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<br />-, <br /> <br />. <br /> <br />. <br /> <br />storage regulation on a scale that dwarfs past development. Such <br /> <br />regulation is necessary because the four states of the U)lper Division <br /> <br />have the jnint responsicility under the 1922 compact (Arizona being <br /> <br />omitted from this rvsponsibility) to bypass at Lee Ferry to the Lower <br /> <br />Basin a total of 75 ~illion acre-feet of water in any consecutive 10-~ear <br /> <br />period, exclusive of the possibility of bypassing additional amounts to <br /> <br />meet Mexican Treaty reouirements. Only through regulating the erratic <br /> <br />flow of the river can the Lee Ferry obligation be met and still allow a <br /> <br />full use by the Upper Basin states of their allocation under the <br /> <br />Upper Basin Compact. This regulation can only be obtained by means of <br /> <br />large reservoirs holding over great quantities of water from years of <br /> <br />high runoff to years of low runoff. Judging from past records, these <br /> <br />cycles migHt be as long as 20 to 25 years and therefore these reservoirs <br /> <br />must be ready to store water many yc'ars ahead nf the actual time of. need. <br /> <br />The irrigation water users cannot pay for these large holdover <br /> <br />reservoirs nor should they be expected to pay the full cost thereof. <br /> <br />Fortunately the reservoirs are so situated and can be so operated that <br /> <br />power, although subservient to irrigation, can be developed as a paying <br /> <br />partner. Large amounts of electric energy are needed in the Uoper Basin <br /> <br />states as well as in the Lower Basin to meet the fast-growing power <br /> <br />demands and to permit development of our rich but dormant natural <br /> <br />resources, including known oil reserves, potential oil fields as yet <br />~ <br />on undiscovered, vast deposits of phosphate rock used in the manufacture of <br />l-" <br /> <br />00 fertilizer and ChemiCals, and other minerals. <br /> <br />These and many other problems ha"e been subjected to extensive <br /> <br />investiF,ation by the Bur0au of Reclamation for more than 20 years, and <br /> <br />4 <br />