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<br />" '. , ,- <br /> <br /> <br />.J I <br /> <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 /> <br /> <br /> <br />Figure 1. Historic and Future Water Use <br /> <br />16,000 <br /> <br />---------- <br />".000 ;..-" - - -- <br />-- <br /> <br />",ODD <br /> <br />" 10,000 <br />~ <br />~ <br />i ',000 <br />~ ""'0"'" F,,",," <br />~ ',000 <br /> <br />',000 <br /> <br />2,000 <br /> <br />0 <br />1970 1975 "" 19" 1990 19" 2000 2005 2OJO 20" 2020 2025 <br /> <br /> <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 /> <br /> <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 /> <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 /> <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 /> <br />Page50f8 <br />