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<br />. ,-, <br />~:)'v0 <br /> <br />'.Jll <br />1;"- (~') <br /> <br />. <br /> <br />furaisn occasional flo~ds of ~agnitude from dir~ct <br /> <br />precipitation, dus to which their control is important <br /> <br />from the standpoint of the flood menace. <br /> <br />In the study of this problem, it has b0~n damonstrated <br /> <br />that for several reasons it is desirablo to nave a reservoir <br /> <br />below the Grand Canyon of the Color?~o, which will int~rco~t <br /> <br />most of the dr~inage of the Colorado Rivur, and therefore, be <br /> <br />a more complete solution of the flood control problem. This <br /> <br />method of control is still more vital for ot~cr r3asons. <br /> <br />The large areas of very fertile ?~d valuable lands now <br /> <br />doveloped and being rapidly developed, re~uire imLediate <br /> <br />. <br /> <br />relief by extension of storage for irrigation, and if such <br /> <br />storage is constructed in the upper basin, it will of course <br /> <br />be o~3rated in conformity.\vith the requireffionts of irrigation <br /> <br />in the lower valley as no.".rly a.s t:lis ca.n be predicted, but <br /> <br />a large percontago of the Ivat"r \'Iill be lott owing to the <br /> <br />great dist~ce a~d the impossibility of ~redicting the exact <br /> <br />requireraents a month Or more ahead. urn order to provide <br /> <br />aganst embarrossing shortage, it will be necessary to turn <br /> <br />out at all times sufficient wat'3r to provide for the l!lost <br /> <br />extreme conditions that ~ occur, but which seldom do occur, <br /> <br />and t:c_is will mean th'.t nearly all the time a large amount <br /> <br />of watsr will be flowing to w-",ste. A larE;e part of ti1is wacte <br /> <br />can be obviated cyan adequate reservoir on the lower river. <br /> <br />. <br /> <br />In addition to the ~bove waste, any water supply ap- <br /> <br />propriated above :lor use in t:~e lo'vor lfalley would not be <br />