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WATER LEVELS IN THE SOUTHERN HIGH PLAINS <br />DESIGNATED GROUND WATER BASIN - 2002 <br />This report of the water levels in the Southern High Plains Designated Ground Water Basin is the <br />2002 annual report of a series of reports which began in 1988. The measurements were <br />accomplished primarily in early March 2002 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 and <br />Section), were obtained from well permit information primarily. Location information given in terms <br />of the Universal Transverse Mercator (UTM) system was obtained by a GPS (Global Positioning <br />System) survey conducted by SHPGWMD personnel. All well locations reported by GPS survey <br />were assessed utilizing an "averaging" technique. The averaging technique, as well as the lack of <br />Selective Availability (SA - the intentional jamming of GPS signal terminated in May of 2000) <br />provided GPS surveyed locations more accurate than previous estimates. GPS locations still need to <br />be topographic map verified. The GPS survey locating of wells will be a continuing operation <br />concurrent with water level measurement. <br />A total of 18 additional wells were added to the monitoring network for this report last year in order to <br />provide better coverage within the basin. The choice of additional wells was guided by <br />recommendations in the McLaughlin Water Engineer's report "Hydrology and Water Resources of <br />the Southern High Plains" (January 2001). Decisions and well selections in the field have resulted in <br />different wells from those meeting the McLaughlin report criteria being selected. Consequently, <br />additional wells should be added in subsequent reports in order to accomplish the recommended <br />coverage outlined in the McLaughlin report. <br />-1- <br />