Portola Ave over I-580 Arroyo Las Positas
GoodAlameda County, California · 04-ALA-580-13.22 · Structure no. 33 0722
- Built
- 2011
- 14 years old
- Condition
- Good
- inspected February 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 663 ft
- 5 main spans
- Daily traffic
- 138,200
- 2011 count
- Owner
- State
- State Highway Agency
About this bridge
Portola Ave over I-580 Arroyo Las Positas is a concrete continuous box beam or girders - multiple carrying Portola Ave over I-580 Arroyo Las Positas in Alameda County, California. It was built in 2011, so it is 14 years old, younger 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 138,200 vehicles a day, roughly 10% of them trucks, projected to reach 345,634 by 2042. The structure is 663 ft (202 m) long and 43 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. |
| 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 Portola Ave over I-580 Arroyo Las Positas built?
It was built in 2011, making it 14 years old in 2025.
What condition is Portola Ave over I-580 Arroyo Las Positas 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 February 2024.
How much traffic does Portola Ave over I-580 Arroyo Las Positas carry?
About 138,200 vehicles per day (2011 count), of which roughly 10% are trucks.
How long is Portola Ave over I-580 Arroyo Las Positas?
The structure is 663 ft (202 m) long with a longest span of 153 ft (46.5 m) and a deck 43 ft wide.
Who owns Portola Ave over I-580 Arroyo Las Positas?
It is owned by the State Highway Agency.