S-21-1355 over I-20
FairFlorence County, South Carolina · 1MI W I-95 & I-20 Int · Structure no. 000000000006493
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected March 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 268 ft
- 4 main spans
- Daily traffic
- 750
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S-21-1355 over I-20 is a steel stringer/multi-beam or girder carrying S-21-1355 over I-20 in Florence County, South Carolina. It was built in 1974, so it is 51 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 750 vehicles a day, roughly 5% of them trucks, projected to reach 960 by 2043. The structure is 268 ft (81.7 m) long and 37 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S-21-1355 over I-20 built?
It was built in 1974, making it 51 years old in 2025.
What condition is S-21-1355 over I-20 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 March 2023.
How much traffic does S-21-1355 over I-20 carry?
About 750 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is S-21-1355 over I-20?
The structure is 268 ft (81.7 m) long with a longest span of 97 ft (29.6 m) and a deck 37 ft wide.
Who owns S-21-1355 over I-20?
It is owned by the State Highway Agency.