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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 />October 14, 2010 <br />Brian A. Watterson <br />Twentymile Coal Company <br />29515 Routt County Road #27 <br />Oak Creek, CO 80467 <br />RE: Twentymile Coal Company, Permit C-82-056 <br />Third Quarter Sediment Pond Inspection Report 2010 <br />Dear Mr. Watterson, <br />COLORADO <br />D IV IS I ON OF <br />RECLAMATION <br />MINING <br />SAFETY <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 third quarter sediment pond inspection reports were received by the Division on 13 October 2010. <br />Sediment pond inspections were conducted by TCC during the last week of September 2010. <br />It is noted that maintenance items required include; clearing cattails at Pond C and the addition of <br />flume at 6MN Pond. <br />Maintenance items addressed include; vertical riser and horizontal culvert replaced at pond E, ditch <br />improvement and gage replacement at pond G, cattails cleared at pond T, vertical riser, horizontal <br />culvert and v-notch weir replaced at FCT pond, <br />The waste water treatment pond #1, #2, #3, final polishing pond, pond B, pond D, pond G, and the Fish <br />Creek Tipple 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 />C 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