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<br />I. Dischazge of Water into an Underground Mine <br />No specific approvals are granted under this section. <br />Stream Buffer Zones <br />.. <br />The Division proposes to approve surface or underground mining activities <br />within 100 feet of a perennial scream or stream with a biological community. <br />This decision is based on a finding that the original stream channel will be <br />restored, water quality and quantity shall not be adversely affected, and <br />appropriate riparian vegetation will be reestablished. The buffer zone variance <br />is granted for the areas located along Lorencito Canyon where the haul road, <br />access road, or P1/P2 portal facilities aze adjacent to the Lorencito stream <br />channel. (4.05.18(1)) <br />IV. Topsoil <br />A. The Division proposes to waive the requirement for clearing of vegetation cover <br />prior to topsoil removal on aeeas that will be treated using the Rotoclear machine. <br />The applicant has demonstrated that inclusion of vegetation cover in salvaged <br />topsoil is necessary or desirable to ensure soil productivity consistent with the <br />post-mining land use (4.06.2(1)). <br />B. The Division is proposing to grant a variance from topsoil removal in accordance <br />with Rule 4.06.2(2)(a). For those areas of the surface mine where the slopes <br />exceed 50%, the operator will not be required to strip topsoil. This is necessary <br />due to the fact that soil in these areas is of marginal quality and thickness, and <br />equipment limitations and safety considerations make topsoil salvage on slopes <br />steeper than 50% highly undesirable. <br />C. The Division has determined selected overburden materials shall be used for, or as <br />a supplement to topsoil. The resulting soil is equal to or better than the available <br />topsoil. This determination is based on physical and chemical analyses and <br />field-site trials approved by the Division (4.06.2(4)(a)). The applicant has provided <br />physical and chemical analysis in Exhibit 6. However, at the present time, the <br />applicant has committed to re-apply a minimum of .9 feet of topsoil over all <br />disturbed areas. Therefore, it is no likely that supplement materials will be utilized <br />given the present reclamation plan. <br />V. Sealing of Drilled Holes and Underground Openings <br />A. The applicant has not proposed to manage development, exploration, drill or bore <br />holes, wells or other exposed underground openings in a manner other than by <br />24 <br />