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`:? P 't <br />Applegate <br />PRO" <br />Group, inc. <br />Water Resource Advisors fora the West <br />Mif hg and qa* <br />April 28; 201 1 <br />Mr. Tony Waldron <br />Division of Reclamation, Mining and Safety <br />1313 Sherman St., Room 215, <br />Denver, CO 80203 <br />Re: Response to DRMS Letter Pertaining to Mining Operations-with Exposed Groundwater <br />N12003091- (Duckworth Pit);?009082 (Parsons Mme- <br />Dear Tony: <br />On behalf of Lafarge ,West; Inc. (Lafarge), I am writing to respond to the -Division of Reclamation, <br />Mining, and` Safety (DBMS) letter sent to Lafarge on April 30, 2010 regarding mining operations <br />with expo's'ed groundwater. The specific mining operations listed above do not currently-expose' <br />groundwater, but do anticipate exposing groundwater at some point in the future. In the case of the <br />Duckworth Pit, Lafarge does not anticipate exposing groundwater for at least two years; for the <br />Parsons Mine, Lafarge does not anticipate exposing groundwater for at least four years. <br />Because groundwater`:at these sites is not currently exposed and will not be exposed for a number of. <br />,years, Lafarge believes thatno further action is required `at this time. Prior to exposing groundwater, <br />La argewill identify a method to-maintain compliance for these sites, be it a decreed augmentation <br />plan increased bond for lining and/or baekfilling, or some other Solution. <br />_to <br />.If you have any questions or need further inforination, please contact me at (303)-452-661 ]or via <br />email to iof•eddains?apt)le;ategi:ou?. conc. <br />Cordially, <br />Applegate Group, inc. - <br />Jared Daifts, E. 1; <br />Water'Resource Engineer <br />? JM D/ta „ <br />cc AG,FileNb.05-105 <br />Lafarge West, Inc. <br />N:\05105 Lafarge Water Planning\pisciplines,(Technical)\Water Riglrts\LONG:TERM OBLIGATION S\Bon d ing\ DRMS Bonding Response Letter (Exposure in <br />iuiure')Aoox <br />1499 West 120th Avenue, Suite 200 (303) 452-6611 • Fax (303) 452-2759 <br />Denver, Colorado 80234 ` www.applegategroup.COM