Interstate 405 over Westminster Channel
GoodOrange County, California · 12-ORA-405-17.80-WTM · Structure no. 55 0462
- Built
- 1965
- 60 years old
- Condition
- Good
- inspected September 2023
- Type
- Culvert
- Concrete
- Length
- 25 ft
- 2 main spans
- Daily traffic
- 256,000
- 2014 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 405 over Westminster Channel is a concrete culvert carrying Interstate 405 over Westminster Channel in Orange County, California. It was built in 1965, so it is 60 years old, older 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 256,000 vehicles a day, roughly 4% of them trucks, projected to reach 343,000 by 2040. The structure is 25 ft (7.6 m) long and 151 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 Interstate 405 over Westminster Channel built?
It was built in 1965, making it 60 years old in 2025.
What condition is Interstate 405 over Westminster 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 September 2023.
How much traffic does Interstate 405 over Westminster Channel carry?
About 256,000 vehicles per day (2014 count), of which roughly 4% are trucks.
How long is Interstate 405 over Westminster Channel?
The structure is 25 ft (7.6 m) long with a longest span of 13 ft (4 m) and a deck 151 ft wide.
Who owns Interstate 405 over Westminster Channel?
It is owned by the State Highway Agency.