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<br />A <br />V <br /> <br /> <br />OC2228 <br /> <br />~~e~d~~-4 <br />Oral - GSA <br /> <br />. <br /> <br />INTRODUCTION <br /> <br />The Water Resources Division of the U.S. Geological <br /> <br />Survey began an integrated study of the water resources <br /> <br />of the Arkansas Valley, in cooperation with the Colorado <br /> <br />Water Conservation Board and the Southeastern Colorado <br /> <br />Water Conservancy District, in 1963. <br /> <br />Figure l.--Map of the Arkansas Valley. <br /> <br />The reach being studied between Pueblo, Colorado and <br /> <br />. <br /> <br />the Kansas line, a distance of 150 miles, is shown on this <br /> <br />map. The area shown in yellow outlines the approximate <br /> <br />extent of the valley-fill aquifer. The aquifer--consisting <br /> <br />of. sand, gravel, clay, and silt--ranges from 1 to 8 miles <br /> <br />in width. The river is hydraulically connected with the <br /> <br />aquifer, and ground water and surface water constitute a <br /> <br />common supply. <br /> <br />. <br /> <br />~ <br /> <br />), <br />