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coLORwo ? • ixeNiTn+r*rroF Stotewide Water $upply Initiotive NArcnzni. ttESOURc:ES Attachment 2 Approach to Preliminary Gap Analysis and Alternatives March 2004 Preliminary Gap Analysis Following is a discussion of the steps that will be conducted in developing the preliminary gap analysis: 1. The initial estimate of gap will calculated by subtracting current demand from future demand. 2. The short-term projects and processes will be applied to the initial gap estimate. Any remaining gap between supply and demand will have options and alternatives developed. • 3. Mid-term and long-term projects will be considered for meeting the remaining gap. 4. The supply availability analysis at the basin level will be used a"check" for meeting the remaining gap. The supply availability will include unappropriated water available under various hydrologic conditions after short-term projects have been subtracted from unappropriated water. Alternatives Analysis Following is a discussion of the steps that will be conducted in developing alternatives for each basin. The definition of an alternative is a combination of projects or options to meet each individual basin's needs?An example of this analysis will be presented at the March CWCB Board Meeting) The steps that will be undertaken in developing alternatives for each basin are: 1. Remove short-term projects and processes that have been identified by proponents within the basin. As described above, determine the net gap by subtracting current demands from 2030 demands and then adding supply from the near-term projects and processes. 2. Aggregate "like" mid-term and long-term projects together. Examples of aggregating like projects include grouping all reuse projects together or all • reservoir enlargement projects together into "categories." These categories of projects will be distributed into geographic areas within the basin as appropriate. cm DRAFT S_1Me0ngs\CWCB BoartlWtemativ?ApDmacA3.doc