I-20 EB over Lake Swamp
FairDarlington County, South Carolina · 3MI NE of Lamar · Structure no. 000000000006260
- Built
- 1973
- 52 years old
- Condition
- Fair
- inspected January 2024
- Type
- Slab
- Concrete
- Length
- 120 ft
- 4 main spans
- Daily traffic
- 15,200
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-20 EB over Lake Swamp is a concrete slab carrying I-20 EB over Lake Swamp in Darlington 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 15,200 vehicles a day, roughly 16% of them trucks, projected to reach 11,400 by 2043. The structure is 120 ft (36.6 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-20 EB over Lake Swamp built?
It was built in 1973, making it 52 years old in 2025.
What condition is I-20 EB over Lake 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 January 2024.
How much traffic does I-20 EB over Lake Swamp carry?
About 15,200 vehicles per day (2023 count), of which roughly 16% are trucks.
How long is I-20 EB over Lake Swamp?
The structure is 120 ft (36.6 m) long with a longest span of 30 ft (9.1 m) and a deck 43 ft wide.
Who owns I-20 EB over Lake Swamp?
It is owned by the State Highway Agency.