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WATER LEVELS IN THE ALLUVIAL AQUIFERS OF THE <br />LOWER SOUTH PLATTE RIVER BASIN, COLORADO <br />1997 <br />By Chuck Roberts <br />The purpose of this report is to provide water level data for 63 wells within the Lower South <br />Platte Alluvium for the period of Spring of 1988 through the Spring of 1997. The data <br />presented in this report is a result of cooperation between well owners, the Central Colorado <br />Water Conservancy District, and the Colorado Division of Water Resources. Funding for this <br />project is supplied in part from well permit fees collected and managed by the Colorado <br />Division of Water Resources as a result of the passage of Senate Bill 200 during the 1987 <br />legislative session. <br />The following body of this report includes up to 18 water level measurements for the <br />indicated period in addition to a water level measurement taken at the time of construction <br />of the well, if available. Measurements are usually taken twice yearly, typically in the spring <br />before irrigation pumping commences and in the fall after irrigation pumping has ceased. The <br />measurement values in this report are expressed in feet below ground surface to water <br />surface and were obtained utilizing an electric sounder device or steel tape. All measurements <br />were done by Division 1 Water Commissioners (DWR) or the Central Colorado Water <br />Conservancy District (CCWC) as indicated for each well. All of the wells are completed in <br />unconsolidated gravel, sand, silt and clay deposits predominantly of alluvial origin. The <br />column entitled AQUIFITRIB in the main body of the report delineates the geologic unit and <br />stream reach for each well as explained on page 4. Figure 1 is a map showing the <br />approximate location of the wells measured for this report. The South Platte River is shown <br />in blue. The approximate outline of the South Platte River alluvial aquifers is depicted in red. <br />- 1 - <br />