Alcosta Boulevard over Interstate 680
GoodContra Costa County, California · 04-CC-680-R0.01-SRMN · Structure no. 28 0210
- Built
- 1965
- 60 years old
- Condition
- Good
- inspected July 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 240 ft
- 4 main spans
- Daily traffic
- 23,975
- 1998 count
- Owner
- State
- State Highway Agency
About this bridge
Alcosta Boulevard over Interstate 680 is a concrete continuous box beam or girders - multiple carrying Alcosta Boulevard over Interstate 680 in Contra Costa County, California. It was built in 1965, so it is 60 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 23,975 vehicles a day, roughly 3% of them trucks, projected to reach 39,255 by 2044. The structure is 240 ft (73.2 m) long and 82 ft wide.
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 Alcosta Boulevard over Interstate 680 built?
It was built in 1965, making it 60 years old in 2025.
What condition is Alcosta Boulevard 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 2024.
How much traffic does Alcosta Boulevard over Interstate 680 carry?
About 23,975 vehicles per day (1998 count), of which roughly 3% are trucks.
How long is Alcosta Boulevard over Interstate 680?
The structure is 240 ft (73.2 m) long with a longest span of 75 ft (22.9 m) and a deck 82 ft wide.
Who owns Alcosta Boulevard over Interstate 680?
It is owned by the State Highway Agency.