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S I <br /> d m <br /> m <br /> 0 <br /> 0 <br /> c> <br /> m <br /> o <br /> voir would be divided for the purpose of the two objects <br /> of flood control and water ooneervation at an elevation of Z; <br /> 3861, and assumed that the space below 3651 might be utilized Z <br /> by the two states for conserving water for irrigation use, <br /> assuming that the space above an elevation of 3861 would be <br /> reserved by the War Department for the purposes of flood eon- �. <br /> tom.. <br /> We had previously adopted an initial capacity table as <br /> prepared by the War Department showing the oapaai ty total in <br /> Caddo& Reservoir at which feet in gauge height, before any <br /> siltation had affected that storage capacity, totaled approxi- <br /> mately 704,000 acre feet. This assumption we made is that sub- <br /> . <br /> sequently 280,000 of that initial capacity would be reserved <br /> for flood control and the balance, about 420,000, initially <br />-. . would be available for irrigation, <br /> low, we also assumed there that certain anowats of silt <br /> will aoouaslate more or less progressively in that resergroiro <br /> and the total of that amount of silt as estimated by the eon- <br /> sittse is based largely upon tests of silt made by the Army <br /> winter. approximately 260,000 acre feet in a 35-year period <br /> that we used for study purposes. Some of that silt, according, <br /> to our best judgatent, will acoutAulate above an elevation of <br /> 3b1, and therefore will diminish the capacity available for <br /> flood control below the initial 280,000 acre feet. However, <br /> a great majority and practically all of the silt will be de- <br />