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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 />April 23, 2012 <br />Brian A. Watterson <br />Twentymile Coal Company <br />29515 Routt County Road #27 <br />Oak Creek, CO 84067 <br />RE: Twentymile Coal Company, Permit C -82 -056 <br />First Quarter 2012 Sediment Pond Inspection Report Review <br />Dear Mr. Watterson: <br />COLORADO <br />Q I V 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 E. Pineda <br />Director <br />The Colorado Division of Reclamation, Mining, and Safety ( CDRMS) has reviewed and found the <br />above referenced report to be in compliance with the following CDRMS regulation: <br />4.05.9(17) — Examined at least quarterly by a qualified person designated by the operator, for <br />appearance of structural weakness and other hazardous conditions. <br />4.05.9(17) — A copy of the report shall be submitted to the Division on a quarterly basis. <br />The first quarter sediment pond inspection reports were received by the Division on 19 April 2012. <br />Sediment pond inspections were conducted by TCC during the fourth week of March 2012. <br />The culvert from the sediment sump into Pond B was replaced during the quarter. <br />It is noted that no maintenance items were required or conducted, with the exception of clearing grass at <br />the flume of Pond B, additional concrete support at flume of Pond D, clearing grass around the flume of <br />Pond F, clearing cattails at Pond T, and additional aerator at Waste Water Pond 1. <br />The Waste Water Treatment Pond #1, #2, and #3, Pond D, Pond E, Pond B, and the Fish Creek Tipple <br />Pond were discharging at the time of the inspections. <br />If you have any questions feel free to contact me. (303) 866 -3567 ext 8134 <br />Sincerely, <br />Jason Musick <br />Environmental Protection Specialist <br />Office of Office of <br />Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines <br />