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shows that in early- to mid-September of 2002, 185 ac-ft of stored water would have <br />been required to meet the District demands, goals and provide a storage reserve until <br />the following spring. Note that Figures 2 and 3 indicate the quantity of raw water storage <br />being utilized; the storage supplies shown must be in-place prior to the time when they <br />are indicated to be utilized. <br />Raw Water Storage Sites. The foregoing discussions provide a quantification of <br />the net required raw water storage capacity for the described operational uses. For the <br />purposes of the District and possible additional snowmaking utilization, the storage can <br />be developed in 1 or more sites. Typically the cost of developing multiple small sites is <br />greater than the cost of developing one larger site due to the economies of scale: <br />multiple sites require more infrastructure for water delivery into and from the reservoir, <br />and typically a larger site is more efficient in terms of lower evaporation and seepage <br />losses as compared to multiple sites. Often, however, multiple smaller sites can be <br />developed with lesser impact on the surrounding environment as compared to one larger <br />site. <br />Raw Water Storage Losses. The above quantification of raw water storage <br />requirements does not include consideration of evaporation and seepage losses that <br />reservoir storage water supplies would undergo. Additional storage capacity would be <br />required to store water that would be lost during the period between filling and utilization. <br />District Storage for Catastrophic Events. The analysis indicates that the <br />amount of water needed to meet District demand, for three weeks during a catastrophic <br />event that renders both pipelines unusable, ranges from 105 ac-ft at the 5,900 EQRs <br />development level (Total Existing Municipal Demand With Base Village and <br />Redevelopment) to 120 ac-ft at the 6,800 EQRs development level (Total District Built- <br />Out With Reserve). The required catastrophic storage is based on an average daily use <br />per EQR of 275 gallons, and assumes curtailment of outdoor uses within the District <br />during the emergency period. It should be noted that this magnitude of storage, <br />reserved for a catastrophic event, could sustain the District usage for a period of more <br />than 3 weeks if additional conservation measures, in addition to the elimination of <br />Page 25 <br />