Alton Parkway over Barranca Channel
GoodOrange County, California · 0.3 MI N/W Jamboree RD · Structure no. 55C0474
- Built
- 1975
- 50 years old
- Condition
- Good
- inspected August 2024
- Type
- Culvert
- Concrete
- Length
- 21 ft
- 2 main spans
- Daily traffic
- 15,900
- 2018 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Alton Parkway over Barranca Channel is a concrete culvert carrying Alton Parkway over Barranca Channel in Orange County, California. It was built in 1975, so it is 50 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 15,900 vehicles a day, roughly 7% of them trucks, projected to reach 21,755 by 2041. The structure is 21 ft (6.4 m) long and 101 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Alton Parkway over Barranca Channel built?
It was built in 1975, making it 50 years old in 2025.
What condition is Alton Parkway over Barranca Channel 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 August 2024.
How much traffic does Alton Parkway over Barranca Channel carry?
About 15,900 vehicles per day (2018 count), of which roughly 7% are trucks.
How long is Alton Parkway over Barranca Channel?
The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 101 ft wide.
Who owns Alton Parkway over Barranca Channel?
It is owned by the City or Municipal Highway Agency.