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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.
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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 2017. Aurora Water will
<br />accomplish this goal using reusable effluent from its existing portEolio of decreed reusable
<br />water rights, supplemented by lawn irrigation return flows and junior water rights.
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