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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 />September 17, 2013 <br />John Cochran <br />Peabody Energy <br />3001 W. Shamrell Blvd., Suite 110 <br />Flagstaff, AZ 86001 <br />RE: Yoast Mine, Permit C- 1994 -082 <br />CO- 0000221 2nd Quarter 2013 Discharge Monitoring Report Review <br />Dear Mr. Cochran, <br />COLORADO <br />ID IV I S I O N O F <br />RECLAMATION <br />MINING <br />SAFETY <br />John W. Hickenlooper <br />Governor <br />Mike King <br />Executive Director <br />Loretta Pineda <br />Director <br />The Colorado Division of Reclamation, Mining and Safety (CDRMS) has reviewed and found the above <br />referenced report to be in compliance with Rule 4.05.13(2). The 2nd Quarter 2013 Discharge Monitoring <br />Reports were received by the Division on July 30, 2013; the report covers the time period from April 1, <br />2013 through June 30, 2013. <br />The report indicated outfalls 011, 013 and 014 discharged this quarter. Two excursions of the NPDES <br />limitations were reported for the Yoast Mine during this quarter. The first involved the total recoverable <br />iron value from outfall 011 on April 29, 2013. The report included lab results of the sample taken at this <br />outfall and a copy of the notification e -mail submitted to the Colorado Department of Health and <br />Environment ( CDPHE) notifying them of the exceedance. The e -mail indicated that this exceedance is <br />likely due to spring snowmelt. <br />The second exceedance involved the pH limit at outfall 013 on May 2, 2013. The report includes a copy <br />of the notification e -mail sent to the CDPHE notifying them of this exceedance. The e -mail indicates <br />this exceedance is likely due to algae and is likely an upset event given that the cause of the exceedance <br />can be identified and that the pond is being properly maintained and operated. <br />If you have any questions, please feel free to contact me at (303) 866 -3567 ext. 8120. <br />Sincerely, <br />gy <br />Jared Ebert <br />Environmental Protection Specialist <br />Cc: Roy Karo, Seneca Coal Company <br />Office of Office of <br />Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines <br />