State Route 91 over Carbon Ditch
GoodOrange County, California · 12-ORA-091-4.28-ANA · Structure no. 55 0196
- Built
- 1959
- 66 years old
- Condition
- Good
- inspected August 2023
- Type
- Culvert
- Concrete
- Length
- 50 ft
- 3 main spans
- Daily traffic
- 265,000
- 2014 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 91 over Carbon Ditch is a concrete culvert carrying State Route 91 over Carbon Ditch 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 265,000 vehicles a day, roughly 6% of them trucks, projected to reach 295,000 by 2040. The structure is 50 ft (15.2 m) long and 110 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 State Route 91 over Carbon Ditch built?
It was built in 1959, making it 66 years old in 2025.
What condition is State Route 91 over Carbon Ditch 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 State Route 91 over Carbon Ditch carry?
About 265,000 vehicles per day (2014 count), of which roughly 6% are trucks.
How long is State Route 91 over Carbon Ditch?
The structure is 50 ft (15.2 m) long with a longest span of 16 ft (4.9 m) and a deck 110 ft wide.
Who owns State Route 91 over Carbon Ditch?
It is owned by the State Highway Agency.