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<br />LAFARGE <br />AGGREGATES <br />& CONCRETE <br />March 11, 2010 <br />MAR € 5 2010 <br />Divip.n Of "clamaWp" <br />1v Mining and Sa%tY <br />.? - AO <br />4e-c Mr. David Bird SENT VIA CERTIFIED MAIL 7007 2680 0001 0954 9550 <br />Colorado Division of Mining, Reclamation and Safety <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />RE: M1986-079 Technical Revision, proposed TR-08 <br />Dear Mr. Bird, <br />Please accept this letter and enclosed map as Lafarge's request for a Technical Revision for File <br />Number M-1986-079. <br />Final lake configurations <br />The final lake configurations have been illustrated on the attached map. Lafarge utilized a GPS <br />device to identify the current lake boundaries. Previous Technical Revisions were made to <br />accommodate fill material at this site. A fill repository is not needed for the entire site. Fill <br />material has been placed in portions of the property in accordance with previous Technical <br />Revisions and the Backfill Activity Rule 3.1.5 (a) through (f) as evidenced in a letter from <br />Lafarge dated September 6, 2006. <br />Final roadway locations <br />The existing roadways and entrance drives are to remain as illustrated on the attached map. The <br />roads are to remain for property maintenance. <br />A check in the amount $216.00 is enclosed for application processing. <br />Sincerely, <br />{kh,u,'Pvm Johoh---.- <br />Anne Best Johnson, AICP <br />Land Manager <br />LAFARGE NORTH AMERICA INC. <br />11409 Business Park Circle, Ste 200 <br />Longmont, CO 80504 <br />(303) 657-4000 <br />www.lafargenorthamerica.com