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<br />Reservoir Intake Canal gage on an annual basis since 1947. Only <br /> <br />M <br />00 on one occasion, January 1952, has any water been measured at the <br />~-:> <br />~ gage during the months of December, January and February. The <br /> <br />,,,.:) <br /> <br />',:;' Engineer Advisors recommend that the Commission consider operating <br /> <br />Eastdale Reservoir No. 1 Intake Canal gage only during the March- <br /> <br />November period. The annual cost of operation of the gage for the <br /> <br />nine month period is about $100 less than for the entire year. The <br /> <br />savings to the CommisJion would be about $50 per year. <br /> <br />During the last three years the states have alternated in pre- <br /> <br />paring the engineering computation and have absorbed the cost in- <br /> <br />curred therein. It is recommended this procedure be continued. <br />c <br /> <br />ESTIMATED SAFE YIELD, COSTILLA RESERVOIR <br />SYSTEM 1974 IRRIGATION SEASON <br /> <br />The forecasted natural runoff of Costilla Creek at the Canyon <br /> <br />Mouth for the May-September period based on the April 1 snow water <br /> <br />content of the Culebra and Red River snow courses is 11,700 acre- <br /> <br />feet. The estimated storage in Costilla Reservoir on April 30, <br /> <br /> <br />1974 is 8,000 acre-feet. The estimated safe yield of the Costilla <br /> <br />Reservoir System at the Cerro heading for the 1974 irrigation, <br /> <br />season is 11,600 acre-feet. A safe yield of 16,000 acre-feet from <br /> <br />the reservoir system represents essentially a full supply. <br /> <br /> <br />~ <br /> <br />,~Q <br />~ <br />ew Mexico <br /> <br />Adv~sor for <br /> <br />" <br /> <br />- 3 - <br />