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<br /> <br />...,~...,....""""'~ .._" T-fu e.__ )Av~.i.~tW"- ,-"" "'~~~""'~'''';'''c''''_ ',"',''''''.,, <br /> <br />LEEDS,HILLAND JEWEIT, INC. <br /> <br />consumptive use in the Upper Basin, would require that the average <br /> <br />natural undepleted flow of Colorado River at Lee Ferry be at least <br /> <br />17.5 million acre feet per year. The true natural supply has been far <br /> <br />less than this quantity. Hence, if the premise of the Special Master <br /> <br />be valid, a very severe shortage of water will be imposed on the Upper <br /> <br />Basin. <br /> <br />The undep1eted or virgin flow of Colorado River at Lee Ferry, <br /> <br />as given on page 118 of the report of the Special Master, is quoted <br /> <br />below: <br /> <br />TABLE A <br />AVERAGE ANNUAL VIRGIN FLOW FOR SELECTED PERIODS <br /> <br />Period <br /> <br />Acre Feet per Year <br /> <br />1909-1956 <br />1914-1956 <br />1922-1956 <br />1930 -1956 <br /> <br />15,211,000 <br />14,920,000 <br />14,008,000 <br />13,085,000 <br /> <br />Measurements of the actual flow of Colorado River at Lee Ferry <br /> <br />were not commenced until about the beginning of the Water Year 1921-22, <br /> <br />so that authentic records of the historical flow at Lee Ferry are avail- <br /> <br />able only for that water year and subsequent years. Estimates of the <br /> <br />magnitude of the actual flow prior to 1922 could be grossly in error; <br /> <br />hence the estimates of the average virgin flow for the period 1909 -1956 <br /> <br />and the period 1914-1956 are questionable. <br /> <br />-4- <br />