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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 16, 2011 <br />Mr. Chip Brown <br />Colowyo Coal Company <br />5731 State Highway 13 <br />Meeker, CO 81641 <br />RE: Colowyo Mine, Permit C- 1981 -019 <br />Review of First Quarter 2011 Discharge Monitoring Reports <br />for CDPHE Permit No. CO- 0045161 <br />Dear Mr. Brown: <br />The Colorado Division of Reclamation, Mining and Safety (the Division) has reviewed and found the above <br />referenced report to be in compliance with Rule 4.05.13(2). The Discharge Monitoring Reports were received <br />by the Division on April 7, 2011. The reports cover the time period from January 1, 2011 through March 31, <br />2011. <br />Five CDPS outfalls discharged during the first quarter of 2011: Outfalls 001, 002, 003, 005, and 007. <br />Colowyo's surface water monitoring activity revealed one exceedance of a primary effluent limitation during the <br />quarter. At Outfall 007A (Prospect Pond), Total Recoverable Iron was found to exceed the 30 -day average <br />concentration of 1.0 mg/L on March 1, 2011. The measured value was 2.83 mg/L. However, evidence provided <br />by Colowyo to the Division (photographs and temperature data) suggests that the runoff during this exceedance <br />was due to snowmelt. Furthermore, the alternate limitation for settleable solids was met. The Colorado <br />Department of Public Health and Environment was informed of the exceedance. The Division requests no <br />further action on this matter. <br />If you have any questions feel free to contact me at 303 - 866 -3567 (ext. 8113). <br />Sincerely, <br />Robert D. Zuber, P.E. <br />Environmental Protection Specialist <br />Cc: Janet Binns, DRMS <br />STATE OF COLORADO <br />COLORADO <br />D I V I S I O N O F <br />RECLAMATION <br />MINING <br />— &— <br />SAFETY <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 />