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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 />February 16, 2010 <br />Mr. Vern Pfannenstiel <br />Manager Environmental Services <br />Peabody Energy Corporation <br />3001 West Shamrell Boulevard, Suite 110 <br />Flagstaff, AZ 86001 <br />Re: Peabody Sage Creek Mine (C-2009-087) <br />Preliminary Adequacy Review of Permit Application <br />Dear Mr. Pfannenstiel: <br />Additional adequacy review comments 55 and 56 are provided below. <br />COLORADO <br />DIVISION OF <br />RECLAMATION <br />MINING <br />SAFETY <br />Bill Ritter, Jr. <br />Governor <br />James B. Martin <br />Executive Director <br />55. Please revise section 2.05.6(6) of the permit application to include a subsidence <br />monitoring program, as required by Rule 2.05.6(6)(b)(ii). <br />56. Given the previously requested revisions to calculations of mine inflow and <br />drawdown, please re-evaluate the potential for mining impacts to affect gains in flow <br />in the upper reach of Grassy Creek as it is discussed on page 2.05-75 of the permit <br />application. <br />Please contact me if you have any questions. <br />Sincerely, <br /> <br />Tom Kaldenbach <br />Environmental Protection Specialist <br />cc: Dan Hernandez, DRMS <br />Office of Office of <br />Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines