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./ . 002268 EXECUTIVE DIRECTOR'S MONTHLY REPORT TO THE COLORADO RIVER BOARD OF CALIFORNIA January 12, 1999 RECEIV~t'. JAM t 9 '999 CdoradO Water (;oIIS8I'I3tion Board ADMINISTRATION Board Membershio Included in your Board folder, for your information, is a copy of a letter from Mr. Mark Watton to Governor Wilson submitting his resignation as San Diego County Water Authority's representative on the Colorado River Board, effective upon the appointment of a successor. PROTECTION OF EXISTING RIGHTS Colorado River Water Reoort During November 1998, storage in the major Upper Basin reservoirs decreased by 186,000 acre-feet and storage in the Lower Basin reservoirs decreased by 158,000 acre-feet. Total System active storage at the end of November was 55.261 million acre-feet (mat) or 93 percent of capacity, which is 0.208 mafmore than one year ago. December releases from Hoover, Davis, and Parker Dams averaged 19,890, 20,690 and 16,590 cubic feet per second (cfs), respectively. Planned releases from those three dams for the month of January are 19,000, 16,720 and 13,920 cfs, respectively. The January releases represent those needed to meet downstream water requirements and flood control space building.. The preliminary January forecast of April through July 1999 unregulated inflow into Lake Powell is 6.200 maf, which is 80 percent of the 30-year average for the period 1961-1990. The preliminary January forecast of the unregulated inflow into Lake Powell for the 1998-99 water year is 10,681 maf, or 9] percent of the 30-year average. The Lower Division states' preliminary measured consumptive use of Colorado River water for calendar year 1998, as estimated by Board staff on January 7110, totals 7.802 maf and is projected as follows: Arizona, 2.554 maf; Califomia, 5.003 maf; and, Nevada, 0.245 maf. Estimated additional unmeasured return flow credits of 0.251 mafwould reduce the total amount to 7.551 maf. The preliminary measured diversions for calendar year 1998, by the Central Arizona Project (CAP) is 1.223 maf and The Metropolitan Water District of Southern Califomia (MWD), is 1,072 mar The preliminary January 7110 estimate of 1998 calendar year Califomia agricultural consumptive use of Colorado River water under the first three priorities of the 1931 California Seven Party Agreement is 3.872 maf. This estimate is based on the collective use through December 1998