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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 />April 12, 2015 <br />Greg Lewicki <br />Greg Lewicki And Associates <br />11541 Warrington Court <br />Parker, CO 80138 <br />RE: Hector Placer; DRMS File No. M-2011-009; Technical Revision No. 1 (TR -01) — <br />Adequacy Review No. 1 <br />Dear Mr. Lewicki, <br />The Division of Reclamation, Mining and Safety (Division) received Technical Revision No. 1 <br />for the above referenced site on April 21, 2015. The decision date for this Technical Revision is <br />May 21, 2015. The Division has reviewed the Technical Revision Application and has the <br />following comments: <br />Please indicate if either of the ponds which will receive water from the sluice are lined. If the <br />ponds are not lined, then clarify if there is a hydrologic connection between the ponds the <br />Middle Fork of the South Platte River. Have either of the ponds been excavated to determine <br />the depth of fines lining the pond bottom? Have static water tests been performed to <br />determine if water is seeping from the ponds? <br />2. Please specify how much Hyperfloc AE -582 will be stored at the mine at any given time. <br />3. Please specify where the Hyperfloc AE -852 will be stored at the mine site. <br />4. Please provide a description of how water is conveyed from the sluice tails pond to the lower <br />pond. <br />5. Please specify how the operator will handle any spills of the flocculent. <br />6. The permit file indicates that the ponds on site are spring fed. Please specify if groundwater <br />currently flows into the sluice tails pond or the lower pond. If water does not naturally flow <br />into the ponds, then specify how water is conveyed to the sluice and indicate if there are any <br />direct conveyances (pipes, ditches, etc.) from either of the ponds to the Middle Fork of the <br />South Platte River. <br />oF.co�. <br />�w <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.uls <br />John W. Hickenlooper, Governor I Mike King, Executive Director I Virginia Brannon, Director \ 1876 <br />