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COLORADO <br /> <br />WESTMORELAND INC. <br />III {II~II~II~~II~II <br />sss <br />P.O. Box 1299 Paonia, Colorado 8'1428 ~ 303-527-4135 <br />31 May 1988 <br />Ms. Catherine W. Begej, Reclamation Specialist <br />Colorado Mined Land Reclamation Division <br />215 Centennial Building <br />1313 Sherman Street <br />Denver, CO 80203 <br />Re: Orchard Valley West Mine - Slide Repair <br />Dear Cathy: <br /> <br />JUN 2 }988 <br />MINED LAP:D <br />[~ECLAMATIDN C~\~1$101~ <br />As you know, a small slump developed in the north cut slope of the Orchard <br />Valley West Mine site this Spring. This slide is approximately 90 feet long and <br />30 feet wide. The slide dropped down approximately four feet onto the terrace <br />located midway down the cut slope and appears to have stabilized. No seepage or <br />flow from the slide is evident. <br />The Division has inspected the slide, both from the air and on the ground, and <br />set a deadline of June O1, 1988, for the submittal of a repair plan. The <br />following is CWI's proposed plan for the management of the slide. <br />As mentioned above, the slide appears to have stabilized on the terrace. The <br />terrace is only five feet wide in this area and would not be enough width for <br />equipment to access the site. If the toe of the slide were removed, this work <br />would have to be done by hand and would probably cause the remaining slide body <br />to s1L~p down onto the terrace. Removal of the entire slide body would leave a <br />steep and probably unstable high wall in the cut slope. <br />Instead of disturbing the stabilized slide, CWI proposes to divert drainage on <br />the terrace from the slide toe area. This would be achieved by digging a small <br />ditch by hand across the terrace just west of the slide to intercept any flows <br />which may be draining on the terrace from the west. This drainage would be <br />directed over the outslope. <br />A slight depression was formed were the soils had slLmmped in the center portion <br />of the slide. To avoid puddling of rainfall and further saturation of the <br />slide, CWI proposes to place a plastic liner in the depression and drain any <br />accLnnulations away from the slide. <br />CWI proposes [o complete this work by August O1, 1988. Please don't hesitate to <br />contact me should you have any questions. <br />Sincerely, <br />COLORADO IdESTMORELAND INC. <br />~ ~---~~~ <br />Kathleen G. Welt <br />iUB5i 0 i4 Rr OF Environmental Specialist <br />:ESTMOREL4N^ <br />:04L COMR4NY 1((~'k1 <br />