Portola Pkwy over Aliso Creek
FairOrange County, California · 100 W/O El Toro Road · Structure no. 55C0611
- Built
- 1991
- 34 years old
- Condition
- Fair
- inspected September 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 104 ft
- 1 main span
- Daily traffic
- 12,000
- 2017 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Portola Pkwy over Aliso Creek is a prestressed concrete box beam or girders - multiple carrying Portola Pkwy over Aliso Creek in Orange County, California. It was built in 1991, so it is 34 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 12,000 vehicles a day, roughly 1% of them trucks, projected to reach 14,155 by 2044. The structure is 104 ft (31.8 m) long and 142 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Portola Pkwy over Aliso Creek built?
It was built in 1991, making it 34 years old in 2025.
What condition is Portola Pkwy over Aliso Creek 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 Portola Pkwy over Aliso Creek carry?
About 12,000 vehicles per day (2017 count), of which roughly 1% are trucks.
How long is Portola Pkwy over Aliso Creek?
The structure is 104 ft (31.8 m) long with a longest span of 100 ft (30.5 m) and a deck 142 ft wide.
Who owns Portola Pkwy over Aliso Creek?
It is owned by the City or Municipal Highway Agency.