US 1 over I-77
PoorRichland County, South Carolina · 1.0 MI N of I-20 · Structure no. 000000000007023
- Built
- 1977
- 48 years old
- Condition
- Poor
- inspected February 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 285 ft
- 4 main spans
- Daily traffic
- 31,000
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 1 over I-77 is a steel stringer/multi-beam or girder carrying US 1 over I-77 in Richland County, South Carolina. It was built in 1977, so it is 48 years old, younger 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 31,000 vehicles a day, roughly 2% of them trucks, projected to reach 48,670 by 2043. The structure is 285 ft (87 m) long and 90 ft wide.
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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 1 over I-77 built?
It was built in 1977, making it 48 years old in 2025.
What condition is US 1 over I-77 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 February 2024.
How much traffic does US 1 over I-77 carry?
About 31,000 vehicles per day (2023 count), of which roughly 2% are trucks.
How long is US 1 over I-77?
The structure is 285 ft (87 m) long with a longest span of 100 ft (30.5 m) and a deck 90 ft wide.
Who owns US 1 over I-77?
It is owned by the State Highway Agency.