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- 3 - <br />Preliminary design recommendations have been prepared <br />and are presented in this report; as they are based on an <br />incomplete set of data, they will have to be verified and <br />reevaluated in the future as more accurate data will become <br />available. <br />In the near future, a ground water monitoring system <br />will be installed and geotechnical conditions of the site <br />evaluated in more detail; actual production of the mine <br />waste material will enable estimation of its properties and <br />verification of whether the assumptions of our analyses were <br />correct. <br />The method of study was developed during a meeting be- <br />tween representatives of the CMLRB, ARCO Coal Company, and <br />Geo-Hydro Consulting, Inc., at the offices of the CMLRB on <br />13 February, 1981. <br />1.4 PERTINENT REGULATIONS <br />ARCO Coal Company has agreed to design the initial waste <br />rock storage pile according to the requirements for coal pro- <br />cessing waste piles. Waste piles classified as coal process- <br />ing waste must be designed in accordance with the performance <br />standards of Rule 4.10 of the Regulation of the CMLRB for <br />Coal i4ining, Coal Processing Waste Banks. This rule specifies <br />requirements regarding surface and subsurface drainage, long- <br />term stability requirements, construction procedures, and <br />final reclamation requirements. The pertinent requirements are <br />detailed in the relevant sections of this report. <br />A program of monitoring and sampling of the waste rock <br />material will have to be undertaken from the start of con- <br />~EO++wRO coNSUmr~, iwc. <br />