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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 />September 27, 2011 <br />Mr. Donald MacDonald <br />Coors Energy Company <br />P.O. Box 467 <br />Golden, CO 80402 <br />Re: Keenesburg Mine, Permit No. C- 1981 -028 <br />Second Quarter 2011 Pond Inspection Report <br />Dear Mr. MacDonald: <br />The Division received Coors Energy Company's Second Quarter 2011 Pond Inspection report on September 20, <br />2011. The report indicates that CEC conducted inspections on June 23, 2011. <br />The Division has reviewed this report and did not find any cause for concern related to the ponds. No discharge <br />from any of the ponds was reported, and no structural issues were identified. Only two potential issues were <br />identified: the report indicates that vegetation at the sewage lagoon is inadequate and that there are burrow holes <br />at the Dugout Pond. However, as previously noted, the sewage lagoon poses no threat to public safety or <br />environmental health. The burrows at the Dugout Pond are acceptable as this is not an engineered embankment. <br />Thus, these potential maintenance issues are not considered problems. <br />This report meets the requirements of Rules 4.05.9(14) and 4.05.9(17). Thank you for your submittal. <br />Sincerely, <br />Robert Zuber, P.E. <br />Environmental Protection Specialist <br />(303) 866 -3567, ext. 8113 <br />STATE OF COLORADO <br />COLORADO <br />D I V I S I O N O F <br />RECLAMATION <br />MINING <br />— &— <br />SAE ETY <br />John W. Hickenlooper <br />Governor <br />Mike King <br />Executive Director <br />Loretta E. Pineda <br />Director <br />Office of Office of <br />Mined Land Reclamation <br />Denver • Grand Junction • Durango Active and Inactive Mines <br />