2011-09-30_REVISION - M1977342 (7)

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_ i Climax Molybdenum June 23, 2010 Via Email and UPS Tracking #: 1Z 804 847 03 6435 6121 Mr. Allen C. Sorenson Division of Reclamation, Mining and Safety 1313 Sherman St., Rm. 215 Denver, CO 80203 Re: Permit M- 1977 -342, TR -09, 2 -Dam Decant Grouting and 3 -Dam Seep Water Management, Henderson Mill Dear Mr. Sorenson: Climax Molybdenum Company (CMC) is pleased to provide the following information related to Technical Revision 09 (TR -09) of the Henderson Reclamation Permit. CMC is in the process of reviewing its DRMS permit files to make sure that all associated commitments have been met and that the related files, correspondence and authorizations are complete. As is practicable, our goal is to obtain written confirmation that obligations associated with each of our technical revision and permit amendment files have been satisfied. We believe this will prove useful to both CMC and DRMS, and we appreciate your assistance with this effort. CMC submitted the request for TR -09 on April 11, 2000 (see attachment ' 1) and DRMS subsequently granted CMC conditional approval on April 27, 2000 (see attachment 2). The purpose of TR -09 was to grout a portion of the abandoned 2 -Dam Decant System and to install parallel gravity lines to route No. 3- Dam seepage to the No. 1 -Dam seep water collection system. The conditions imposed by DRMS were in the form of the following stipulations. Stipulation #1 A Freeport - McMoRan Company COLORADO OPERATIONS Henderson Mill P.O. Box 68 Empire, CO 80438 Phone (303) 569 -3221 Fax (303) 569 -2830 SEPOR2011 Division of Reclamation, Mining and Safety Stipulation The 3 -Dam seepage pipelines will not be put into service until the Division has issued written acceptance of the certification of the facility as required under Rule 7.3.2(2) of the Hard Rock/Metal Mining Rules and regulations. The certification shall be accompanied by a construction report that will detail the installation of the pipelines, including pipe and valve specifications, a description of the inlet structures, seepage barriers and south dike reconstruction, a description of any problems that occurred and their resolution, and a description and test results of pipeline integrity testing. Completion Henderson provided DRMS with final certification in a letter dated January 12, 2001 (see attachment 3). DRMS provided the go -ahead to remove the old 3 -Dam pump station concurrently with finalization of the seepwater project in a memo dated May 9, 2001 (see attachment 4). Subsequently, in a letter dated April 11, 2002, CMC requested approval from DRMS to relocate the 3- Dam seepwater discharge point from just upstream of the Ute Park Station seepwater inlet to the head