First Street over Arroyo Seco
FairAlameda County, California · 600 NW Las Positas Road · Structure no. 33C0424
- Built
- 1994
- 31 years old
- Condition
- Fair
- inspected October 2021
- Type
- Culvert
- Concrete Continuous
- Length
- 59 ft
- 4 main spans
- Daily traffic
- 19,950
- 2009 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
First Street over Arroyo Seco is a concrete continuous culvert carrying First Street over Arroyo Seco in Alameda County, California. It was built in 1994, so it is 31 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 19,950 vehicles a day, roughly 5% of them trucks, projected to reach 13,527 by 2043. The structure is 59 ft (18 m) long and 151 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 | 8 Very Good | 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 First Street over Arroyo Seco built?
It was built in 1994, making it 31 years old in 2025.
What condition is First Street 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 October 2021.
How much traffic does First Street over Arroyo Seco carry?
About 19,950 vehicles per day (2009 count), of which roughly 5% are trucks.
How long is First Street over Arroyo Seco?
The structure is 59 ft (18 m) long with a longest span of 14 ft (4.3 m) and a deck 151 ft wide.
Who owns First Street over Arroyo Seco?
It is owned by the City or Municipal Highway Agency.