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III IIIIIIIIIIIIIIII RECEivE® <br />999 <br />AUG 2 3 1991 <br />Mined Land <br />KEEGAN COI~ISTR(]CTIOPI & CONSCILTII`IG Reclamation Div <br />I NUCHAEL T. KEEGAN <br />STAR RT. 3 BOX 60, PAGOSA SPRINGS, CO 81147 ~ TELEPHONE (303) 7315055 <br />c ~ ~~~K <br />Mr. Harry Ranney August 21, 1941 <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 ha rd ,fast event. No main iterceptor ditches failed, but the erosion control <br />fabric in ditch 3-D tore the entire Tenth of the ditch. Af 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 have 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 />Michae3 T. Keegan <br />Project Consultant <br />cc Gerry Fawcett <br />Greystone Development Consultants <br />