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HAHN WATER RESOURCES, LLC <br /> quickly following the cessation of dewatering, returning to pre-mining levels within about 6 <br /> months. <br /> Groundwater Level vs Time Near East Bound aryof Pit <br /> 0 � <br /> J <br /> 2 ± <br /> C t <br /> E 4 Il <br /> 2 <br /> j <br /> Dewatering assumed to end after 5 years <br /> 8 ; <br /> C <br /> c 10 <br /> u 0 1 2 3 4 5 6 - <br /> ai <br /> Years From Start of Dewatering <br /> Figure 1. Predicted Groundwater Level Decline vs.Time in Response to Dewatering <br /> Figure 2 (below) shows the model-predicted groundwater level decline (drawdown) in plan view <br /> as predicted for a dewatering system consisting of wells. The semi-concentric circles (with white <br /> labels) indicate lines of equal water level decline in feet, predicted at the end of 5 years of <br /> continuous dewatering. The model predicts that the water level lowering will be laterally <br /> extensive. This behavior is consistent with a highly permeable system as exists at the Rifle No. 1 <br /> pit. <br /> s, <br /> Figure 2. Contours of Groundwater Level Lowering(Drawdown)Following 5 Years of Dewatering <br /> 3 <br /> 6589 Elaine Road -Evergreen,Colorado 80439 • office 720.242.8639 - cell: 303.870.5757 <br /> hahnwaterresources@gmail.com • www.hahnwaterresources.com <br />