Alta Road over Oniel Canyon
GoodSan Diego County, California · 1.6MI N/O Otay Mesa Road · Structure no. 57C0745
- Built
- 1990
- 35 years old
- Condition
- Good
- inspected November 2022
- Type
- Culvert
- Concrete Continuous
- Length
- 36 ft
- 3 main spans
- Daily traffic
- 634
- 2016 count
- Owner
- County
- County Highway Agency
About this bridge
Alta Road over Oniel Canyon is a concrete continuous culvert carrying Alta Road over Oniel Canyon in San Diego County, California. It was built in 1990, so it is 35 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 634 vehicles a day, roughly 2% of them trucks, projected to reach 768 by 2040. The structure is 36 ft (11 m) long. If it were closed, the detour would be 11.8 mi (19 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 |
|---|---|---|
| Channel and channel protection | 9 Excellent | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Alta Road over Oniel Canyon built?
It was built in 1990, making it 35 years old in 2025.
What condition is Alta Road over Oniel Canyon 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 November 2022.
How much traffic does Alta Road over Oniel Canyon carry?
About 634 vehicles per day (2016 count), of which roughly 2% are trucks.
How long is Alta Road over Oniel Canyon?
The structure is 36 ft (11 m) long with a longest span of 12 ft (3.6 m).
Who owns Alta Road over Oniel Canyon?
It is owned by the County Highway Agency.