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Colowyo Coal Company <br /> 5731 State Highway 13 <br />~' Meeker, CO 81641 <br />y <br /> <br /> <br />Q 15 July 2009 <br />Ms. Jennifer Maiolo <br />Bureau of Land Management <br />455 Emerson Street <br />Little Snake Office <br />Craig, Colorado 81625 <br />RE: CDRMS Decision to Approve Technical Revision No. 73 (TR-73). <br />"Methodologies and Assumptions for Sediment Pond Design Evaluations" provided <br />in Volume 2D in regard to future hydrologic designs. Colowyo Coal Mine, Permit No. <br />C-81-019. <br />Dear Ms. Maiolo, <br />Colowyo submitted one revision to our permit,-identified as TR-73, which was approved by <br />Colorado Division of Reclamation, Mining, and Safety (CDRMS) on 23 June 2009. <br />Enclosed you will find one (1) copy of the revision containing the revised text and <br />associated permit documents. <br />Enclosed you will also find the CDRMS approval letter, the Decision Form, a copy of the <br />public notice, and a change of index sheet to assist with the incorporation of this revision <br />into the BLM's copy of the Permit. <br />If you have any questions or require additional information, please do not hesitate in <br />contacting me at (970) 824-1578. <br />Sincerely, <br />Ryan Pawlowski <br />Environmental Engineer <br />Encl. 1 copy <br />Cc: file CF 1.1.2.62 <br />Jim Stark, CDRMS (w/o attachments)