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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />1-5 <br /> <br />The Siting Area is that area in which faci lities such as new reser- <br />voirs may be sited and the rehabilitation, expansion, or change in use of <br />existing reservoirs may be accomplished to serve the needs of the Study Area. <br /> <br />The physical boundaries of the Siting Area are defined as the area <br />inclusive of the St. Vrain Basin, the Little Thompson River Basin and Carter <br />Lake to the north, the Boulder Creek Basin on the south, the Continental <br />Divide on the west, and the South Platte River on the east. <br /> <br />E. Study Process <br /> <br />As previously indicated, the St. Vrain Study was intended initially <br />to be a three-step process beginning with the Basin description and identi- <br />fication of water-related needs in Step 1, the formulation and preliminary <br />evaluation of alternatives (primari Iy structural) in Step 2, and a reconnais- <br />sance-level evaluation of several selected alternatives in Step 3. Emphasis <br />was to be placed on identification, evaluation, and selection of sites for <br />water resources development, primari Iy storage. However, within three months <br />following initiation of of Step 1 work, it was evident that the Study requi red <br />a broader analysis to incorporate consideration of a spectrum of water manage- <br />ment purposes, and with much greater emphasis on non-structural measures and <br />more thorough evaluation of social and environmental effects of alternative <br />water resource management plans. Therefore, the range of identified manage- <br />ment measures was expanded to meet those purposes and, subsequent Iy, Step 2 <br />activities were redefined and Step 3 of the original Plan of Study was el im- <br />inated. <br /> <br />I n conduct i ng Step 1 and Step 2 stud i es, spec if i c tasks were com- <br />pleted as defined in the Plan of Study. Each of these specific tasks along <br />with their respective purposes is summarized in Table 1-1. The fol lowing dis- <br />cussion summarizes the scope of the major tasks and results of Step 1 and <br />Step 2. <br /> <br />Step 1 - Identification of St. Vrain Basin Characteristics and Needs <br /> <br /> <br />As indicated in Table 1-1, six speci fic tasks were completed for <br /> <br />Step 1. <br /> <br />Step 1, .complete.d in August 1984, includes: (1) an inventory of <br />the physical, SOCioeconomiC, environmental, hydrologic, and institutional <br />characteristics of the Basin; (2) water and power demand projections through <br />the year 2020; and (3) prel iminary identification of the water management pur- <br />poses to be addressed by the Study. <br /> <br />Several water management purposes were identified in Step 1. These <br />range from regulation of trans-Basin diversions and irrigation suppl ies to <br />enhancement of fish and wi Idlife and protection and improvement of water qual- <br />ity, and include flood damage reduction, hydroelectric power generation, and <br />municipal/industrial water supply. <br />