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WATER LEVELS IN THE SOUTHERN HIGH PLAINS <br />DESIGNATED GROUND WATER BASIN — 2003 <br />This report of the 2003 water levels in the Southern High Plains Designated Ground Water <br />Basin is the 14' of a series of annual reports. The measurements were completed primarily <br />before and during early March, 2003 by experienced personnel of the Southern High Plains <br />Ground Water Management District (SHPGWMD). <br />The well locations, where identified by the Public Land Survey System (Township, Range <br />and Section), were obtained primarily from well permit information. Location information <br />given in terms of the Universal Transverse Mercator (UTM) system was obtained by a GPS <br />(Global Positioning System) survey conducted by SHPGWMD personnel. All well locations <br />reported by the GPS survey were assessed utilizing an "averaging" technique resulting in <br />reported locations within +1-10 meters of their true locations. The averaging technique, as <br />well as the lack of Selective Availability (SA -the intentional jamming of GPS signal <br />terminated in May of 2000), have provided more accurate GPS surveyed locations than <br />previous estimates. GPS locations still need to be topographic map verified. The GPS <br />survey locating of new wells will be a continuing operation concurrent with water level <br />measurement. <br />A total of 95 wells were monitored this report year providing adequate coverage within the <br />basin pursuant to recommendations of the McLaughlin Water Engineer's report <br />"Hydrogeology and Water Resources of the Southern High Plains" (Phase 2 Study). <br />