I-77 SB over S-12-56
FairChester County, South Carolina · 0.7 SW of Richburg · Structure no. 000000000007081
- Built
- 1978
- 47 years old
- Condition
- Fair
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 196 ft
- 3 main spans
- Daily traffic
- 24,450
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-77 SB over S-12-56 is a steel stringer/multi-beam or girder carrying I-77 SB over S-12-56 in Chester County, South Carolina. It was built in 1978, so it is 47 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 24,450 vehicles a day, roughly 18% of them trucks, projected to reach 46,944 by 2043. The structure is 196 ft (59.7 m) long and 44 ft wide.
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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-77 SB over S-12-56 built?
It was built in 1978, making it 47 years old in 2025.
What condition is I-77 SB over S-12-56 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 March 2024.
How much traffic does I-77 SB over S-12-56 carry?
About 24,450 vehicles per day (2023 count), of which roughly 18% are trucks.
How long is I-77 SB over S-12-56?
The structure is 196 ft (59.7 m) long with a longest span of 110 ft (33.5 m) and a deck 44 ft wide.
Who owns I-77 SB over S-12-56?
It is owned by the State Highway Agency.