I-77 SB over I-20 & Ramp Off I-20
GoodRichland County, South Carolina · 8 MI NE of Columbia · Structure no. 000000000007932
- Built
- 1985
- 40 years old, rebuilt 2018
- Condition
- Good
- inspected January 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 356 ft
- 5 main spans
- Daily traffic
- 47,200
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-77 SB over I-20 & Ramp Off I-20 is a steel continuous stringer/multi-beam or girder carrying I-77 SB over I-20 & Ramp Off I-20 in Richland County, South Carolina. It was built in 1985 and reconstructed in 2018, so it is 40 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 47,200 vehicles a day, roughly 16% of them trucks, projected to reach 58,528 by 2043. The structure is 356 ft (108.5 m) long and 69 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-77 SB over I-20 & Ramp Off I-20 built?
It was built in 1985, making it 40 years old in 2025. It was reconstructed in 2018.
What condition is I-77 SB over I-20 & Ramp Off I-20 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 January 2024.
How much traffic does I-77 SB over I-20 & Ramp Off I-20 carry?
About 47,200 vehicles per day (2023 count), of which roughly 16% are trucks.
How long is I-77 SB over I-20 & Ramp Off I-20?
The structure is 356 ft (108.5 m) long with a longest span of 91 ft (27.7 m) and a deck 69 ft wide.
Who owns I-77 SB over I-20 & Ramp Off I-20?
It is owned by the State Highway Agency.