I-20 over Broad River
FairRichland County, South Carolina · 5 MI N of Columbia · Structure no. 000000000004638
- Built
- 1965
- 60 years old, rebuilt 1991
- Condition
- Fair
- inspected January 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 1,387 ft
- 19 main spans
- Daily traffic
- 123,700
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-20 over Broad River is a prestressed concrete stringer/multi-beam or girder carrying I-20 over Broad River in Richland County, South Carolina. It was built in 1965 and reconstructed in 1991, so it is 60 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 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 123,700 vehicles a day, roughly 9% of them trucks, projected to reach 153,388 by 2043. The structure is 1,387 ft (422.8 m) long and 107 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-20 over Broad River built?
It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1991.
What condition is I-20 over Broad River 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 January 2024.
How much traffic does I-20 over Broad River carry?
About 123,700 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is I-20 over Broad River?
The structure is 1,387 ft (422.8 m) long with a longest span of 73 ft (22.3 m) and a deck 107 ft wide.
Who owns I-20 over Broad River?
It is owned by the State Highway Agency.