Sycamore Valley RD over Interstate 680
GoodContra Costa County, California · 04-CC-680-R6.76-DNVL · Structure no. 28 0195
- Built
- 1964
- 61 years old, rebuilt 1989
- Condition
- Good
- inspected July 2022
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 282 ft
- 4 main spans
- Daily traffic
- 3,000
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
Sycamore Valley RD over Interstate 680 is a concrete continuous box beam or girders - multiple carrying Sycamore Valley RD over Interstate 680 in Contra Costa County, California. It was built in 1964 and reconstructed in 1989, so it is 61 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 3,000 vehicles a day, roughly 1% of them trucks, projected to reach 6,824 by 2040. The structure is 282 ft (86 m) long and 108 ft wide. If it were closed, the detour would be 1.9 mi (3 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 Sycamore Valley RD over Interstate 680 built?
It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1989.
What condition is Sycamore Valley RD over Interstate 680 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 Sycamore Valley RD over Interstate 680 carry?
About 3,000 vehicles per day (2020 count), of which roughly 1% are trucks.
How long is Sycamore Valley RD over Interstate 680?
The structure is 282 ft (86 m) long with a longest span of 75 ft (22.9 m) and a deck 108 ft wide.
Who owns Sycamore Valley RD over Interstate 680?
It is owned by the State Highway Agency.