Macarthur Blvd over Interstate 405
FairOrange County, California · 12-ORA-405-7.80-IRVN · Structure no. 55 0440L
- Built
- 1968
- 57 years old
- Condition
- Fair
- inspected February 2025
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 333 ft
- 4 main spans
- Daily traffic
- 12,000
- 2014 count
- Owner
- State
- State Highway Agency
About this bridge
Macarthur Blvd over Interstate 405 is a concrete continuous box beam or girders - multiple carrying Macarthur Blvd over Interstate 405 in Orange County, California. It was built in 1968, so it is 57 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 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 3% of them trucks, projected to reach 14,490 by 2045. The structure is 333 ft (101.5 m) long and 72 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Macarthur Blvd over Interstate 405 built?
It was built in 1968, making it 57 years old in 2025.
What condition is Macarthur Blvd over Interstate 405 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 February 2025.
How much traffic does Macarthur Blvd over Interstate 405 carry?
About 12,000 vehicles per day (2014 count), of which roughly 3% are trucks.
How long is Macarthur Blvd over Interstate 405?
The structure is 333 ft (101.5 m) long with a longest span of 112 ft (34.1 m) and a deck 72 ft wide.
Who owns Macarthur Blvd over Interstate 405?
It is owned by the State Highway Agency.