AgdaPkt 2010-02-01 clsd and regular

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7A - ATTACHMENT NO.3 Saltworks Proposal- Water Group Summary Report (22 January 2010) Page 24 for the regional water system exceeds the 265 mgd Interim Supply Limitation, then an "environmental enhancement surcharge" will be levied on those agencies that exceed their individual limitations. Similar to the IWSAP, BAWSCA members are also currently working on updating the Interim Supply Limitation allocations among the wholesale customers. Redwood City's individual supply guarantee from the Regional Water System is 10.93 mgd or 12,243 AFY. This guarantee did not change with adoption of the new Agreement. During the past 10 years, Redwood City has purchased more than its annual contractual supply from San Francisco, averaging approximately 693 AFY more than the supply guarantee between 1998 and 2007. Consistent with existing agreements, this is possible because other BAWSCA agencies have not used their full contractual supply. Water from the regional system is delivered to Redwood City via 13 metered connections to four SFPUC pipelines (called the Bay Division Pipelines) located in Redwood City. 3.3.2 Availability of SFPUC Supply for Saltworks Project The final determination of availability of Redwood City's potable supply from SFPUC for the Saltworks project will be made through an SB 610 Water Supply Assessment (WSA) that would be prepared for the project if it continues to move through the City's review process. The Saltworks project meets SB 610 criteria, and is considered a "project" as defined by California Water Code Section 10912, so a WSA would need to be conducted. In advance of the WSA, following are some observations on the availability of the City's existing potable supply for the project. The primary City policy document regarding availability of potable supply is the 2005 Urban Water Management Plan (UWMP). The 2005 UWMP identifies the SFPUC supply as the City's sole source of potable water, and also identifies the City's assumptions about how this water is expected to be allocated through the year 2030. One of the first questions asked in preparing a WSA is: "does the UWMP account for the proposed project's demand?" The answer to that question for Saltworks is "no." The 2005 UWMP assumes that the City's population will grow by about 13 percent from 2005 to 2030, from 83,090 to 93,330. This represents an increase of about 11,240 people. The Saltworks project alone represents potential population growth of 30,000 people. In addition, the 2005 UWMP assumes that growth in multi-family housing units will occur primarily within the Downtown planning area and in mixed use developments along transit corridors (e.g., EI Camino Real and Woodside Road). It does not identify high-density housing in the Saltworks location. The total number of new multi-family housing units projected for the 2030 horizon year is 4,496. The total number of new housing units anticipated at the Saltworks project is 12,000. Thus, the Saltworks project represents both population and housing growth not anticipated by the 2005 UWMP. While the 2005 UWMP does not account for the Saltworks project, it does project that the water needed from the SFPUC in 2030 would be 11,724 AFY or 519 AFY less than the supply assurance from the SFPUC. It is possible that this water may be available to a project like the Saltworks, but further analysis would be required. Using the City's Attachment Q water demand methodology, as presented in Section 2.3 and summarized in Table 1, the Saltworks project would need about 1,815 AFY of 17