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Last modified
7/29/2009 10:28:41 PM
Creation date
10/12/2006 12:35:26 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8210.140.20.A
Description
Colorado River - Colo River Basin - Orgs/Entities - CRBSF - California - Colo River Board of Calif
State
CA
Date
8/13/2002
Author
Gerald Zimmerman
Title
Executive Directors Monthly Report to the Colorado River Board of California
Water Supply Pro - Doc Type
Report/Study
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<br />. <br /> <br />. <br /> <br />In total, for these three submittals, there are 357 applicants requesting a total of 5, I 48 acre-feet of <br />Project water annually. Of this amount, 508 acre-feet is being used annually by current users and <br />4,640 acre-feet annually is being reserved for future use. <br /> <br />PROTECTION OF EXISTING RIGHTS <br /> <br />Colorado River Water Reoort <br /> <br />As of August 1,2002, storage in the major Upper Basin reservoirs decreased by 940,000 acre-feet <br />and storage in the Lower Basin reservoirs decreased by 237,000 acre-feet during July. Total System active <br />storage as of August 1>1 was 39.437 million acre-feet (mat) or 66 percent of capacity, which is 8.250 maf <br />less than one year ago. <br /> <br />July releases from Hoover, Davis, and Parker Dams averaged 16,380, 16,300 and 13,210 cubic feet <br />per second (cfs), respectively. Planned releases from those three dams for the month of August 2002 are <br />15,000, 13,400, and 10,500 cfs, respectively. The June releases represent those needed to meet <br />downstream water requirements including those caused by reduced operation of Senator Wash reservoir. <br /> <br />As of August 1 ", the observed April through July 2002 unregulated inflow into Lake Powell was <br />1.115 maf, which is 14 percent of the 30-year average for the period 1961-1990. The final August 1,2002, <br />projected umegulated inflow into Lake Powell for the 2001-02 water year was 2.973 maf, or 25 percent <br />of the 30-year average. <br /> <br />. The Lower Division States' estimated consumptive use of Colorado River water for calendar year <br />2002, as estimated by Board staff, totals 8.584 maf and is projected as follows: Arizona, 3.082 maf; <br />California, 5.200 maf; and Nevada, 0.302 maf. Unmeasured return flow crcdits of 0.247 mafwould reduce <br />the total amount of projected consumptive use to 8.337 maf. Arizona's increased consumptive use of <br />mainstream water is attributed to the following: (I) a drought within most ofthe State has led to increased <br />use of Colorado River water by the Salt River Project; (2) banking of mainstream water on behalf of the <br />State of Nevada in the Arizona Water Bank; and (3) an increase in actual consumptive use by CAP <br />subcontractors in the Phoenix and Tucson metropolitan regions. <br /> <br />For calendar year 2002, it is estimated the Central Arizona Project (CAP) will divert 1.635 maf, <br />of which 0.358 mafis to be credited to the Arizona Water Bank, and The Metropolitan Water District of <br />Southern California (MWD) will divert 1.251 maf. <br /> <br />The preliminary August 2002 end-of-year California agricultural consumptive use of Colorado <br />River water under the first three priorities and the sixth priority of the 1931 California Seven Party <br />Agreement is 3.922 maf. This estimate is based on the collective use through June 2002 by the Palo Verde <br />Irrigation District, the Yuma Project Reservation Division (YPRD), the Imperial Irrigation District, and <br />the Coachella Valley Water District. Figure I, found at the end of this report, depicts the historic projected <br />end-of-year agricultural use for the year. <br /> <br />2 <br />
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