Ghirardelli Associates News

Segment 3, Doolittle Subway U-Wall and Tunnel

BART, using Flatiron/Parsons Design Build, is building a connecting light rail track from the Coliseum Station to the Oakland Airport, with an elevated station at the OAC, incorporating at grade, elevated and tunnel track.  

Segment #3 pictured is the Subway Tunnel Segment, which extends from the SE side of Outbound Airport Drive, curving West under the Caltrans ROW, a 4 lane Doolittle Ave, to the NW side of Doolittle.

Construction methods being used are drill and place Secant Piles for tunnel walls, CIP tunnel roof beams at existing grade, then excavate tunnel segment.

Caption:  Foundation pour for Bent 2 of the San Mateo Ave Undercrossing, which is one of the three bridges being built concurrently. 

San Bruno Grade Separation Program, $90 Million
Ghirardelli Associates, Inc. is providing construction inspection services for this Peninsula Corridor Joint Powers Board project.  Project scope includes raising the railroad in a retained embankment and lowering roadway crossings.  The San Bruno Caltrain station will be relocated onto an elevated structure.

On March 8, 2012, the Ghirardelli Associates, Inc.'s team participated in the LA Metro Groundbreaking Ceremony for the Sound Wall No. 8 New Construction Project.