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Evaluation of Potential Impacts <br />From The Proposed Nix Property Sand and Gravel Operation <br />On Shallow Groundwater Levels, Water Wells and Wetlands <br />wetland and neighboring water supply wells. The proposed reclamation plan is shown on Sheet <br />3. <br />Evaporation losses occurring from the ponds were assumed to impart an immeasurable amount <br />of change in the lake surface elevation relative to lake leveling and, as such, were ignored. <br />Nonetheless, evaporative losses represent an annual loss to the groundwater system that must be <br />accounted for from a water rights standpoint. <br />4.0 EVALUATION RESULTS <br />4.1 Groundwater <br />Table 3 summarizes the available information on these wells and the observed groundwater <br />levels during this monitoring period. The data obtained from this period shows that groundwater <br />across the property flows in a northwesterly direction towards St. Vrain Creek. This is <br />graphically represented by the groundwater table contours interpreted from the September 14, <br />2001 data, as shown on Sheet 4. The groundwater gradient vanes from a low of approximately <br />0.5 percent beneath the Nix property to approximately 1.5 percent upgradient of the proposed <br />mining area. <br />Considering the leveling phenomenon previously described, the groundwater conditions <br />represented on September 14, 2001 and the proposed reclamation plan, WWE estimated the <br />reclamation pond water surface elevation for each of the proposed mining areas. These <br />elevations are shown on Sheet 4, and are as follows: <br />• Mine Area 1 ± 4,799 <br />• Mine Area 2 ± 4,792.5 <br />• Mine Area 3 ± 4,796 <br />• Mine Area 4 ± 4,793 <br />' o»-o~a.ooo <br />April 2002 <br />Wright Water Engineers, Inc. <br />Page 8 <br /> <br />