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<br />:........:.:'....'..:..:.:.'....':;:!i::......;;.......:.:. <br />'I!lll!!i ' ...8? <br />.:.~~!...,~~:~::~;~..;~... <br /> <br />. . '. . '. . <br /> <br />7A <br />Page 1 <br /> <br /> <br />TOth&~~r1P~~"*t3~"~'I~~ <br /> <br />May 18, 2009 <br /> <br />SUBJECT <br />Informational Update - San Francisco Public Utilities Commission (SFPUC) - Hetch <br />Hetchy Water System Improvement Program (WSIP) - Bay Division Pipeline Reliability <br />Upgrade Project - Bay Division Pipeline No. 5 - Peninsula Reaches. <br /> <br />RECOMMENDATION <br />No action is required at this time. This staff report is an information only item and <br />accompanies a PowerPoint presentation by the SFPUC project team. <br /> <br />BACKGROUND <br />The SFPUC is a department within the City and County of San Francisco that provides <br />water, wastewater and municipal power to San Francisco and is the third largest <br />municipal utility within California. SFPUC provides water to 2.5 million people <br />throughout the Bay Area. One third of this service is provided to residential, commercial <br />and industrial customers within the City and County of San Francisco. Two thirds of <br />SFPUC's service is provided to customers in San Mateo, Santa Clara, and Alameda <br />counties. The SFPUC delivers about 265 million gallons per day to all water customers <br />within its system as of 2008 <br /> <br />Eighty..five percent of the water delivered by the SFPUC is derived from snowpack <br />runoff from the Sierra Nevada, via the Hetch Hetchy watershed located in Yosemite <br />National Park. About 15 percent of SFPUC's water is sourced from watersheds in the <br />East Bay and the San Francisco Peninsula. The Calaveras Reservoir in Santa Clara <br />County, the San Antonio Reservoir in Alameda County, and the Pilarcitos, Crystal <br />Springs, and San Andreas reservoirs in San Mateo County hold a combination of local <br />runoff and stored Hetch Hetch water. <br /> <br />SFPUC is currently undertaking a Water Supply Improvement Program (WSIP) to <br />ensure their agency's ability to provide water to its customers. The WSIP includes at <br />least 85 capital improvement projects involving all elements of SFPUC's water delivery <br />system with priority given to issues of seismic stability and mitigation of the impact <br />these projects create. <br /> <br />The Bay Division Pipeline Reliability Upgrade Project - Bay Division Pipeline No. 5 is <br />one of the largest WSIP projects. The proposed project will construct a fifth Bay <br />Division Pipeline (BDPL 5) along the alignment of the existing BDPLs 1 and 2, and <br />create a tunnel under the San Francisco Bay between Newark and Menlo Park. This <br />new pipeline is expected to provide a seismically resistant system to ensure that water <br />service continues to customers after a seismic event. The pipeline will be 5 feet in <br />diameter on the Peninsula. The construction of BDPL 5 will also allow for easier repair <br />and maintenance of existing pipelines <br />