Las Positas RD over Arroyo Seco
FairAlameda County, California · 0.3 MI East of 1st ST · Structure no. 33C0382
- Built
- 1985
- 40 years old
- Condition
- Fair
- inspected November 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 60 ft
- 4 main spans
- Daily traffic
- 8,700
- 2009 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Las Positas RD over Arroyo Seco is a concrete continuous culvert carrying Las Positas RD over Arroyo Seco in Alameda County, California. It was built in 1985, so it is 40 years old, younger than the California average of 54.8 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 8,700 vehicles a day, roughly 5% of them trucks, projected to reach 2,809 by 2045. The structure is 60 ft (18.3 m) long and 60 ft wide. If it were closed, the detour would be 1.9 mi (3 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 |
|---|---|---|
| Channel and channel protection | 9 Excellent | No problems noted. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Las Positas RD over Arroyo Seco built?
It was built in 1985, making it 40 years old in 2025.
What condition is Las Positas RD over Arroyo Seco 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 November 2023.
How much traffic does Las Positas RD over Arroyo Seco carry?
About 8,700 vehicles per day (2009 count), of which roughly 5% are trucks.
How long is Las Positas RD over Arroyo Seco?
The structure is 60 ft (18.3 m) long with a longest span of 14 ft (4.4 m) and a deck 60 ft wide.
Who owns Las Positas RD over Arroyo Seco?
It is owned by the City or Municipal Highway Agency.