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STATE OF COLORADO <br />DIVISION OF RECLAMATION, MINING AND SAFETY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866-3567 <br />FAX: (303) 832-8106 <br />December 18, 2007 <br />COLORADO <br />D IV IS I ON OF <br />RECLAMATION <br />MINING <br />SAFETY <br />Ms. Amy Thurlkill <br />Manager of Environmental, Health, and Safety <br />Cotter Corporation <br />7800 E. Dorado Place, Suite 210 <br />Englewood, CO 80111 <br />Re: Cotter Corporation - Schwartzwalder Mine, Jefferson County - <br />No. TR-09; Permit No. M-1977-300 i-- <br />Dear Ms. Thurlkill: <br />Bill Ritter, Jr. <br />Governor <br />Harris D. Sherman <br />Executive Director <br />Ronald W. Cattany <br />Division Director <br />Natural Resource Trustee <br />Technical Revision Approval, Revision <br />On December 14, 2007, the Division of Reclamation, Mining, & Safety (Division) approved the Technical Revision <br />application filed with the Division on December 7, 2007 that addresses the following: <br />Hydrologic Sealing of Steve Level Adits <br />The terms of the Technical Revision No. 9 approved by the Division are hereby incorporated into Permit No. M-1977- <br />300. All other conditions and requirements of Permit No. M-1977-300 remain in full force and effect. <br />Because hydrologic seals are already included in the approved Reclamation Plan on file, and the seals in TR09 represent <br />an optional upgrade that are a contingency in the event that the mine pool rises to a level that the hydrologic study <br />indicates is unlikely, DRMS has decided that no additional Financial Warranty is necessary at this time. However, <br />DRMS retains the option to impose additional Financial Warranty on the TR09 seals in the event that installation of the <br />seals is not completed within a reasonable time period. <br />The approval of TR 09 is contingent upon the receipt of one additional item. In accordance with Rule 1.8.1(2), the <br />Operator must provide the Division with an affidavit or receipt demonstrating that the amendment or technical revision <br />was placed with the County Clerk and Recorder. To date the Division has not received this. <br />If you have any questions, you may call me at (303) 866-3567. <br />Sincerely, <br />l <br />aA <br />David A. Bird <br />Environmental Protection Specialist, Senior Geochemist <br />Office of Office of <br />Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines