Saturday, November 1, 2014

Construction Advisory: New Irvington Tunnel Project

Dear Neighbor:
We wanted to inform you of some very important construction activity affecting your neighborhood at the Irvington Portal site off Mission Boulveard.


Irvington Portal work starting November 2, 2014: As part of the process of preparing the tunnel to be brought into service, we will need to provide additional tunnel ventilation to our construction crews at the Irvington Portal site. The equipment will begin mobilizing in the area on November 2, 2014, and work should be complete in approximately one week. The ventilation equipment, which includes a fan and generator, will operate 24 hours a day. Cooling air is needed for crews who are lining the tunnel with a cement mortar to prepare it for being put into service. The sound barrier walls will keep the noise to a minimum and the contractor will install additional noise reduction measure.

Project Background: The New Irvington Tunnel Project is part of the $4.6 billion Water System Improvement Program (WSIP) to repair, replace, and upgrade our system’s aging pipelines, tunnels, and dams. The new 3.5 mile long tunnel will provide a seismically-designed connection between water supplies from the Sierra Nevada Mountains and the Alameda Watershed to Bay Area water distribution systems.  Final construction is expected to be complete in 2015.

Questions / Concerns? We greatly appreciate your patience. Please call our 24-Hour Answer Line at 866-973-1476 or email or if you have any questions. Follow us online at

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