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SOURCE <br />ACRE FEET/YEAR <br />State Water Project future average delivery <br />60,900 <br />Lake Del Valle future average yield <br />9,300 <br />Byron Bethany Irrigation District (BBID) <br />2,000 <br />Subtotal Zone 7 Sustainable Supply <br />72,200 <br />Safe groundwater yield from Main Basin <br />13,400 <br />Recycled Water <br />1, 900 <br />Subtotal: Non -Zone 7 supply <br />15,300 <br />TOTAL SUSTAINABLE WATER SUPPLY <br />87,500 <br />Zone 7 Water Agency Water Resources Engineering <br />100 North Canyons Parkway, Livermore, Ca 94551 <br />Tel. (925) 454 -5000 Fax (925) 454 -5727 <br />ORIGINATING SECTION: Water Resources Engineering <br />CONTACT: David Lunn <br />AGENDA DATE: May 16, 2007 ITEM NO. <br />SUBJECT: ANNUAL REVIEW OF THE SUSTAINABLE WATER SUPPLY <br />SUMMARY: <br />Each year Zone 7 staff prepares a water supply assessment of the Livermore- Amador Valley <br />sustainable water supply. Every 5 years Zone 7 includes this information in an update of the <br />Urban Water Management Plan. This report updates the August 2006 information provided to <br />the Tri- Valley Water Retailers Group. The current sustainable supply is 87,500 acre-feet. <br />Operational studies used in this assessment demonstrate that Zone 7 has sufficient water supply <br />to meet future demands for every hydrologic year on record. Operational studies include <br />assessment of the recent final DWR allocation study published in June 2006. The capital <br />facilities needed to convey, recharge, store, treat, pump and deliver this water have been <br />identified and are incorporated into Zone 7's current 10 -Year Capital Improvement Plan (CIP). <br />Zone 7 has sufficient sustainable supplies to provide for all potable (treated) water demands <br />through build -out of the cities current general plans and for all currently contracted non potable <br />(untreated) water demands. <br />Following are the components of the Livermore- Amador Valley's sustainable water supply: <br />1 <br />