Alton Parkway EB over State Route 133 & Ramp
FairOrange County, California · 12-ORA-133-8.74-IRVN · Structure no. 55 0653R
- Built
- 1987
- 38 years old
- Condition
- Fair
- inspected November 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 321 ft
- 3 main spans
- Daily traffic
- 10,500
- 2017 count
- Owner
- State
- State Highway Agency
About this bridge
Alton Parkway EB over State Route 133 & Ramp is a prestressed concrete continuous box beam or girders - multiple carrying Alton Parkway EB over State Route 133 & Ramp in Orange County, California. It was built in 1987, so it is 38 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 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 10,500 vehicles a day, roughly 3% of them trucks, projected to reach 11,371 by 2042. The structure is 321 ft (97.8 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Alton Parkway EB over State Route 133 & Ramp built?
It was built in 1987, making it 38 years old in 2025.
What condition is Alton Parkway EB over State Route 133 & Ramp 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 November 2024.
How much traffic does Alton Parkway EB over State Route 133 & Ramp carry?
About 10,500 vehicles per day (2017 count), of which roughly 3% are trucks.
How long is Alton Parkway EB over State Route 133 & Ramp?
The structure is 321 ft (97.8 m) long with a longest span of 126 ft (38.4 m) and a deck 45 ft wide.
Who owns Alton Parkway EB over State Route 133 & Ramp?
It is owned by the State Highway Agency.