Knott Avenue over Carbon Creek Channel
GoodOrange County, California · 0.3 Mi. N/O Ball Road · Structure no. 55C0271
- Built
- 1959
- 66 years old
- Condition
- Good
- inspected August 2023
- Type
- Slab
- Prestressed Concrete
- Length
- 36 ft
- 1 main span
- Daily traffic
- 24,400
- 2019 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Knott Avenue over Carbon Creek Channel is a prestressed concrete slab carrying Knott Avenue over Carbon Creek Channel in Orange County, California. It was built in 1959, so it is 66 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 24,400 vehicles a day, roughly 3% of them trucks, projected to reach 59,260 by 2041. The structure is 36 ft (11 m) long and 77 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 |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| 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 Knott Avenue over Carbon Creek Channel built?
It was built in 1959, making it 66 years old in 2025.
What condition is Knott Avenue over Carbon Creek 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 2023.
How much traffic does Knott Avenue over Carbon Creek Channel carry?
About 24,400 vehicles per day (2019 count), of which roughly 3% are trucks.
How long is Knott Avenue over Carbon Creek Channel?
The structure is 36 ft (11 m) long with a longest span of 34 ft (10.4 m) and a deck 77 ft wide.
Who owns Knott Avenue over Carbon Creek Channel?
It is owned by the City or Municipal Highway Agency.