Interstate 680 over South Main Street
GoodContra Costa County, California · 04-CC-680-13.08-WLC · Structure no. 28 0167
- Built
- 1959
- 66 years old, rebuilt 1990
- Condition
- Good
- inspected July 2022
- Type
- Box Beam or Girders - Multiple
- Concrete
- Length
- 141 ft
- 1 main span
- Daily traffic
- 195,300
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 680 over South Main Street is a concrete box beam or girders - multiple carrying Interstate 680 over South Main Street in Contra Costa County, California. It was built in 1959 and reconstructed in 1990, so it is 66 years old, older than the California average of 54.8 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 195,300 vehicles a day, roughly 6% of them trucks, projected to reach 254,000 by 2041. The structure is 141 ft (43 m) long and 184 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Interstate 680 over South Main Street built?
It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1990.
What condition is Interstate 680 over South Main Street 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 July 2022.
How much traffic does Interstate 680 over South Main Street carry?
About 195,300 vehicles per day (2020 count), of which roughly 6% are trucks.
How long is Interstate 680 over South Main Street?
The structure is 141 ft (43 m) long with a longest span of 89 ft (27 m) and a deck 184 ft wide.
Who owns Interstate 680 over South Main Street?
It is owned by the State Highway Agency.