Ramp on I-77 SB over US 21
GoodYork County, South Carolina · 4 Miles NE of Rock Hill · Structure no. 000000000009858
- Built
- 2004
- 21 years old
- Condition
- Good
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 233 ft
- 3 main spans
- Daily traffic
- 4,400
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Ramp on I-77 SB over US 21 is a steel stringer/multi-beam or girder carrying Ramp on I-77 SB over US 21 in York County, South Carolina. It was built in 2004, so it is 21 years old, younger than the South Carolina average of 48 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 4,400 vehicles a day, roughly 7% of them trucks, projected to reach 9,284 by 2043. The structure is 233 ft (71 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Ramp on I-77 SB over US 21 built?
It was built in 2004, making it 21 years old in 2025.
What condition is Ramp on I-77 SB over US 21 in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.
How much traffic does Ramp on I-77 SB over US 21 carry?
About 4,400 vehicles per day (2023 count), of which roughly 7% are trucks.
How long is Ramp on I-77 SB over US 21?
The structure is 233 ft (71 m) long with a longest span of 138 ft (42 m) and a deck 31 ft wide.
Who owns Ramp on I-77 SB over US 21?
It is owned by the State Highway Agency.