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W Climax Molybdenum COLORADO OPERATIONS <br />Henderson Mill <br />P.O. Box 68 <br />A Freeport-McMoRan Company Empire, CO 80438 <br />Phone (303) 569-3221 <br />Fax (303) 569-2830 <br />June 23, 2010 <br />RECEIVE <br />Via Email and UPS Tracking #: 1Z 804 847 03 6435 6121 AJ*U N 2 4 201') <br />Mr. Allen C. Sorenson DMsion or nccs °E« °?. <br />Mining and Sz'ettl <br />Division of Reclamation, Mining and Safety <br />1313 Sherman St., Rm. 215 <br />Denver, CO 80203 <br />Re: Permit M-1977-342, TR-09, 2-Dam Decant Grouting and 3-Dam See Water Management, <br />Henderson Mill <br />Dear Mr. Sorenson: <br />Climax Molybdenum Company (CMC) is pleased to provide the following information related to Technical <br />Revision 09 (TR-09) of the Henderson Reclamation Permit. CMC is in the process of reviewing its DRMS <br />permit files to make sure that all associated commitments have been met and that the related files, <br />correspondence and authorizations are complete. As is practicable, our goal is to obtain written <br />confirmation that obligations associated with each of our technical revision and permit amendment files <br />have been satisfied. We believe this will prove useful to both CMC and DRMS, and we appreciate your <br />assistance with this effort. <br />CMC submitted the request for TR-09 on April 11, 2000 (see attachment 1) and DRMS subsequently <br />granted CMC conditional approval on April 27, 2000 (see attachment 2). The purpose of TR-09 was to <br />grout a portion of the abandoned 2-Dam Decant System and to install parallel gravity lines to route No. 3- <br />Dam seepage to the No. 1-Dam seep water collection system. The conditions imposed by DRMS were in <br />the form of the following stipulations. <br />Stipulation #1 <br />Stipulation <br />The 3-Dam seepage pipelines will not be put into service until the Division has issued written <br />acceptance of the certification of the facility as required under Rule 7.3.2(2) of the Hard RocWMetal <br />Mining Rules and regulations. The certification shall be accompanied by a construction report that will <br />detail the installation of the pipelines, including pipe and valve specifications, a description of the inlet <br />structures, seepage barriers and south dike reconstruction, a description of any problems that occurred <br />and their resolution, and a description and test results of pipeline integrity testing. <br />Completion <br />Henderson provided DRMS with final certification in a letter dated January 12, 2001 (see attachment 3). <br />DRMS provided the go-ahead to remove the old 3-Dam pump station concurrently with finalization of <br />the seepwater project in a memo dated May 9, 2001 (see attachment 4). <br />Subsequently, in a letter dated April 11, 2002, CMC requested approval from DRMS to relocate the 3- <br />Dam seepwater discharge point from just upstream of the Ute Park Station seepwater inlet to the head