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1600 West 12th A+e <br /> DENVER WATER RECEIVED 303.6 8CO.60 0204-3412 <br /> 303.62r3.6000 <br /> denverwater.arg <br /> t-/JUN 20 2016 <br /> DIVISION OF RECLAMATION <br /> MINING AND SAFETY <br /> June 10, 2016 <br /> Mr. Eric Scott <br /> Colorado Division of Reclamation Mining and Safety (DRMS) <br /> 1313 Sherman Street, Room 215 <br /> Denver, Colorado 80203 <br /> v <br /> Reference: M-2004-078, Lupton Lakes Resource <br /> Dear Mr. Scott, <br /> Please find enclosed documentation for a Technical Revision to permit M-2004-078. <br /> The revision includes changing the seepage barrier in Pond 1 from a compacted clay <br /> liner to a soil-bentonite barrier wall. The current mining effort has adversely <br /> impacted several adjacent wells and constructing a barrier wall is the quickest and <br /> most economical method of correcting the impacts to the wells. We are considering <br /> constructing a similar barrier wall in Pond 2 and we will submit a subsequent <br /> Technical Revision if and when we choose to proceed. The following items are <br /> included in the submittal package: <br /> 1. Request for Technical Revision Cover Sheet <br /> 2. Meeting Notes from June 6, 2014 DRMS Coordination Meeting <br /> 3. 30% Design Drawings for Soil-Bentonite Barrier Wall <br /> Please contact me at devin.shable@denverwater.org or 303-628-6365 for questions, <br /> concerns, or additional information. <br /> Sincerely, <br /> p�.,u>Jc,r, ALb& <br /> Devin D. Shable, P.E. <br /> Design Project Manager <br />