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<br /> <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us <br />John W. Hickenlooper, Governor | Bob Randal, Executive Director | Virginia Brannon, Director <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br /> <br /> Inter Office Memorandum <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />RE: New Horizon North; C2010089 <br />Technical Revision, TR16 <br /> <br /> <br />I was requested to assess the above referenced permit revision with respect to the NHN 002 <br />North Ditch design, for adequacy and compliance with Rules 4.05.5 Sediment Control Measures <br />and 2.05.6(3), Protection of the Hydrologic Balance. <br /> <br />My review of the maps and associated documents follow. <br /> <br />DRMS notes that as per Map 2.05.3(4)-9 and associated text the North Ditch should adequately pass the <br />10 year 24 hour storm event for the area as per Rule 4.05.5. Ditch slope and channel width are <br />adequately designed. <br /> <br />The information provided is adequate. <br /> <br />Please let me know of any questions and concerns that come up. <br /> <br />Thank you <br /> <br /> Robin Reilley, M.S; GISP <br />Environmental Protection Specialist <br />To: Brock Bowles, DRMS <br />From: Robin Reilley, M.S; GISP, DRMS <br />Date: 26 June 2018