S-12-497 over I-77
FairChester County, South Carolina · 1.5 MI S Richburg · Structure no. 000000000007223
- Built
- 1979
- 46 years old
- Condition
- Fair
- inspected February 2025
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 310 ft
- 4 main spans
- Daily traffic
- 600
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S-12-497 over I-77 is a steel continuous stringer/multi-beam or girder carrying S-12-497 over I-77 in Chester County, South Carolina. It was built in 1979, so it is 46 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 5 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 600 vehicles a day, roughly 5% of them trucks, projected to reach 768 by 2043. The structure is 310 ft (94.5 m) long and 37 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 | 7 Good | Some minor problems. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S-12-497 over I-77 built?
It was built in 1979, making it 46 years old in 2025.
What condition is S-12-497 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 February 2025.
How much traffic does S-12-497 over I-77 carry?
About 600 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is S-12-497 over I-77?
The structure is 310 ft (94.5 m) long with a longest span of 100 ft (30.5 m) and a deck 37 ft wide.
Who owns S-12-497 over I-77?
It is owned by the State Highway Agency.