OHLA awarded two contracts in California with a combined value of over $180 million

October 30, 2023

Aerial rendering of completed Montebello Boulevard Grade Separation.

To improve safety and promote sustainability in local and surrounding Los Angeles communities, OHLA will carry out contracts to construct the Montebello Corridor Grade Separation and the Alondra Park Multi-Benefit Stormwater Capture projects.

OHLA, through its U.S. subsidiary OHLA USA, received a contract valued at $127 million from the San Gabriel Valley Council of Governments to improve traffic flow and vehicular and rail safety in Montebello, California.

The contract calls for the construction of a bridge at the Union Pacific Railroad crossings at Montebello Boulevard and Olympic Boulevard, creating a roadway underpass at both locations. 

The project will eliminate potential train collisions with vehicles since motorists will travel below grade while trains traverse the track unimpeded.  The effort will also significantly reduce traffic congestion and emissions and enhance safety by upgrading signal systems and adding pedestrian crossings.

Located eight miles east of downtown Los Angeles, the grade separation project requires the demolition and excavation of substructure elements followed by the construction of a steel girder bridge with concrete fascia and earth retaining structures.  Also included is the installation of CIDH piles, abutments, and columns. To advance the project, the team will grade and prepare the site within the Union Pacific Railroad right of way, construct support of excavation systems, build roadway structural sections, and construct a temporary track detour to allow trains to remain operational through the construction zone. Extensive paving activities and concrete work for curbing, gutters, and sidewalks are also part of the contract.

In Lawndale, California, OHLA is executing a $56 million contract for Los Angeles County to perform the Alondra Park Multi-Benefit Stormwater Capture project. The purpose of the contract is to remove contaminants from stormwater runoff. OHLA will also revitalize the existing park – located above the capture reservoir – with new soccer and multi-purpose turf fields, in addition to two rehabilitated baseball fields.

The major scopes of work include extensive support of excavation to remove 265,000 cubic yards of soil, placement of precast concrete for the underground storage chambers, installation of stormwater pipes, valves, and pretreatment filtration equipment, and the construction of diversion, junction, and manhole structures.

While the stormwater capture construction takes place 30 feet beneath the park, the team will upgrade recreational spaces and ball fields and plant native and drought-tolerant vegetation and trees, bioswales, and permeable pavements.


OHLA USA has been active in the western United States since 2013.  Since that time, the company has performed numerous contracts for clients such as Caltrans, Orange County Transportation Authority, the City of Los Angeles, LA Metro, the City of San Diego, and the San Diego County Water Authority.  Currently, the company is performing ten projects in the West Region including the I-5 North County Enhancements Project in Santa Clarita, the I-405 Improvement Project in Orange County, and Hamner Avenue Bridge in Norco, as well as the SR 71 project in Pomona.

U.S., a strategic market for OHLA

OHLA opened for business in the U.S. market in 2006 and operates in New York, California, Maryland, Massachusetts, Illinois, and Florida. The company is involved in major contracts such as the Purple Line Light Rail, in Maryland, for a combined amount of $2,300 million, a design-build services contract in Brooklyn, NY for accessibility upgrades at the historic Borough Hall Station, improvements to renew five stations on the Flushing Line in Queens, NY, and the South Corridor Bus Rapid Transit project in Florida.

The company is ranked 13th in the top 20 contractors by sector (Transportation) and 17th in the top 50 Domestic Heavy Contractors, according to Engineering News-Record.