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<br />~ <br />~ <br />co <br />( ~'. <br />c' <br />c <br /> <br />.".' <br /> <br />-1- <br /> <br />INTRODUCTION <br /> <br />Purpose and Scope <br /> <br />This report describes a general study of the water rights <br />impact of seven salinity control alternatives developed for <br />the Salinity Investigation of the Glenwood-Dotsero springs <br />unit by the URS project team. Information describing five of <br />the alternatives proposed by the team was derived from a <br />Project Working Paper, dated December 1, 1980. Information on <br />the two additional alternatives was drawn from discussions <br />with URSpersonnel involved in other portions of the Project. <br />Data on the water rights of the Colorado River and its <br />tributaries were obtained from the Office of the State <br />Engineer, including the 1978 Tabulation of Decreed Water <br />Rights and discussions with various State officials. <br /> <br />To analyze the seven al ternati ves, it was necessary to make <br />certain quantitative assumptions relative to the configura- <br />tion and operation of various components comprising the <br />alternatives. These assumptions are described in the next <br />section and generally produce a conservative estimate of <br />water uses. That is, the estimated depletions to the Colorado <br />River system are more likely to be high than low. This <br />general examination has made it possible to rank the seven <br />alternatives in order of the magnitude of their impact in <br />terms of the volume of water removed from the stream, the <br />number and quantity of water rights that might be impacted, <br />and the costs of providing replacement water. Throughout this <br />report, the terms "consumptive use" and "depletion" are used <br />interchangeably. <br /> <br />c1> Leonard Rice Consulting Water Engineers.lnc <br />