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TAB 18 <br />XYD0.0LOGIC RECLAMATION PLAN <br />Introduction <br />The hydrologic reclamation plan is presented in two parts. The first part focuses on <br />specific practices which are conducted to minimize the impact of mining on the hydrologic <br />balance within and adjacent to the first five year block of mining proposed in the permit <br />area, The second part addresses those impacts that may occur regardless of these <br />practices. The emphasis of the second pert is on the monitoring of the extent and <br />magnitude of mining impacts. Where possible, reference has been made to those chapters <br />which contain details regarding certain practices. <br />Practices Employed to Minimize the Impacts of Mining on the Hydrologic System <br /> Ground Water Quality. The mining practices that involve replacement of spoil material <br />•~ into min e pits are detailed in Teb 20, Backfilling and Grading. Topsoil and overburden <br /> handling plans are detailed in Tab 21, Minesoil Reconstruction. Based on extensive <br /> analyses performed on lithologic and ground water data (see Tab 6, Geology and Tab [7, <br /> Probable Hydrologic Consequences), it was found that no acid or toxic materials are <br /> present in significant amounts in the Yoast mining area. Excess neutralization potentials <br /> were cal culated for all cadge overburden cores. Thus, replaced spoil wilt only have a <br /> minimal long-term impact on ground water quality. Because of these findings, no special <br /> hantll ing of materials is anticipated. <br />Each exploration hole, other drill or borehole, wel L, or other exposed underground opening <br />except those used solely for surface blasting will be plugged or sealed to prevent acid or <br />toxic drainage from entering the ground water, minimize disturbance to the prevailing <br />hydrologic balance, and ensure safety. Any holes, wells or other exposed underground <br />opening that will be temporarily inactive, but eventually used for mining related <br />purposes, will be temporarily sealed at the surface and secured and protected for safety <br />purposes by surface structures or barricades. <br />. Permanent sealing of holes, wells or other exposed underground openings not completed to <br />aquifers will be accomplished by replacing cuttings or other suitable media in the hole. <br />1 <br />