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<br />........ <br /> <br />14 ~Iarch 1974 <br /> <br />MDIORANUlN <br /> <br />TO: <br /> <br />Chairman, Federa1 Subcommittee on Industrial \~ater f.larketing <br />Mr. John W. Neuberger <br /> <br />FRml: <br /> <br />Technical Group - I~ater Supply <br /> <br />SUBJECT: <br /> <br />Water Supply Information Requested by States Technical Committee - <br />Mr. Vem Butler, Leader <br /> <br />Your memorandum dated February 19, 1974, to this group posed the following <br />question: <br /> <br />At the 1970 depletion level, what is the breakdown rm a monthly basis <br />separating waters used for federally funded projects from projects <br />funded by State or private funding? <br /> <br />An exact answer to this question is not available at this time and the <br />detailed inventory and computations needed to develop a precise answer <br />would require an un\~arranted amount of work. The estimates of annual <br />depletions for the 1949-197U period, by functions, which \Vere presented <br />as Exhibit 2 in our Water Supply Technical Group report of 3 January 1974 <br />(revised on 15 January 1974), \Vere based on studies conducted in connection <br />wi th the 1969 Comprehensive Framework Study for the j'lissouri Basin. These <br />depletion estimates arc considered to be sufficiently reliable and accurate <br />for planning purposes and for determining tne availability of water to <br />meet future demands from the ~lissouri River. <br /> <br />All of the depletions (or accretions) listed in the referenced Exhibit 2 <br />are assignable to the Federal Sector, except for a portion of the irrigation <br />depletions and the minor depletions listed under the "Othor" category. <br />Thus depletions due to main stem and tribut:ary reservoir evaporation, <br />watershed treatment and ponds, and a portion of the irrigation depletions <br />are due to federally-funded programs. Depletions due to non-rederal <br />irrigation developments are a significant portion of the total, however. <br />Federally funded irrigation projects in the ~Iissollri Basin above Sioux <br />Ci ty represent about 23% of the total, or 650,000 acres versus 2,153,000 <br />acres private and State. TIle perccntage of total irrigation uepletions <br />assignable to Federal irrigation projects varies somewhat from reach to <br />reach, but gene!"ally ranges from about 15% in the basin above Fort Peck <br />to 23% above Sioux City. These percentages are applicable to the 1970 <br />level of development only; prior to 1910 there were no Federal projec~s, <br />and after 1970 it is expected that Federally financed irrigation developnents <br />wi~l become proportionally greater. <br /> <br />-. -~-r.~- ^ <br /> <br />=17'-.'- ~ <br /> <br />-. -. -,' - '.' "7' ~~.. .---.. -~-"- , <br /> <br />.-"'-.,-'--..'" <br /> <br />"'_.~- <br />