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3e- ~~ AususT , IYaI F~ND,~~~ <br />~iNOruGS pocumc.~7r-1951 FoLOE.I~ <br />'~. A TIMELY FASHION TO COMPLETION 8Y DECEMBER 31, 1982. THE DIVISION <br />~:_ SHALL BE KEPT INFORMED BY MONTHLY LETTER OF THE PROGRESS OF THIS TASK <br />BY THE OPERATOR. UPON COMPLETION OF PHASE III, THE RECLAMATION PLAN <br />SECTION OF THE ORCHARD VALLEY MINE PLAN SHALL BE APPROPRIATELY AMENDED. <br />XVIII. COAL <br />Colorado Westmoreland, Inc. (CWI) is currently disposing of non-coal processing <br />waste at the Delta County Landfill. CWI proposes to continue this practice. <br />CWI's plan for non-coal processing waste disposal is in compliance with the <br />regulations. <br />CWZ currently disposes of coal processing waste at a small (6 acre) site <br />below the large fill which comprises the crushing and screening level at <br />the downgrade boundary of the Orchard Valley mine's surface facilities area. <br />Historically, waste has been generated at very Zow rates resulting in an <br />accumulation of only several thousands yards J to date. The Division did <br />not consider the presentation supporting con tir.ued use of the existing fill <br />adequate to satisfy the requirenents of the regulations, CWI was instructed <br />in the preliminary adequacy review to complete an appropriate geogechnical <br />investigation and stability analysis for the proposed disposal site and <br />structure. <br />CWI has retained the services of Merrick 6 Company and Geohydro Consultants <br />to study the slope stability of the entire surface facilities area at the <br />Orchazd Valley mine. One portion of this project involves the investigation <br />'~% of alternate sites for the proposed coal processing waste pile and the design <br />of an acceptable waste pile. Phase I of this study was completed and a summary <br />report by Geohydro Consultants submitted to the Division for review on July <br />21, 1981 (see volume 10, Stability Analysis). The analysis has been perforrm d <br />in accordance with .the prudent state-of-the-art of stability analysis and is <br />acceptable. Phase I determined that the proposed site for the waste pile was <br />not a desirable Iocation and the-"consultants have recommended the investi- <br />gation, to occur during Phase II of this study, of several alternate sites. <br />Phase III of this investigation includes the design of an acceptable coal <br />processing waste disposal structure which will conform with the regulatory <br />requirements of Rule 4.10. <br />In order to assure compliance with the pertinent regulations, the Division <br />finds that the following stipulations need to be placed upon approval of <br />the permit: <br />COLORAAO WESTMORELAND, INC. IS DIRECTED TO COMPLETE PHASE II OF THE GEO- <br />TECHNICAL AND STABILITY ANALYSES OF ZTS SURFACE FACILITIES AREA AT THE <br />ORCHARD VALLEY MINE, AS OUTLINED IN THE VARIOUS LETTERS OF PROPOSAL <br />FROM MERRICK & COMPANY AND GEOHYDRO CONSULTANTS INCLUDED IN VOLUME 10 <br />OF THE AMENDED APPLICATION. PHASE II OF THIS STUDY INCLUDES AN ANALYSIS <br />OF ALTERNATE PROPOSED SITES~FOR'A COAL PROCESSING WASTE PILE AT THE <br />ORCHARD VALLEY MINE. THE SCOPE OF PHASE IZ SHALL INCLUDE TEST DRILLING <br />AND ESCAVATION OF TEST PITS, THE INSTALLATION OF APPROPRIATE WATER <br />QUANTITY AND QUALITY MONITORING WELLS, THE PERFORMANCE OF VARIOUS ROCK <br />~~ AND SOIL TESTS, AND THE PERFORMANCE OF A SERIES OF STABILITY ANALYSES <br />