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<br />G,A' <br /> <br />made operable by Congress through enactment of the Colorado River Storage Project <br /> <br />Act that created Lake Powell and the Colorado River BasIn Project Act that legally <br /> <br />defines the parameters of its operation? A number of other laws enacted by the <br /> <br />Congress are dependent for theIr fulfillment on the operation of Lake Powell. <br /> <br />Prudent operation of the reservoir also makes possible the compliance with <br /> <br />numerous court decrees, including the Supreme Court decree in the famous <br /> <br />12-year-Iong Arizona v. CalifornIa lawsuit. <br /> <br />The so-called queue theory employed by Walter B. Langbein, an eminent <br /> <br />hydrologist of the U. S. G,oloqlca I Survey, is merely one of a number of mathe- <br /> <br />matlcal tools used In statistical analysis. Like any other correlation analysis, <br /> <br />It is a good tool for estimating probabIlItIes of phYSical quantitIes or occurrences. <br /> <br />It can not be applied to the runoff from the Colorado River as a whole In the <br />J <br /> <br />manner assumed by Dr. Guadaonol because of the legill ilnd Institutional constraints <br /> <br />alluded to above that have been Imposed by man, and which are binding. Whether <br />. . <br /> <br />one likes these constraints or not Is beside the point. They exist, and they do <br /> <br />influence river operations. <br /> <br />The Upper Basin States aT)d the Congress have long ago repudiated the <br /> <br />Langbein study as a final determinant in Colorado River development and reservoir <br /> <br />operations simply because of its lack of applIcability when all facets of thIs <br /> <br />river's problems are considered. Mr. LangbeIn astutely recognIzed this point <br /> <br />himself when he stated In his report cIted by the doctor that, "These conclusions, <br /> <br />. . . as reported under operating conditIons, re flect practical gaIns or losses in <br /> <br />regulation of water by reservoirs. The present analysis (Langbein's) deals only <br /> <br />with the problem of water supply and is intended only to convey a principle. <br /> <br />3 <br /> <br />- <br />