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Today, the Alameda Corridor-East Construction Authority (ACE) board plans to award a $172.6 million contract to Walsh Construction Co. to construct a railroad trench in San Gabriel, Calif.

The five-year project calls for lowering a 1.4-mile section of Union Pacific Railroad track in a trench running through the city of San Gabriel. In addition, the work involves building a 1.4-mile-long, 65-foot-wide, 30-foot-deep railroad trench to accommodate UP and Amtrak trains, as well as constructing street bridges at four grade crossings. The project will help ease local traffic congestion and enable more containers in the region to be moved by train rather than by trucks, according to ACE.

The trench is the largest project in ACE’s ongoing program involving grade separations and traffic safety improvements in the San Gabriel Valley. Nearly 60 percent of the region’s container traffic travels along ACE’s corridor to destinations nationwide.