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5731 State Highway 13 4 Meeker, Colorado 81641 s 970- 824 -1200 <br />March 18, 2013 RECEIVED <br />Mr. Rob Zuber MAR 19 2013 <br />Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining and Safety Division of Reclamation, <br />Department of Natural Resources Mining & Safety <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />RE: Colowyo Coal Company, Permit No. C -81 -019, TR -95 — revision of <br />hydrologic methods, Third adequacy letter response <br />Dear Mr. Zuber, <br />Colowyo received your letter dated January 22, 2013 and has provided responses <br />to your comments. Colowyo has included the full text of the Division's letter <br />below for ease of review, and provided specific responses to the Division's <br />questions at the appropriate locations. Colowyo's responses are represented by <br />the red italicized text, while the Division's original text is bold black. <br />Dear Mr. Tennyson: <br />Regarding your second adequacy letter response (dated December 13, 2012 <br />and received by the Division on December 17, 2012), I have the following <br />comments and questions. The Division's decision on TR -95 is pending <br />answers to several questions (italicized in this letter). The first four headings <br />correspond to the comment numbers in previous adequacy letters. <br />COMMENT #1 <br />The Division recognizes that Colowyo is not requesting changes to the curve <br />numbers in the SEDCAD hydrologic model for areas reporting to the <br />Prospect Pond; Colowyo is only requesting changes to curve numbers for <br />other areas of the mine site. In the adequacy response letter of December 13, <br />2012, Colowyo states that, "The issues encountered within the Prospect <br />Drainage have been unique to the Prospect Drainage and are not applicable <br />across the balance of the mining operation." Please elaborate on what makes <br />Prospect unique. <br />Colowyo's Response: <br />A mining property of Western Fuels - Colorado, A Limited Liability Company <br />