2012-01-06_PERMIT FILE - C1982057A (5)

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~a;= _~ ~ ' } TAB 1.B HYDROLOGIC RECLAMATION PLAN Iritroductiort. ' - ,,, :, , . ' 9 The hydrologic reclamation plan is„presented.in twp.parts. The first part focuses v~ specific practices which are conducted fb minimize the impact,of,mining on.the hydrologic balance within and adjacent to thq.,;permit ared• The-second part addresses those .impacts that may occur;,rggardless of these practices. The emphasis of the second part is on the monitoring of the extent and, magnitude of mining impacts. Where possible, reference has beeri made to those chapters which contain details regarding certain practices. ~ _ Practices Employed to Minimize the Impacts of Mining on,the Hydrologic System Ground Water Quality. The mining practices That involve replacement of spoil material into mine pits are detailed in Tab 20, Backfilling and Grading, Topsoil and overburden handling plans are detailed in _ Tab 21, Minesoil Reconstruction. Based on extensive analysis performed on litl7glogic and ground water data (see Tab 6, Geology and Tab 1 ~, Probable Hydrologic Consequencesl;:it;was found that no •~ - acid or toxic materials are present in significant amounts in the Seneca II-W mining area-and that replaced spoil will only have a minimal long-term impact on ground water quality. .-'Because of ,these findings, no special handling of materials is anticipated.. . . , - ~?, Eachexploration hole, other drill or borehole, well, or other exposed underground opening except those used solely for surface blasting will be plugged'or sealed to prevent acid or toxic drainage-from entering the ground water, minimize disturbance to the prevailing hydrologic balance, and ensure safety. Any holes, wells or other expdsed underground opening that will be temporarily inactive, but eventually used for mining related purposes, will be temporarily sealed at the surface and secured and protected for safety~by surface structures or barricades. Permanent sealing of holes, wells or other exposed underground openings not completed to aquifers will be sealed by replacing cuttings or other suitable media in the hole. A suitable plug will be placed ,,, ten feet below the ground surfaca to support a cement plug pr other media to within ~ three feet of the ground surface. Permanent sealing of hales, ~ .-