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HAHN WATER RESOURCES, LLC <br /> Figure 2 (below) shows the model-predicted groundwater level decline (drawdown) in plan view. <br /> The semi-concentric circles (with white labels) indicate lines of equal water level decline in feet, <br /> predicted at 100 days following the start of dewatering. The model predicts that the water level <br /> lowering will be laterally extensive. This behavior is consistent with a highly permeable system <br /> as exists at the Rifle No. 1 pit. <br /> h <br /> i <br /> Figure 2. Contours of Groundwater Level Lowering (Drawdown) Following 90 Days of <br /> Dewatering <br /> To the extent that the on-site wetlands are dependent on the underlying groundwater system, it is <br /> likely that these wetlands will disappear in a relatively short period of time (months to years) <br /> following the onset of dewatering. To the extent that such wetlands depend on an influx of <br /> surface or near-surface water (tail water, irrigation returns, etc.), the current plans to intercept <br /> these inflows will also likely result in the disappearance of the wetlands in a relatively short <br /> period of time. <br /> Respectfully submitted, <br /> William F. Hahn, P.G. <br /> 4 <br /> 6589 Elaine Road -Evergreen, Colorado 80439 - office 720.242.8639 -cell: 303.870.5757 <br /> hahnwaterresources@gmail.com - www.hahnwaterresources.com <br />