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<br /> <br />. <br /> <br />CRAPrER III <br /> <br />BASES FOR ANALYSES <br /> <br />The fol1owing chapters present four widely differing plans which <br />might be undertaken to provide part or all of the projected water needs <br />in the Basalt Project area. To avoid repetitious discussions in chap- <br />ters covering the various plans, items generally applicable to all plans <br />or more than one plan are discussed in this chapter and are the basis <br />for all plans where appropriate. <br /> <br />Purposes Served <br /> <br />. <br /> <br />Potential uses for project water include municipal and domestic use, <br />irrigation, outdoor residential use, and recreation. Irrigation water is <br />considered as that provided to tracts of irrigable land larger than 5 <br />acres in size. Water for outdoor residential use is considered as that <br />provided for watering of lawns, gardens, and small tracts of 5 acres or <br />less without regard to the irrigability of the land. The water for both <br />irrigation and outdoor residential use would be untreated, delivered in an <br />open ditch system, and available only during the irrigation season. The <br />assumption is made that some water would be gradually shifted from irriga- <br />tion to outdoor residential use as population of the project area increases'. <br />Municipal and domestic water provided by the project would require treat- <br />ment by the water users. <br /> <br />Water Supply <br /> <br />Available supplies <br /> <br />Potential sources of water for the Basalt Project include storage re- <br />leases from Ruedi Reservoir on the Fryingpan River, direct flows of <br />Fryingpan River in excess of the Ruedi Reservoir capacity that would be <br />bypassed through or spilled from the reservoir, and undeveloped flows of <br />Cattle, Mesa, and West Coulter Creeks. Because of the rolling topography <br />of the project service area, it is anticipated that irrigation return flows <br />would not be available for use. <br /> <br />Ruedi Reservoir Storage Water <br /> <br />. <br /> <br />No firm determination has yet been made of the amount of storage <br />water available in Ruedi Reservoir for new use in western Colorado. An <br />estimate of the available storage was made, however, on the basis of a <br />simulated operation of the reservoir over the 1952-56 period, which is <br />considered a critical dry period. The studies were made in accordance <br /> <br />15 <br />