US 78 over Indian Field Swamp
FairDorchester County, South Carolina · 4 MI SE of ST George · Structure no. 000000000000123
- Built
- 1921
- 104 years old, rebuilt 1968
- Condition
- Fair
- inspected May 2024
- Type
- Tee Beam
- Concrete
- Length
- 110 ft
- 5 main spans
- Daily traffic
- 7,500
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 78 over Indian Field Swamp is a concrete tee beam carrying US 78 over Indian Field Swamp in Dorchester County, South Carolina. It was built in 1921 and reconstructed in 1968, so it is 104 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 7,500 vehicles a day, roughly 13% of them trucks, projected to reach 13,050 by 2043. The structure is 110 ft (33.5 m) long and 48 ft wide. If it were closed, the detour would be 16.2 mi (26 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 | 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 78 over Indian Field Swamp built?
It was built in 1921, making it 104 years old in 2025. It was reconstructed in 1968.
What condition is US 78 over Indian Field 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 May 2024.
How much traffic does US 78 over Indian Field Swamp carry?
About 7,500 vehicles per day (2023 count), of which roughly 13% are trucks.
How long is US 78 over Indian Field Swamp?
The structure is 110 ft (33.5 m) long with a longest span of 22 ft (6.7 m) and a deck 48 ft wide.
Who owns US 78 over Indian Field Swamp?
It is owned by the State Highway Agency.