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<br />'. <br /> <br />. <br /> <br />. <br /> <br />., <br /> <br />2.985 maf; California, 5.039 maf; and Nevada, 0.294 maf. Estimated additional unmeasured return <br />flow credits of 0.239 mafwould reduce the total amount to 8.079 maf. For calendar year 2001, it <br />is estimated the Central Arizona Project (CAP) will divert 1.618 maf, of which 0.315 maf is to be <br />credited to the Arizona Water Bank, and that The Metropolitan Water District of Southern California <br />(MWD) will divert 1.238 maf. <br /> <br />The preliminary April I estimate of200] end-of-yearCalifornia agricultural consumptive use <br />of Colorado River water under the first three priorities and the sixth priority of the 1931 California <br />Seven Party Agreement is 3.742 maf. This estimate is based on the collective use through March <br />2001 by the Palo Verde Irrigation District (PVID), the Yuma Project Reservation Division (YPRD), <br />the Imperial Irrigation District (110), and the Coachella Valley Water District (CVWD). Figure I, <br />found at the end of this report, depicts the historic projected end-of-year agricultural use for the year. <br /> <br />Colorado Ri ver Operations <br /> <br />Colorado River System Consumptive Uses and Losses Report <br /> <br />For your information, I can report that on March 30, 2001, Reclamation released, for review <br />and comment, a draft report entitled Colorado River System Consumptive Uses and Losses Report <br />199/-1995. Reclamation has requested that all comments be made to its Denver office by <br />May 15,200 I. A brief review of the Report shows that the average unmeasured return flows appear <br />to be too high for Arizona (167,620 AF) and too low for California (59,040 AF). <br /> <br />Consumptive uses from the Lower Basin mainstem in the same period 1991-1995, as shown <br />in the Summary Table on Page iv of the report, averaged 4.849 million acre-feet per year (maf/yr) <br />in California, 1.911 maflyr in Arizona and 0.202 maf/yr in Nevada for a total of6.962 maf/yr. The <br />consumptive uses in the Lower Basin states calculated by the Board during the same period averaged <br />\7.180 maf/yr, not adjusted for estimated unmeasured return flows. The difference of these two <br />average consumptive uses is about 0.218 maf/yr, which is very close to the report's total of average <br />unmeasured return flows of 0.226 maf/yr in Arizona and California. <br /> <br />According to the report. during the period 1991-1995, Lower Basin mains tern reservoir <br />evaporation averaged 1.091 maflyr, and the Upper Basin mainstem reservoir evaporation averaged <br />0.549 maf/yr. Other reservoir evaporation in the Upper Basin averaged 203,000 acre-feet per year. <br />Other reservoir evaporation in Arizona was listed as averaging 0.203 maf/yr. Since the report <br />includes tributaries in Arizona in the tables, it is assumed that this reservoir evaporation was from <br />Lake Pleasant reservoir and other reservoirs on tributaries such as the Salt, Verde, and Gila Rivers. <br /> <br />, . The report points out that phreatophyte use caused by agriculture in the Upper Basin was not <br />lIlcluded. The old virgin flow calculations, made prior to construction of Glen Canyon Dam, <br />included use by phreatophytes caused by application of agricultural water. <br /> <br />1nfernational Boundary and Water Commission - Nomination <br /> <br />The Board staff has received notice that President Bush intends to nominate Carlos Ramirez <br />as the U.S. Commissioner to the International Boundary and Water Commission (IBWC). <br /> <br />2 <br />