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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />I) ~.. !1 <br />L.J./... IJ <br /> <br />I. EXECUTIVE SUMMARY <br /> <br />The Colorado Springs Utilities (CSU), Water Resources Department recently <br />completed an update to their raw water delivery system plan. This plan identified <br />various raw water delivery system alternatives to meet Colorado Springs' water <br />needs for the next 50 years, The Southern Delivery System was selected based on <br />wide public support for being the most environmentally and economically feasible <br />delivery system, As part of the Southern Delivery System, the Colorado Canal <br />and Lake Meredith Reservoir were identified as an opportunity to provide raw <br />water storage for water exchanges to various upper Arkansas River basin <br />reservoirs including Pueblo Reservoir, Twin Lakes, Turquoise Reservoir, and <br />others, <br /> <br />Prior to evaluating reservoir enlargement opportunities, a water operation analysis <br />was conducted to assess potential storage requirements based on various Colorado <br />Canal diversions and scenarios, The Water Operation Analysis study is described <br />in further detail in Volume 1 of the Draft Lake Meredith Reservoir Enlargement <br />Study dated February 18, 1998, The study concept was to use the past 10 years <br />of water deliveries and releases to evaluate the potential for greater storage of <br />native water, winter water, Trans-mountain water, and Frying Pan-Arkansas (Fry- <br />Ark) Project water thereby optimizing the potential for water exchanges without <br />impacting current agricultural interests, Water exchanges are expected to occur <br />between one or all four of the following reservoirs; Pueblo, Twin Lakes, <br />Turquoise Lake, and Clear Creek with the potential for other reservoirs, The <br />Lake Meredith Reservoir Enlargement, Water Operation Analysis (Volume I) <br />study scope addresses the first three questions of the following six overall <br />questions regarding enlargement of Lake Meredith, The Reservoir Enlargement <br />Analysis study (Volume 2) addresses the remaining three questions, <br /> <br />I, What is the potential storage capability? <br />2, What water operational scenarios are needed for filling the reservoir? <br /> <br />URS Greiner <br /> <br />Page 1 <br />