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Sincerely, <br />September 26, 2012 <br />Mr. Eric Scott <br />Dear Mr. Scott, <br />attachment <br />Climax Mo/ybdenum <br />A Freeport - McMoRan Company <br />Environmental Protection Specialist <br />Division of Reclamation, Mining and Safety <br />Department of Natural Resources <br />1313 Sherman St. Room 215 <br />Denver, Colorado 80203 <br />Raymond Lazuk <br />Environmental Manager <br />Sent by Certified Mail <br />4- l - /I <br />Climax Mine <br />Highway 91 - Fremont Pass <br />Climax, CO 80429 <br />Phone (719) 486 -7718 <br />Fax (719) 486 -2251 <br />4P 27 2012 <br />„/,„ DIVISION OF RECLAMATION <br />` 1) MINING AND SAFETY <br />RE: Spoil/Muck Disposal Area Location Addendum to Technical Revision 21— Mayflower <br />Flood Bypass Tunnel and Mayflower TSF Reclaim Water System Modification <br />This letter and attachment (Drawing C -01) is an addendum to Technical Revision (TR) 21 — <br />Mayflower Flood Bypass Tunnel and Mayflower TSF Reclaim Water System Modification. As we <br />discussed over the phone last week, the addendum shows a new area to dispose of spoils /muck from <br />the Mayflower Bypass Tunnel construction. The original C -01 drawing in TR -21 had the main <br />spoil /muck disposal area along the west shore of Mayflower TSF in the general area of a riser pipe <br />that discharges to the Tenmile drainage as part of the Climax water treatment system. To prevent <br />potential water quality concerns with turbidity entering the riser pipe, Climax has added a new area <br />at the southeast corner of Mayflower TSF for the spoil /muck disposal. This new area is much farther <br />from the riser pipe and provides an additional safeguard to protect water quality. The new area <br />shown on revised C -01 also is larger than the actual area needed to place material. This gives <br />Climax flexibility for specific disposal areas based on ground conditions. The original disposal area <br />along the west shore of Mayflower TSF was kept because there may be some minor amount of <br />material placed there. <br />Please accept this letter and attachment as an addendum to TR -21 for your files, and please me call <br />with any questions. Climax also will maintain this information with our copies of TR -21. <br />