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<br />. <br /> <br />PART VII--SUPPORTING DATA <br /> <br />. <br /> <br />The su~porting data for this report are on file in the <br />Regional Office, Bureau of Reclamation, Denver, Colorado. On <br />file are consideraPle quantities of data concerning the hydrologic <br />and engineering investigations. In particular, is a detailed <br />presentation entitled "Geological Investigations" inclua.ed as <br />exhibit A in the data compiled for making the design ana. cost <br />estimate of the Idylwilde Dam and Reservoir. This presentation <br />is dated January 1965 and includes a description and the location <br />of fill materials for the dam. <br /> <br />Included with the supporting data are the details of sediment <br />surveys which were made on l8 of the existing irrigation reservoirs. <br />All of the reservoirs surveyed are located in the plains section of <br />the basin, and are owned and o:perated by private irrigation companies. <br />The purpose of these surveys was to provide a basis for estimating <br />the amount of water which coula. be conserved by transfe:t'ring the <br />storage to Idylwilde Reservoir. Conservation of water would have <br />been effected through reduction of losses from evaporation, <br />phreatophytic consumption, and operational wastes. <br /> <br />. <br /> <br />.. <br /> <br />. <br /> <br />29 <br /> <br />