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Water Levels in the Southern High Plains Page 2 <br />Designated Ground Water Basin - 1999 <br />Table 1 - Aauifer Descriptions <br />limestones, and red to buff, <br />fine to coarse sandstone. <br />A review of the 1998 measurements as compared to the 1997 measurements reveals that the <br />following water level changes have occurred since the last measurement period (1997): <br />water level declines = 38 wells as compared with 20 between 1996 and 1997 <br />water level rises = 29 wells as compared with 45 in the 1996-97 report <br />no measured change in water level = 3 wells as compared to 1 in 1996-97 period <br />' Arithmetic average of monitored wells. ** estimated • thickness including Entrada ss. <br />*< = slightly less than <br />*> = slightly greater than <br />Avg. Sat. <br />Total <br />Symbol <br />Name <br />Thickness' <br />Thickness <br />Description <br />Qal <br />Alluvium <br />0=60 <br />0 =100 ft. <br />Unconsolidated sands and <br />gravels. <br />To <br />Ogallala aquifer <br />* > 50 <br />0-200 ft. <br />Sand, gravel, silt, clay <br />and limestone. <br />Kd <br />Dakota aquifer <br />* c 125 <br />80-150 ft. <br />Fine grained, thin to <br />massive sandstone with <br />clayey to sandy shales, <br />light to dark brown. <br />Kc <br />Cheyenne aquifer <br />* < 100 <br />40-250 ft. <br />Fine grained, massive <br />light-colored sandstone. <br />Kdp <br />Dakota -Cheyenne <br />- <br />- <br />Aquifer unit by virtue of <br />completion in Dakota and <br />Cheyenne sandstones with <br />absence of intervening <br />Kiowa shale. <br />TRd <br />Dockum aquifer <br />300* * (est'd) <br />0-570 ft. <br />Red siltstone, shales, <br />limestones, and red to buff, <br />fine to coarse sandstone. <br />A review of the 1998 measurements as compared to the 1997 measurements reveals that the <br />following water level changes have occurred since the last measurement period (1997): <br />water level declines = 38 wells as compared with 20 between 1996 and 1997 <br />water level rises = 29 wells as compared with 45 in the 1996-97 report <br />no measured change in water level = 3 wells as compared to 1 in 1996-97 period <br />' Arithmetic average of monitored wells. ** estimated • thickness including Entrada ss. <br />*< = slightly less than <br />*> = slightly greater than <br />