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<br />quality of the receiving waters as the volume of the runoff will be <br />extremely low. No material damage to receiving waters is expected. <br />Post-mining contours and revegetation are expected to reduce runoff <br />and erosion below current conditions, thereby reducing potential <br />impacts after reclamation. This reduction will result from <br />increased infiltration and evapotranspiration due to reduced rates <br />of overland flow during higher precipitation and snowmelt events, <br />and increased vegetative cover. Surface water monitoring will <br />adequately characterize runoff quality and quantity so that <br />changes, if any, will be detected and potential impacts can be <br />calculated. <br />An analysis of Probable Hydrologic Consequences of the Hamilton <br />Mine has been supplied with the application, in accordance with <br />Rule 2.05.6(3). Any impacts which may occur are not expected to <br />impact the hydrologic balance of the area. The operations as <br />proposed have been designed to prevent material damage to the <br />hydrologic balance outside the permit area. Appropriate measures <br />are outlined in the application to ensure protection of surface and <br />ground waters in the permit and adjacent areas from adverse effects <br />due to the proposed mining operations. <br />II. Topsoil <br />The Division proposes to waive the requirement for clearing of <br />vegetation cover prior to topsoil removal in most areas since the <br />vegetation cover consists of grasses, fortis and small shrubs. The <br />applicant has demonstrated that inclusion of vegetation cover in <br />salvaged topsoil is necessary or desirable to ensure soil <br />productivity consistent with the post-mining land use. (4.06.2(1)). <br />III. Sealing of Drilled Holes and Underground Openings <br />The Division will require that each hole, well or other underground <br />opening be capped, sealed, backfilled, or otherwise properly <br />managed. (4.07.3). <br />IV. Backfilling and Grading <br />1. The Division proposes to approve the applicant's plan for disposal <br />of acid-forming materials, in a manner designed to prevent <br />contamination of ground or surface waters. A contingency plan has <br />also been developed to prevent sustained combustion of flammable <br />materials. (4.14.3(1)(a)). <br />2. The Division proposes to approve the method and design <br />specifications for covering of acid and toxic-forming materials in <br />order to prevent leaching into surface and ground water and to <br />insure backfill stability. (4.14.3(2)). <br />_19_ <br />