Project Details

Primary Contractor
California Department of Transportation
$130 million
July 2019
Start Date
July 2023
Completion Date

I-5 Oso Parkway

Flatiron is widening a nearly three-mile segment of Interstate 5, a major artery for Southern California’s Orange County. Motorists along this busy stretch near Mission Viejo will have the benefit of an additional general-purpose lane, as well as a second HOV lane in both directions.

Crews are also constructing seven bridges in three locations, as well as 22 retaining walls (multiple types including permanent soil nails, vertical ground anchors, and mechanically stabilized earth).

Flatiron has also developed a system for work to proceed safely and efficiently near train tracks in active service.