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71P 1/ <br />Whetstone <br />Whetstone Associates, Inc. <br />243 N Main St. <br />Gunnison, Colorado 81230 <br />M - /,? 7 7- hod <br />Mr. David Bird <br />January 14, 2010 <br /> <br />Department of Natural Resources <br />JAN '19 ZU1U <br />Division of Mining, Reclamation and Safety Division of Neciamation, <br />1313 Sherman Street, Room 215 Mining and Safety <br />Denver, Colorado 80203 <br />RE: Request for Extension for Submittal of Revised Environmental Protection Plan <br />(EPP) for Cotter Schwartzwalder Mine <br />Dear Mr. Bird, <br />On behalf of Cotter Corporation, this response has been prepared per your letter dated October <br />21, 2009 concerning revision of the Environmental Protection Plan (EPP) for the Schwartzwalder <br />Mine. The indicated due date for a revised EPP or extension request is January 19, 2010. <br />Whetstone Associates is currently in the process of revising the EPP, per your requirements. As <br />part of that revision, Cotter Corporation is considering potential groundwater mitigation <br />strategies. As your letter acknowledged, the scope of EPP modifications are substantial and <br />require additional data compilation, engineering, cost estimating, and consideration. We would <br />appreciate DRMS granting an additional 90 days for the preparation and submission of the <br />revised EPP. <br />Sincerely, <br />Whetstone Associates, Inc. <br />4 <br />Susan A. Wyman, P.E., P.G. <br />Principal Hydrologist / Civil Engineer <br />cc: Randy Whicker, Cotter Corporation <br />Craig Harlin, RGR <br />File: 4109C.100114