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2.0 INTRODUCTION <br />2.1 PURPOSE AND SCOPE <br />This report presents the findings of a study of the ground -water resources in the <br />Southern High Plains Designated Ground Water Basin (Basin), for the Southern High <br />Plains Ground Water Management District (District). This study is the second phase of <br />an overall assessment of the District's use and supply of ground water to assist the <br />District in developing future management policies for the remaining ground -water <br />resources in the Basin. <br />The Basin is located in southeastern Colorado south of the Arkansas River Basin and <br />encompasses portions of Prowers, Baca, and Las Animas counties in Colorado. The <br />study was commissioned by the District and began on July 1, 2001. The Colorado <br />Water Conservation Board provided the funding for the study. The Colorado Division of <br />Water Resources provided project oversight on behalf of the District. <br />The principal objectives of the Phase 2 study were to: <br />1. Refine the conceptual model of the Basin aquifer system that was developed <br />in the Phase 1 Study by obtaining and evaluating additional well logs from the <br />Division of Water Resources. <br />2. Define the general hydrogeologic properties and geometric relationships <br />between the aquifers to facilitate the management and administration of the <br />ground -water resources in the District. Accomplish this by reviewing <br />available published information, and developing geologic cross-sections and <br />maps of each aquifer <br />3. Determine the economically recoverable volume of ground water in each <br />aquifer from the development of saturated thickness maps and estimates of <br />specific yield and average sandstone/siltstone thickness in each aquifer. <br />4. Develop options for the administration of existing and new wells for each <br />aquifer in the District. <br />The information gained from accomplishing these objectives was used to complete the <br />following major tasks for the District: <br />II -1 <br />99-028.003\Phase 2 Report\ SHP Introduction <br />