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<br />.\ <br /> <br />. <br /> <br />N <br />(./) <br />C.J' <br />CD <br /> <br />able to predict the total amount of the release from Lake Mead <br />which can be made during the following year while maintaining <br />a reasonable reservoir operation. This is very important at <br />the present time because of the proximity to the start of the <br />period for filling Colorado River Storage Project Reservoirs. <br /> <br />Last June the Hoover operating agents and allottees of Hoover <br />energy met with us to establish a schedule of generation which <br />would conform to the required water release schedule. We are <br />required to pattern our releases from Hoover, Davis, and parker <br />darns in a manner such that the minimum requirements of the <br />downstream irrigation demands are satisfied. Power producing <br />facilities at the dams are integrated with these irrigation <br />demands to take advantage of the falling water when it becomes <br />available. <br /> <br />At the integration meeting held last June ,,' inflow predictions and <br />reservoir storage conditions were such that we determined to <br />release from storage during the following 12 months only suffi- <br />cient water to meet the downstream demands. It was estimated <br />that these releases would provide generation of only 84 percent <br />of contract firm energy at Hoover Powerplant this operating <br />year which ends May 31, 1962. <br /> <br />As the inflow during the April-July period last year amounted <br />to only about the minimum of that forecast and the downstream <br />demands of irrigation remained to be met, the resulting water <br />levels in Lake Mead were correspondingly low and accordingly <br />the power production was curtailed even further than estimated <br />on the basis of mean conditions. <br /> <br />Irrigation releases to downstream users have been maintained <br />at the minimum practical levels during the entire operating <br />year to date. Mexican water orders totaling 1.5 maf have been <br />honored during the past calendar year. The total delivered to <br />Mexico has been some 18 percent in excess of their total order. <br />This excess includes the effects of rainfall or cool weather <br />cutbacks of Imperial Darn diverters which augment totals to <br />Mexico because of the lack of terminal storage at Imperial Dam. <br />It also includes a river sluicing operation carried on last <br />January and February to alleviate a sediment build-up in the <br />river below Morelos Dam. When you consider that it takes three <br />days for water released from storage at Parker Dam to reach Im~ <br />perial Dam and as much as 10 days for the same water to reach <br />remote user districts, together with the multiple effects of <br />wet or cool weather, intervening illegal water users, and the <br />problems of passing a flow down 150 miles of badly braided <br /> <br />Information Bulletin #18 <br /> <br />-2- <br /> <br />January 12, 1962 <br /> <br />.': <br /> <br />if <br />