S-412/MARE Bay RD over Trib to Willow Swp
FairColleton County, South Carolina · 16.5 MI NW Waltb · Structure no. 000000000004496
- Built
- 1965
- 60 years old
- Condition
- Fair
- inspected January 2025
- Type
- Slab
- Concrete
- Length
- 30 ft
- 2 main spans
- Daily traffic
- 125
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S-412/MARE Bay RD over Trib to Willow Swp is a concrete slab carrying S-412/MARE Bay RD over Trib to Willow Swp in Colleton County, South Carolina. It was built in 1965, so it is 60 years old, older 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 125 vehicles a day, roughly 5% of them trucks, projected to reach 160 by 2043. The structure is 30 ft (9.1 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| 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-412/MARE Bay RD over Trib to Willow Swp built?
It was built in 1965, making it 60 years old in 2025.
What condition is S-412/MARE Bay RD over Trib to Willow Swp 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 January 2025.
How much traffic does S-412/MARE Bay RD over Trib to Willow Swp carry?
About 125 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is S-412/MARE Bay RD over Trib to Willow Swp?
The structure is 30 ft (9.1 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.
Who owns S-412/MARE Bay RD over Trib to Willow Swp?
It is owned by the State Highway Agency.