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<br />,",' <br /> <br />. <br /> <br />. <br /> <br />, <br /> <br />2xpenditures be made for some elements in t~e :Loodw3!, t~en <br /> <br /> <br />:l:lY suc:-J recommendations would have t,:) 'Je "3ubr;1i::ed to <br /> <br /> <br />Congress for implementation. <br /> <br /> <br />Sec. 5(b) (1). Since the flows carried by the Colorado <br /> <br /> <br />River below Davis Dam include both t~releases from Davis <br /> <br /> <br />Dam and any inflow from the ephemeral tributaries entering <br /> <br /> <br />the mainstream below the Dam, a floodway, to be effective, <br /> <br /> <br />must have the capacity to carry both the cont:olled reLeases <br /> <br /> <br />and such tributary inflows. In this section, the Secretary <br /> <br /> <br />is directed to complete, in consultation wit~ the seve:l 3asin <br /> <br /> <br />states and other interested parties, a scady of these <br /> <br /> <br />tributary inflows and to determine the boundaries of the <br /> <br /> <br />Colorado River Floodway to accommodate both controlled <br /> <br /> <br />releases and tributary inflows. <br /> <br /> <br />The standard level of protection that has been a:3opted <br /> <br /> <br />in the administration of the National Flood Insurance Act is <br /> <br /> <br />the one-in-one-hundred-year frequency flood. As mentioned <br /> <br /> <br />earlier in this statement, the Corps of Bngineers had <br /> <br /> <br />determined that 40,000 cfs is the maximum release rate that <br /> <br /> <br />historically would have inflicted a minir;1um level of <br /> <br /> <br />Jownstream damages. Consequently, the bou:ljaries of the <br /> <br /> <br />Colorado River Floodway should be capable of accommodating a <br /> <br /> <br />one-in-one-hundred-year river flow or a 40,000 cfs flow, <br /> <br /> <br />'..hichever is greater, from Davis Dam to the SO'Jt:-Jerly <br /> <br /> <br />International 30undary between the United 3tates 3nj the <br /> <br /> <br />R2public of Mexico. <br /> <br />-14- <br />