Cannon Street over Unknown Ravine
FairOrange County, California · 1.0 MI S/O Nohl Ranch RD · Structure no. 55C0684
- Built
- 1993
- 32 years old
- Condition
- Fair
- inspected April 2023
- Type
- Box Beam or Girders - Single or Spread
- Concrete
- Length
- 178 ft
- 1 main span
- Daily traffic
- 18,900
- 2021 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Cannon Street over Unknown Ravine is a concrete box beam or girders - single or spread carrying Cannon Street over Unknown Ravine in Orange County, California. It was built in 1993, so it is 32 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 5 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 18,900 vehicles a day, roughly 3% of them trucks, projected to reach 33,415 by 2043. The structure is 178 ft (54.3 m) long and 96 ft wide. If it were closed, the detour would be 4.3 mi (7 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 |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Cannon Street over Unknown Ravine built?
It was built in 1993, making it 32 years old in 2025.
What condition is Cannon Street over Unknown Ravine 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 April 2023.
How much traffic does Cannon Street over Unknown Ravine carry?
About 18,900 vehicles per day (2021 count), of which roughly 3% are trucks.
How long is Cannon Street over Unknown Ravine?
The structure is 178 ft (54.3 m) long with a longest span of 175 ft (53.3 m) and a deck 96 ft wide.
Who owns Cannon Street over Unknown Ravine?
It is owned by the City or Municipal Highway Agency.