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1\ <br />WATER LEVELS IN THE SOUTHERN HIGH PLAINS <br />DESIGNATED GROUND WATER BASIN - 1997 <br />The purpose of this report is to provide 1997 water level measurements from monitoring wells <br />in the Southern High Plains Designated Ground Water Basin. The project is ongoing, with the <br />cooperation of local well owners as well as the Southern High Plains Ground Water Management <br />District (SHPGWMD). Funding for the project is provided in part by utilizing revenues generated <br />by Senate Bill 200, passed during the 1987 legislative session. Well measurements of water <br />levels were conducted by the SHPGWMD under contract with and supervision by the Colorado <br />Division of Water Resources (DWR). Additionally, in 1996 and 1997, exact locations of well <br />structures were obtained by utilizing GPS units (see Well Locations section). The plotting of this <br />1997 map of monitoring well locations was done by GIS techniques utilizing the 1996 GPS data. <br />In the 1997 measuring period, a total of 72 well sites were visited, including two measurements <br />from the Town of Springfield. Three wells were not measured because they were pumping. <br />Nine new wells were added to the network in the 1996 measurements (see 'Remarks'). <br />Measurements were made starting February 1, 1997, and were completed by February 21, <br />1997. <br />The aquifer designations used on the following hydrographs, data sheets and figures are as <br />shown in the following Table 1. <br />Table 1 - AQuifer Descriptions <br />' Arithmetic average of monitored wells. ** estimated - no data available. <br />*< = slightly less than <br />*> = slightly greater than <br />limestones, and red to buff, <br />fine to coarse sandstone. <br />Avg. Sat. <br />Total <br />Symbol <br />Name <br />Thickness' <br />Thickness <br />Description <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 75 <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 />* c 100 <br />40-250 ft. <br />Fine grained, massive <br />light-colored sandstone. <br />TRd <br />Dockum aquifer <br />50 * * (est'd) <br />0-570 ft. <br />Red siltstone, shales, <br />' Arithmetic average of monitored wells. ** estimated - no data available. <br />*< = slightly less than <br />*> = slightly greater than <br />limestones, and red to buff, <br />fine to coarse sandstone. <br />