S-12-56 over Mc/Millan CR
GoodChester County, South Carolina · 4.6 MI W Richburg · Structure no. 000000000008427
- Built
- 1991
- 34 years old
- Condition
- Good
- inspected December 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 60 ft
- 3 main spans
- Daily traffic
- 700
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S-12-56 over Mc/Millan CR is a prestressed concrete box beam or girders - multiple carrying S-12-56 over Mc/Millan CR in Chester County, South Carolina. It was built in 1991, so it is 34 years old, younger than the South Carolina average of 48 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 700 vehicles a day, roughly 15% of them trucks, projected to reach 1,022 by 2043. The structure is 60 ft (18.3 m) long and 38 ft wide. If it were closed, the detour would be 5 mi (8 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S-12-56 over Mc/Millan CR built?
It was built in 1991, making it 34 years old in 2025.
What condition is S-12-56 over Mc/Millan CR in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2024.
How much traffic does S-12-56 over Mc/Millan CR carry?
About 700 vehicles per day (2023 count), of which roughly 15% are trucks.
How long is S-12-56 over Mc/Millan CR?
The structure is 60 ft (18.3 m) long with a longest span of 30 ft (9.1 m) and a deck 38 ft wide.
Who owns S-12-56 over Mc/Millan CR?
It is owned by the State Highway Agency.