US 21 over RR NS
FairYork County, South Carolina · 8.2 MI S of Rock Hill · Structure no. 000000000002101
- Built
- 1954
- 71 years old, rebuilt 1965
- Condition
- Fair
- inspected June 2023
- Type
- Tee Beam
- Concrete
- Length
- 120 ft
- 3 main spans
- Daily traffic
- 9,500
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 21 over RR NS is a concrete tee beam carrying US 21 over RR NS in York County, South Carolina. It was built in 1954 and reconstructed in 1965, so it is 71 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 5 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 9,500 vehicles a day, roughly 7% of them trucks, projected to reach 12,635 by 2043. The structure is 120 ft (36.6 m) long and 73 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, 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 US 21 over RR NS built?
It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1965.
What condition is US 21 over RR NS 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 June 2023.
How much traffic does US 21 over RR NS carry?
About 9,500 vehicles per day (2023 count), of which roughly 7% are trucks.
How long is US 21 over RR NS?
The structure is 120 ft (36.6 m) long with a longest span of 40 ft (12.2 m) and a deck 73 ft wide.
Who owns US 21 over RR NS?
It is owned by the State Highway Agency.