2043. The structure is 361 ft (109.9 m) long and 86 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 378 over Big Swamp built?
It was built in 2017, making it 8 years old in 2025.
What condition is US 378 over Big 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 March 2024.
How much traffic does US 378 over Big Swamp carry?
About 5,800 vehicles per day (2023 count), of which roughly 8% are trucks.
How long is US 378 over Big Swamp?
The structure is 361 ft (109.9 m) long with a longest span of 83 ft (25.3 m) and a deck 86 ft wide.
Who owns US 378 over Big Swamp?
It is owned by the State Highway Agency.