S-20-20 over I-77
FairFairfield County, South Carolina · 8MI NE Winnsboro · Structure no. 000000000007356
- Built
- 1980
- 45 years old
- Condition
- Fair
- inspected April 2023
- Type
- Frame
- Steel Continuous
- Length
- 284 ft
- 5 main spans
- Daily traffic
- 100
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S-20-20 over I-77 is a steel continuous frame carrying S-20-20 over I-77 in Fairfield County, South Carolina. It was built in 1980, so it is 45 years old, younger 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 100 vehicles a day, roughly 16% of them trucks, projected to reach 146 by 2043. The structure is 284 ft (86.6 m) long and 63 ft wide. If it were closed, the detour would be 6.8 mi (11 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 | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S-20-20 over I-77 built?
It was built in 1980, making it 45 years old in 2025.
What condition is S-20-20 over I-77 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 April 2023.
How much traffic does S-20-20 over I-77 carry?
About 100 vehicles per day (2023 count), of which roughly 16% are trucks.
How long is S-20-20 over I-77?
The structure is 284 ft (86.6 m) long with a longest span of 86 ft (26.2 m) and a deck 63 ft wide.
Who owns S-20-20 over I-77?
It is owned by the State Highway Agency.