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Tay Tonoui <br />Sr. Environmental Engineer/ ~ , ~ ..~ <br />Land Manager `~' <br />PH: (970) 824-1579 Mqr ~~'~ <br />Fax: (970) 824-1598 ~~~, o (/ <br />Mss n o,~ 'y ~UUJ May 8, 2007 <br />Mr. James R. Stark ni~9a - <br />Environmental Protection Specialist nasate~ °~• <br />Colorado Division of Minerals and Geology <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver. CO 80203 <br />RE: Technical Revision No. 63, Revision to Postmining Topography Colowyo Coal Mine, Permit <br />No. C-81-019. <br />Dear Mr. Stark, <br />Enclosed please find three copies of materials provided to finish Technical Revision No. 63. Specifically, <br />this includes the three pages to Exhibit 7, Item 14, Table 1 and Map 41. Also enclosed is a tracking sheet for <br />this submittal. <br />If you have any questions or just require additional information, please don't hesitate in contacting me at the <br />phone number above. <br />Sincerely, <br />~~~' <br />Tay Tonozzi <br />Senior Environmental Engineer <br />Encl. 3 copies <br />Cc: file CF 1.1.2.52 2007 w\encl <br />Colowyo Mlne • 5731 State Highway 13 • Meeker, Colorado 81641 <br />T +1 970 824 1500 • F +l 970 824 1504 • www.rtea.com <br />