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Loloff Construction, Inc. — Loloff Pit—File No. M-1985-112, Responses to Letter Dated April 23, <br /> 2015 regarding Groundwater Monitoring Data <br /> 5/22/15 <br /> -2- <br /> 3. Based on the Division review of the Derr Pit monitoring well data (TB-1, TB-7, <br /> and TB-8) and the adjacent landowner well data submitted by the Operator, the <br /> Division believes the dewatering of the Loloff Mine has caused a greater than <br /> 2-foot change from historical groundwater levels. <br /> Response: <br /> We agree that the trigger levels have occurred at the Derr Pit but there are not any <br /> other wells being affected on the east side of the Loloff Pit. Please see our response <br /> to comment 2 for the Loloff Construction plan for addressing and providing solutions <br /> to the issues with any of the wells. <br /> Loloff Construction has implemented a recharge ditch system on the west side of the pit. The <br /> recharge ditch was cleaned earlier this year and it currently backs water up from the existing <br /> pump discharge to the north. The water level is backed up so it may flow into the Monroe pond <br /> and recharge in that location. The ditch backs up further to the north to roughly '/z of the length <br /> of the west property line. <br /> Loloff Construction would like to continue the current plan that is being implemented at this time, <br /> while continuing to monitor the existing wells and working with the well owners with any issues <br /> they may have. <br /> Sincerely, <br /> J.C. York, P.E. <br /> J&T Consuttfn&Inc. <br /> cc: Loloff Construction, Inc. <br /> 4 I 305 Denver Avenue—Suite D-Fort Lupton.CO 80621 -Ph:303-857-6222•Fax:303-857-6224 <br />