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<br />of the long-standing interstate controversy was also a Congressional <br />consideration. Subsequent enactments provided that the costs and <br />responsibility for construction, operation and maintenance be borne <br />entirely by the United States vathout charge to the beneficiaries. <br />Construction of the John lAartin Reservoir Project was <br />initiated in 1939, suspended during the war years, and substantially <br />completed in 1948. The resulting reservoir has a total storage <br />capacity of approximately 700,000 acre-feet of which the upper <br />280,000 acre-feet (above elevation 3851) have been initially <br />allocated to flood control, and the lower 420,000 acre-feet (below <br />elevation 3851) have been initially allocated to water conservatiom. <br />F10o~ control operations of John Martin Reservoir are <br />designed to prevent or reduce the danages, from Arkansas River floods <br />originating upstream from Caddoa, to lands and; properly ilm Coloraxio <br />and Kansas downstream from Caddoa. Reservoir operations for <br />conservatiom purposes will permit regulatiolID of the normal flows of <br />the Arkansas River at Caddoa that preViously were divertecL by <br />irrigators downstream in Colorado and Kansas when and as they occurred, <br />thereby making,' such flows available for diversion more nearly when <br />and as, needed for the irrigation of crops; and will enable capture <br />ard conservatiolID, for additional diversion and; increased use in both <br />States, of the flood flows of the Arkansas River at Caddoa, - (up to <br />the available capacity of the conservation pool) - that were <br />, preViously incapable of being diverted or used in either State. <br />It has been estimated, on the assumptiolm of recurrence of <br />river flow as recorded for the 35-year period from 1908 to 1942, <br /> <br />-9- <br /> <br />