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<br />D ~- f';i' r::'" <br />, 'j", -', , " <br />.. , ~... .... '._ v <br /> <br />, <br />" <br /> <br />. <br /> <br />rates for the Upper Uncompahgre area (Figure .1. Figure ~) <br />beginning in 1981. <br /> <br />Documentation for the development of irrigated agriculture <br />conscumptive use as provided by the Denver Office (USBR) is <br />included in Section H. <br /> <br />Review of documentation shows that consumptive use estimates <br />for the 1952-1990 period were developed as part of five <br />efforts: <br /> <br />1952 - 1974: CRSS <br /> <br />1975 - 1985: 1971-1975 CU&L report <br />1976-1980 CU&L report <br />1981-1985 CU&L report <br /> <br />1986 - 1990: <br /> <br />methods as outlined in Methods Manual and <br />Plan of Studv for the Colorado River <br />Svstem. ConsumDtive Uses and Losses <br />ReDort. 1985-90 <br /> <br />The drop in Upper Uncompahgre consumptive use rates <br />observed in 1981 may be due all or in part to the change <br />in climate station data used in computations from <br />Montrose and Ouray to Ridgway in 1981. <br /> <br />. <br /> <br />I will get back with you to arrange the logistics of <br />addressing comments, changes, or other recommendations <br />stemming from reviewing these materials. (If you have any <br />questions, or need additional information, please contact me.) <br /> <br />Thank You, <br /> <br />J~ <br /> <br />John Ozga <br />U.S. Bureau of Reclamation <br />Grand Junction Projects Office <br />(303)-248-0640 <br /> <br />~ page(s) of enclosure <br />follow <br /> <br />. <br />