State Route 91 over Santa Ana River
FairOrange County, California · 12-ORA-091-8.57-ANA · Structure no. 55 0106
- Built
- 1954
- 71 years old, rebuilt 1994
- Condition
- Fair
- inspected September 2024
- Type
- Girder and Floorbeam System
- Concrete Continuous
- Length
- 869 ft
- 18 main spans
- Daily traffic
- 213,000
- 2016 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 91 over Santa Ana River is a concrete continuous girder and floorbeam system carrying State Route 91 over Santa Ana River in Orange County, California. It was built in 1954 and reconstructed in 1994, so it is 71 years old, older 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 6 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 213,000 vehicles a day, roughly 6% of them trucks, projected to reach 302,000 by 2042. The structure is 869 ft (265 m) long and 156 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 91 over Santa Ana River built?
It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1994.
What condition is State Route 91 over Santa Ana River 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 September 2024.
How much traffic does State Route 91 over Santa Ana River carry?
About 213,000 vehicles per day (2016 count), of which roughly 6% are trucks.
How long is State Route 91 over Santa Ana River?
The structure is 869 ft (265 m) long with a longest span of 50 ft (15.2 m) and a deck 156 ft wide.
Who owns State Route 91 over Santa Ana River?
It is owned by the State Highway Agency.