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In summary, the impact of mining on the ground water hydrologic system will <br />be minimal, primarily because of the limited amount of ground water which is <br />naturally found in the area. <br />No significant cumulative hydrologic impacts are expected as a result of the <br />mining activities at Deserado Mine. The Division fords, in accordance with <br />C.R.S. 34-33-114(2)(c) and Rule 2.07.6(2)(c), that the operation has been <br />designed to prevent material damage outside the permit area. <br />III. Sealing of Drilled Holes and Underground Openings <br />Underground openings requiring sealing at the mine include mine portals, groundwater <br />monitoring wells, and vent degasification wells. Bxcept for wells transferred to BLM <br />control and openings required for ventilation of the abandoned mine, all other holes or <br />openings will be permanently sealed at the end of their useful functions. <br />of the permit rrn~;rarino nac4a oe disCnssOS sPalino and abandOlunent Dlalis In 0ta11.F <br />Division <br />IV. Coal Mine Waste Banks <br />be <br />Information pertaining to the handling and disposal of coal processing waste generated <br />by the mining operation is presented in Section ]V.D. of the permit application. <br />Map 76 shows the location of the 11 refuse disposal areas to be developed over the life <br />of the mine. Map 77A shows the configuration of the first five subareas to be <br />developed. Refuse areas 1-4 were developed during previous permit terms. Refuse <br />area 1 has been reclaimed, and refuse area SA is under construction as this Findings <br />Document is being is <br />shown on Ma 81. <br />was es rs provr ed <br />Coal Processing Waste Disposal <br />The permittee is disposing of coal processing wastes and mine development wastes in <br />refuse piles located in the northeastern section of the mine plan area. This area is <br />moderately sloping with the average slope of the profile of the valleys from the toe of <br />the proposed fill to the top of the proposed fill being less than 10 degrees. No springs <br />or perennial water courses exist in the area and ground water was not detected down to <br />44 feet. Coal processing wastes, amounting to approximately 450,000 tons per year, <br />will consist of roof and floor rock, interburden and some coal. The development <br />waste is material excavated during the construction of portals and entries to the mine. <br />The wastes do not contain quantities of toxic- or acid-forming materials to create an <br />acid or toxic leachate. This determination is based on the results of overburden <br />analysis of waste material submitted to the regulatory agencies during the permit <br />review period. <br />20 <br />