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-58- <br />~:: <br />FURTHER, WEST ELK COAL COMPANY; UTILIZING THE FINDINGS OF THE FINAL <br />GEOTECHNICAL INVESTIGATION, SHALL COMPLETE A FINAL ENGINEERED CUT-SLOPE <br />AND DRAINAGE DESIGN FOR THE UPPER WASTE PILE ACCESS ROAD. THIS FINAL <br />.DESIGN SHALL BE APPROVED BY THE DIVISION, IN WRITING, AND THE <br />CONSTRUCTION COMPLETED IN ACCORDANCE WITH THAT DESIGN, PRIOR TO THE <br />TRANSPORTATION OF ANY WASTE MATERIAL ALONG THAT ACCESS ROAD. <br />XXI. Bonding (2.05.4(2)(b) <br />The reclamation costs section of the permit application, found on pages <br />4-34a through j of .Volume 1, has been reviewed by the Division. All <br />problems concerning the reclamation cost estimates that were raised in <br />the February 6, 1981 Preliminary Adequacy Review have been <br />satisfactorily resolved and the proposed operation is in compliance. <br />The total cost for reclaiming the operation has been calculated by <br />WECC to be b4,106,639.00. <br />XXII. Sealing of Drilled Holes and Underground Openings (2.05.4(2)(8), 4.07 <br />Information demonstrating compliance with the above mentioned rules can <br />be found in Volume 1, section 3 and 4. The operation is in compliance. <br />XXIII. Subsidence (2.05.6(6), 4.20) <br />WECC prepared, submitted and subsequently revised a report entitled <br />"Subsidence Evaluation for Mt. Gunnison No. 1 Mine". This report was <br />prepared by WECC's Mine Engineering Staff and included as exhibit <br />3.4.8.A within the amended permit application. <br />As a portion of its November, 1984, "Application to Revise the Mining <br />and Reclamation Plan for the Mt. Gunnison No. 1 Mine", WECC submitted <br />revised subsidence monitoring plan. WECC states in the application <br />that the requested 320 acre permit area expansion "...is, in part, to <br />accommodate a revision to the underground mining sequence necessitated <br />by geologic conditions encountered during mining which required that <br />the mains be relocated". Further, the requested area expansion will <br />allow the relocation of the required subsidence test panel. WECC <br />observes, and the Division concurs, "Relocating the five year permit <br />boundary westward will permit a 400 foot barrier pillar width <br />(adjoining the mains) and a subsidence test panel in excess of 500 <br />feet. The wider barrier pillar will reduce the possibility of <br />overriding loading on the life-of-mine mains being developed in the <br />area." <br />WECC originally proposed a basic subsidence control scenario <br />emphasizing data collection during the first five-year permit period. <br />The results of the first five year's collection will then be utilized <br />to finalize design of subsidence control specifics in later permit <br />periods. WECC acknowledges that subsidence will occur <br /> <br />