,
<br /> Because none of the 24 project components considered could individually meet future water
<br /> demands,it was necessary to combine various project components into"portfolios of
<br /> projects" to provide a long-term water supply solution.Each of the seven potential project
<br /> portfolios included phased implementation of selected projects to meet the City's increasing
<br /> water demands.Project phasing was based on meeting projected dry year water demands at
<br /> least five years before the demand occurs.
<br /> Figure 1 below shows the portfolio that was determined to best meet the evaluation criteria.
<br /> The evaluation shows that the first project that should be constructed to meet near term
<br /> water demand is the Prairie Waters Project.The Prairie Waters Project will put the City
<br /> ahead of the demand curve for several years and provide"drought hardening" of the
<br /> existing system.
<br /> Platteville Project
<br /> Platteville Exchange i,+,
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<br /> 140.0 .' Eagle River Hdwter Pioj.lb � #,,
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<br /> d Demand-175far, r 4 ,' tp 1�f 4 ,, 46u :.,, ".
<br /> 1 00.0 _4:1, "�""�'glpcd Demand—160 ,e.,, .P y w ua sB a ra uja lm ai Na �s�f;tm Iemand=140tp1 f D� q i .1
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<br /> FIGURE 1.AURORA WATER DEMAND AND YIELD COMPARISON(MWH,2004)
<br /> To meet the demands of its existing customers in dry years, and to meet the increasing
<br /> demands on the system in the future, the goal of the PWP is to supply 10,000 acre-feet of
<br /> water per year (ac-ft/yr) by 2009-2010 and 15,000 ac-ft/yr by 2012-2013. Aurora Water will
<br /> accomplish this goal using reusable effluent from its existing portfolio of decreed reusable
<br /> water rights,supplemented by lawn irrigation return flows and junior water rights.
<br /> 4
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