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<br /> 5.\t.-i <br /> The quantity of water received by Redwood City in prior years from existing Hetch Hetchy water <br /> supply entitlements is shown in Figure 1 (in AFIY). This figure is reproduced from the Redwood <br /> City UWMP, and includes projected future water use. <br /> Figure 1. Historic and FutL.e Water Use <br /> 16.000 <br /> 14,000 <br /> 12,000 <br /> .. 10,000 <br /> = <br /> ,. <br /> i <br /> i 8,000 <br /> ~ <br /> ! <br /> ~ 6,000 <br /> 4,000 <br /> 2,000 <br /> 0 <br /> 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 <br /> 5. GROUND WATER ANALYSIS <br /> Redwood City does not use groundwater. There are currently no plans to use groundwater in <br /> the future. <br /> 6. WATER SUPPLY SUFFICIENCY <br /> Determination: Redwood City does not have sufficient water supply to meet the projected water <br /> demands of new development projects. In fact, Redwood City is actively pursuing expansion of <br /> its water supply for existing customers. <br /> Redwood City's current water supply reliability is shown in Figure 2. This figure is derived from <br /> a technical memorandum, Water Supply Reliability dated August 15, 2002, by John Whitcomb, <br /> PhD (Attachment 'D'). When the SFPUC declares a water shortage, Redwood City will be <br /> required to make relatively large water use cutbacks as specified in the Interim Water Shortage <br /> Allocation Plan adopted by the SFPUC and all suburban purchasers (including Redwood City) <br /> in 2001, pursuant to section 7.03(a) of the Master Water Sales Contract. <br /> Figure 2 illustrates five water cutback scenarios: <br /> 1. Most of the time, the SFPUC will not declare a water shortage. <br /> 2. Sometimes the SFPUC will declare a 5% system-wide shortage resulting in a 12.2% <br /> Redwood City cutback-the probability of this declaration was not identified by SFPUC. <br /> 3. With a probability of 7.6%, the SFPUC will declare a 10% system-wide shortage <br /> resulting in a 17.5% Redwood City cutback (about one year in 12). <br /> 4. If the SFPUC declares a 15% system-wide shortage, Redwood City will get a 23.3% <br /> cutback-the probability of this declaration was not identified by SFPUC. <br /> 5. With a probability of 2.5%, the SFPUC will declare a 20% system-wide shortage <br /> resulting in a 28.4% Redwood City cutback (about one year in 40). <br /> Page 5 of 8 <br />