S-46-31 over U.S. 21
PoorYork County, South Carolina · 4.6 MI SE Rock Hill · Structure no. 000000000004680
- Built
- 1965
- 60 years old
- Condition
- Poor
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 226 ft
- 4 main spans
- Daily traffic
- 4,000
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S-46-31 over U.S. 21 is a prestressed concrete stringer/multi-beam or girder carrying S-46-31 over U.S. 21 in York 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 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 4,000 vehicles a day, roughly 5% of them trucks, projected to reach 5,320 by 2043. The structure is 226 ft (68.9 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S-46-31 over U.S. 21 built?
It was built in 1965, making it 60 years old in 2025.
What condition is S-46-31 over U.S. 21 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 May 2024.
How much traffic does S-46-31 over U.S. 21 carry?
About 4,000 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is S-46-31 over U.S. 21?
The structure is 226 ft (68.9 m) long with a longest span of 60 ft (18.3 m) and a deck 32 ft wide.
Who owns S-46-31 over U.S. 21?
It is owned by the State Highway Agency.