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<br />~II II~II~I~~II~~ I~~ <br />STATE OF COLORAL~U <br />Roy Romer, Governor <br />DEPARTMENT OF NATURAL RESOURCES <br />MINED LAND RECLAMATION DIVISION <br />FRED R. BANTA, Director <br />play 24 , 1989 <br />Ms. Linda Limbach <br />Eastside Coal Company <br />P.O. Box 161 <br />Silt, CO 81652 <br />Re: Eastside Mine Permit No. C-84-063 TR-05 Redesign Of Ditches, Refuse <br />Disposal Area <br />Dear Ms. Limbach: <br />I have reviewed your calculations for the design of drainage ditches DD5 and <br />DD6. <br />It appears both these ditches will satisfy the minimum requirements to <br />accommodate peak discharge and runoff. As you stated in your design sketch <br />due to the steepness of the slope the drainaoe ditch DD6 will be riprapped to <br />decrease the velocity and prevent erosive action. <br />As long as this condition is met I do not anticipate any major problem. <br />If I ma-y be of any assistant Dlease do not hesitate to call. <br />Sincerely, <br />~.~~L <br />Berhan Keffelew <br />Reclamation Specialist <br />BK/lac <br />6513E <br />~~ <br />215 Centennial Building, 1313 Sherman Street Denver, Colorado 80203-2273 Tel. (303) 866-3567 <br />