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TA -dr <br />rDNR <br />c*co �% <br />April 23, 2015 <br />Mr. Randy Geist <br />COLORADO <br />Division of Reclamation, <br />Mining and Safety <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />Loloff Construction, Inc. <br />8018 1h Street, Suite 130 <br />Greeley, CO 80631 <br />Re: Loloff Construction, Inc., Loloff Mine, Permit No. M- 1985 -112 <br />Groundwater monitoring data <br />Mr. Geist: <br />The Division of Reclamation, Mining and Safety (Division /DRMS) has reviewed the content of <br />Loloff Construction, Inc. groundwater monitoring data submitted in response to the problem <br />cited by the Division during the March 12, 2015 complaint inspection (CT -03). The Division <br />received groundwater monitoring well data for the Derr Pit monitoring wells on March 18, 2015 <br />and groundwater elevation data from the adjacent well owners (Parker, Harrell and Francis) on <br />April 1, 2015. <br />The Division did not received groundwater elevation data for the Monroe well, which is <br />included in the approved groundwater monitoring plan. Please provide groundwater <br />elevation data for the Monroe well and begin the required monthly well monitoring, if not <br />started by the Operator. <br />In the Responses to Second Adequacy Review Comments for TR -01, dated October, 21, <br />2013, the Operator committed to providing the trigger level elevations from a 2 -foot change <br />from historical groundwater levels for each monitoring location with the groundwater data. <br />The Division has not received the trigger level elevations for the monitoring locations with <br />the groundwater data provided by the Operator. Please provide the trigger level elevations <br />for each monitoring well location. <br />Based on the Division review of the Derr Pit monitoring well data (TB -1, TB -7 and TB -8) and <br />the adjacent landowner well data submitted by the Operator, the Division believes the <br />dewatering of the Loloff Mine has caused a greater then 2 -foot change from the historical <br />groundwater levels. <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http: / /mining. state.co.us <br />John W. Hickenlooper, Governor I Mike King, Executive Director I Virginia Brannon, Director <br />of • cow <br />IR 6 <br />