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<br />As shown by the well map there are some wells which lie to the west of the amendment area <br />which could potentially be impacted by the dewatering. These wells are located on the up <br />gradient :;ide of the permit. This should reduce drawdown impacts to some degree. These wells <br />are drilled adjacent to a minor tributary (Dry Creek) that feeds St. Vrain Creek. This creek's <br />flow is mainly irrigation return flows and stormwater. Flows in this creek will also provide <br />some recharge to the adjacent wells. Once mining and dewatering has started, groundwater levels <br />in the immediate vicinity are expected to drop. If the water levels aze dropping in adjacent wells <br />such that well owners may be injured, the operator will begin to implement one or more of the <br />following measures. <br />a. Construct recharge ponds at strategic locations within the permit boundary to <br />begin aquifer recharge. <br />b. Modify existing wells to operate under lower groundwater conditions. This would <br />include re-drilling existing wells to deeper depths or lowering the pumps. All <br />work would be done at the operator's expense with the exception of replacing <br />equipment that was non-functional prior to mining. <br />c. If existing wells cannot be repaired, then the operator will drill a new well for the <br />owner to replace the damaged well. The new well will have to produce water of <br />the same quantity and quality. <br />If a well has not been put to beneficial use prior to mining, the operator will have no <br />responsibility to provide mitigation. <br />Discharge Permit <br />A permit :from the Colorado Health Department to dewater the mine site is already in place for <br />the existing operation. Anew point of discharge will be added to the permit for the amendment <br />area. <br />404 Dredge and Fill Permit <br />A wetlands survey of the amendment property has been conducted and it has been determined <br />that less than 1 acre of wetlands will be impacted due to the mining activities. Therefore, a <br />Nationwide Permit has been obtained from the Army Corps of Engineers for the amendment area <br />which pennits the dredging and/or filling of less than 1 acre of wetlands. <br />A copy of the letter from Army Corps of Engineers is attached at the end of Exhibit D -Mining <br />Plan. <br />Stormwater Management Plan <br />A Stormw;tter Management Plan is in place for the existing operation. The plan will be updated <br />to include the amendment area. <br />10 <br />