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<br />OJ <br /> <br />MWD <br />METROPOUTAN WATER DISTRJCTOF SOUTHERN CAUFORNIA <br /> <br />Date: <br /> <br />April 28, 2003 <br /> <br />To: <br /> <br />Board of Directors <br /> <br />From: <br /> <br />Ronald R. Gastelum, Chief Executive Officer <br /> <br />Subject: <br /> <br />Water Supply Reliability <br /> <br />San Diego County Water Authority officials have questioned Metropolitan's analyses of water <br />supply reliability. During the beginning of the year, Metropolitan staff and member agencies <br />evaluated water supply conditions based on conservative estimates of local rainfall, State Water <br />Project and Colorado River water allocations. The fIrst quarter operating record for 2003 has <br />instead found conditions that are more favorable than expected. For example, the State Water <br />Project allocation has increased from 20% in December 2002 to 70% in April 2003. <br /> <br />Amidst the multitude of analyses and expert opinions, the operating realities are as follows: <br /> <br />1. Consumptive demands for Metropolitan deliveries will be fully met. Consumptive <br />demands are expected to be 2.3 million acre-feet in 2003 based on current trends. <br /> <br />2. Local Groundwater basins are being replenished: As of April 21, Metropolitan has <br />resumed direct replenishment deliveries of SWP water to agencies in its service area. <br /> <br />3. Maximum year-end withdrawal from surface reservoirs will be less than 200,000 <br />acre-feet, of which 160,000 acre-feet is due to the outage of Lake Mathew for the <br />construction of a new inlet/outlet tower and maintenance of the CRA. Metropolitan <br />has storage in Diamond Valley Lake, Lake Mathews, Lake Skinner, Castaic Lake, and <br />Lake Perris. <br /> <br />4. Central Valley Storage Accounts are being replenished: Metropolitan has chosen to <br />exercise most of its Sacramento Valley water transfer options. Over 230,000 acre-feet of <br />water will be stored in the San Luis reservoir and groundwater banking programs in San <br />Joaquin Valley. <br /> <br />5. Full emergency storage has been maintained. Metropolitan has supplies available in <br />storage to meet emergency needs during catastrophic events. <br /> <br />6. Conservation and local resources are working. Despite the worst droughts that occurred <br />in southern California and the Colorado River system in the last 100 years, demands on <br />Metropolitan have remained below the record level of2.5 million acre-feet per year. <br /> <br />7. Aggressive conservation programs in our service area will provide more operational <br />flexibility. The planned conservation programs this summer are intended to lay the <br />