S-12-778 over Unnamed Stream
PoorChester County, South Carolina · 4.0 MI NE Chester · Structure no. 000000000007547
- Built
- 1982
- 43 years old
- Condition
- Poor
- inspected December 2024
- Type
- Slab
- Concrete
- Length
- 45 ft
- 3 main spans
- Daily traffic
- 600
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S-12-778 over Unnamed Stream is a concrete slab carrying S-12-778 over Unnamed Stream in Chester County, South Carolina. It was built in 1982, so it is 43 years old, younger than the South Carolina average of 48 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 600 vehicles a day, roughly 5% of them trucks, projected to reach 768 by 2043. The structure is 45 ft (13.7 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S-12-778 over Unnamed Stream built?
It was built in 1982, making it 43 years old in 2025.
What condition is S-12-778 over Unnamed Stream in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.
How much traffic does S-12-778 over Unnamed Stream carry?
About 600 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is S-12-778 over Unnamed Stream?
The structure is 45 ft (13.7 m) long with a longest span of 15 ft (4.6 m) and a deck 33 ft wide.
Who owns S-12-778 over Unnamed Stream?
It is owned by the State Highway Agency.