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Cc: Zuber, Rob <br />Subject: Request for Determination of Need for Mine Plan Modification <br />H i Foster — <br />We've recently received an application for a Technical Revision for the Colowyo Mine. The application proposes some <br />changes to the designs of a ditch on a refuse pile (copy of TR application cover letter attached). Would you mind letting <br />me know if you think this application rises to the level of a mining plan modification? <br />Thanks, <br />Dan <br />Daniel I. Hernandez <br />Senior Environmental Protection Specialist <br />Colorado Departmentof Natural Resources <br />Division of Reclamation, Mining and Safety <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />Ph: 303 - 866 -3567 Ext 8126 <br />http. us/ <br />