I-77 over Roberts Branch
FairRichland County, South Carolina · 9.0 MI North-Columbia · Structure no. 000000000007404
- Built
- 1980
- 45 years old
- Condition
- Fair
- inspected February 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 21 ft
- 2 main spans
- Daily traffic
- 72,700
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-77 over Roberts Branch is a concrete continuous culvert carrying I-77 over Roberts Branch in Richland County, South Carolina. It was built in 1980, so it is 45 years old, younger 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 72,700 vehicles a day, roughly 14% of them trucks, projected to reach 90,148 by 2043. The structure is 21 ft (6.4 m) long and 150 ft wide. If it were closed, the detour would be 1.9 mi (3 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-77 over Roberts Branch built?
It was built in 1980, making it 45 years old in 2025.
What condition is I-77 over Roberts Branch 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 February 2024.
How much traffic does I-77 over Roberts Branch carry?
About 72,700 vehicles per day (2023 count), of which roughly 14% are trucks.
How long is I-77 over Roberts Branch?
The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 150 ft wide.
Who owns I-77 over Roberts Branch?
It is owned by the State Highway Agency.