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Water Levels in the Southern High Plains Page 3 <br />Designated Ground Water Basin - 1999 <br />The reader will note that where water level is zero with no additional data entry, that no water <br />level measurement was taken during those subsequent measurement periods. <br />The average decline of water level within the network was -1.70 feet for 1999 as compared to <br />-2.00 feet for 1998 and -1.35 for 1997. <br />The average rise in water level was 1.49 feet for 1999 as compared to 1.21 feet in 1998 and <br />2.28 in 1997. <br />A map depicting the location of monitoring wells, as well as individual well data and selected <br />well hydrographs, has been modified by GPS information and replacement well information and <br />follows this text. Additionally, a listing entitled "Well Locations" fists the GPS results for all well <br />sites visited in 1996 and 1997 and utilized in the GIS map as well as 1997 data not yet <br />incorporated in the map. <br />Ogallala Aquifer <br />A total of eight wells completed wholly or in part within the Ogallala aquifer experienced declines <br />of -0.20 to -2.50 feet. Several wells experienced rises in water levels. The average rise was <br />+ 1.43 feet as compared to + 1.03 feet of rise in 1998. In 1998-1999 the average decline of <br />Ogallala wells was -1.92 feet as compared to the average Ogallala well decline of -1.87 in 1997- <br />1998. The average of all changes was -0.01 feet of decline, as compared to -0.91 feet of <br />average decline in 1997-1998. Primarily declines were greatest in the northeastern Baca and <br />southeastern Prowers counties as it was in 1997-1998. <br />