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iii iiiiiiiiiiiiiii <br />RE~EIVEC <br />AUG 2 3 1991 <br />& CONS(1LT1NG <br />Mined Land <br />MICHAEL T. KEEGAn <br />STAR RT. 3 BOX 60, PAGOSA SPRIfVGS, CO 81147 ~ TELEPHOfVE (303) 731 5055 <br />Mr. Harry Ranney August 21, 1991 <br />Mined Land Reclamation Division <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />RE: Failure of erosion control fabric in ditch 3-D <br />Dear Mr. Ranney <br />On August 14, 1991 we experianced a precipitation event of ,62 inches, This wds <br />a very hard ,fast event. No main iterceptor ditches failed, but the erosion control <br />fabric in ditch 3-D tore the entire Tenth of the ditch. At this time, the plan is <br />to replace the fabric with river rock rip-rap with a D,50 of 24", As you can under- <br />stand, this repair will take some time to implement. In the meantime I will be con- <br />tacting the manufacturer of the fabric to see if this could (lave just been a flaw <br />in the fabric. We also experianced some minor breaches in the contour furrows on <br />the Eastside Reclaimed area, and the Barrin Ridge. These breaches were repaired <br />during our annual maintenance of the furrows. None of the ponds recieved enough <br />water to discharge. If you have any questions please don't hesitate to contact me. <br />Sincerely <br />Michael T. Keegan <br />Project Consultant <br />cc Gerry Fawcett <br />Greystone Development Consultants <br />