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WATER LEVELS IN THE ALLUVIAL AQUIFERS OF THE <br />LOWER SOUTH PLATTE RIVER BASIN, COLORADO <br />1999 <br />By Chuck Roberts <br />The purpose of this report is to provide water level data for 64 wells within the Lower South <br />Platte Alluvium for the period of Spring of 1988 through the Spring of 1999. 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 22 water level measurements for each well, <br />for the indicated period in addition to a water level measurement taken at the time of <br />construction of the well, if available. Measurements are usually taken twice yearly, typically <br />in the spring before irrigation pumping commences and in the fall after irrigation pumping has <br />ceased. The measurement values in this report are expressed in feet below ground surface <br />to water surface and were obtained utilizing an electric sounder device or steel tape. All <br />measurements were done by Division 1 Water Commissioners (DWR) or the Central Colorado <br />Water Conservancy District (CCWC) as indicated for each well. All of the wells are completed <br />in unconsolidated gravel, sand, silt and clay deposits predominantly of alluvial origin. The <br />column entitled AQUIF/TRIB 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 GIS generated map showing <br />the recorded location of the wells measured for this report. The South Platte River is shown <br />in purple. The recorded outline of the South Platte River alluvial aquifers is depicted in gold. <br />- 1 - <br />