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• 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 ten feet below the ground surface to support a cement plug or other media to within <br />three feet of the ground surface. Permanent sealing of holes, wells, etc. completed in aquifers will <br />be sealed using cement or other suitable sealant. The sealant will be placed in the hole from the <br />bottom to within ten feet of the surface. Surface plugs used to complete the permanent sealing of <br />holes, wells, etc. will be selected and used only if the OMLR gives prior approval. All associated <br />surface sites will be reclaimed following the cessation of mining. WFC will submit to the OMLR a <br />proof of compliance report containing pertinent information on permanent sealing of any hole, well, <br />etc. within 60 days of completion of such activities. <br />Ground Water Quantity. The backfilling and grading of spoil materials is accomplished by dozers <br />and trucks (see Section 2.05.4(2)(c), Backfilling and Grading). Procedures outlined in Section <br />• 2.05.4(2)(c) will insure the eventual resaturation of the disturbed areas (pits) by creating greater <br />porosities and hydraulic conductivities due to increased void volumes. In addition to backfilling <br />methods, topsoiling and reclamation plans outlined in Section 2.05.4(2)(d), Topsoil (Redistribution), <br />and Section 2.05.4(2)(e), Revegetation, will enhance the potential for establishing reclaimed areas <br />that exhibit similar infiltration rates and recharge capacities to premining conditions. Reseeding <br />and mulching of redistributed topsoil will augment moisture retention and infiltration rates of the <br />reclaimed areas. Mechanical manipulation ofthe regraded spoil and topsoil (chisel plowing, disking <br />and ripping) will further aid the percolation of soil moisture downward toward the water table. <br />Ground water inflow to the pits will be removed by pumping the water into a sediment pond. <br />Design criteria for sediment pond 007 is presented in Section 2.05.3(3), Mine Facilities. The pond <br />is designed to contain runoff from a 10-year, 24-hour storm event plus additional storage capacity <br />for water pumped from mine pits. <br />Surface Water Quality. The sediment pond is designed to prevent additional contribution of <br />sediment to stream flow outside the permit area and incorporates detention times sufficient to <br />ensure that all applicable effluent standards will be met. The pond is currently planned to be <br />removed and reclaimed following the completion of mining. <br />• <br />(Revised Bury zoos) 2.05.6(3)(b)(v)-4 <br />