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• <br />SECTION 2.05.6(3)(b)(v) <br />HYDROLOGIC RECLAMATION PLAN <br />Introduction <br />The hydrologic reclamation plan is presented in two parts. The first part focuses on specific <br />practices which are conducted to minimize the impact of mining on the hydrologic balance within <br />and adjacent to the leasehold. The second part addresses those impacts that may occur <br />regardless of these practices. The emphasis of the second part is on the monitoring of the extent <br />and magnitude of mining impacts. Where possible, reference has been made to those sections <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 into mine <br />pits are detailed in Section 2.05.4(2)(c), Backfilling and Grading. Topsoil and overburden handling <br />plans are detailed in Section 2.05.4(2)(d), Topsoil (Redistribution). Based on extensive analysis <br />performed on lithologic and ground water data (see Section 2.04.6, Geology Description and <br />Section 2.05.6(3), Protection of the Hydrologic Balance), it was found that no acid ortoxic materials <br />are present in significant amounts in the New Horizon 2 mining area . Replaced spoil is expected <br />to impact ground water quality for about 25 years when the discharge quality will reach pre-mining <br />TDS of 1000 mg/I and surface level of 500 mg/I.. Because of these findings, no special handling <br />• of materials is anticipated for mining operations conducted. <br />Each exploration hole, other drill or borehole, well, or other exposed underground opening except <br />those used solely for surface blasting will be plugged or sealed to prevent acid ortoxic drainage <br />from entering the ground water, minimize disturbance to the prevailing hydrologic balance, and <br />ensure safety. Any holes, wells or other exposed underground opening that will be temporarily <br />inactive but eventually used for mining related purposes will be temporarily sealed at the surface <br />and secured and protected for safety by surface structures or barricades. <br />Permanent sealing of holes, wells or other exposed underground openings not completed to <br />aquifers will be sealed by replacing cuttings or other suitable media in the hole. A suitable plug will <br />be placed <br />• (REVISED 2-00) 2.05.6(3)(b)(v) - 1 <br />