S-21-763 over Allen Canal
FairFlorence County, South Carolina · 5.1MI SE Olanta · Structure no. 000000000004537
- Built
- 1965
- 60 years old, rebuilt 1999
- Condition
- Fair
- inspected April 2024
- Type
- Slab
- Concrete
- Length
- 30 ft
- 2 main spans
- Daily traffic
- 250
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S-21-763 over Allen Canal is a concrete slab carrying S-21-763 over Allen Canal in Florence County, South Carolina. It was built in 1965 and reconstructed in 1999, 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 250 vehicles a day, roughly 5% of them trucks, projected to reach 320 by 2043. The structure is 30 ft (9.1 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S-21-763 over Allen Canal built?
It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1999.
What condition is S-21-763 over Allen Canal 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 April 2024.
How much traffic does S-21-763 over Allen Canal carry?
About 250 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is S-21-763 over Allen Canal?
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-21-763 over Allen Canal?
It is owned by the State Highway Agency.