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Permii Revision No. 7 -Responses <br />March 7. 1997 <br />Reclamation Plan (2.05.4) <br />Page 10 <br />54. It is estimated that approximately six months will be required to complete all the major steps <br />in the reclamation plan. The plan involves demolishing the major structures first (fans, hoist, <br />substation, power poles and lines, etc), then reclaim the light use roads (including the <br />substation and electric borehole road), then reclaim the shaft site, the sediment pond, and <br />then reducing the main haul access road to a light-use road. After areas are regraded, <br />topsoil will be replaced and the areas seeded and mulched. <br />55. No response required. <br />56. Reclamation of the ventilation shafts will include removal of the hoisting facilities, removal <br />of the ventilation fans facilities and sealing of the ventilation shafts. All structure <br />foundations will be removed and disposed in the shafts. The concrete collar pads will be <br />removed from both shafts and also disposed in the shafts. The ventilation shafts will be <br />sealed in accordance with Rule 4.07, by constructing a steel structure approximately five <br />feet below the proposed collar elevation (one foot below the bottom of the collar concrete) <br />that will span the shaft and support a concrete seal. A 12" thick concrete seal will be <br />constructed that will fill the entire inside diameter of the lined shaft and completely seal the <br />opening. The ventilation shafts will not be completed in aquifers, nor will any aquifers be <br />intercepted. Suitable fill material will be used to cover the concrete seal to the level of the <br />surrounding terrain. This sealing method will be used for both ventilation shafts and <br />complies with MSHA regulations and is designed to prevent access to the mine workings by <br />people, livestock, fish and wildlife and machinery. <br />57. Total net fill volume required for the SGFA has been recalculated based on final design <br />drawings and now totals 168,000 CY. Of this volume, approximately 148,000 CY will <br />come from the usable materials underlying the RPE site (TR#79). Approximately 12,000 <br />CY of road base material, 2,000 CY of riprap, 5,000 CY of sand, and 1,000 CY of select <br />structural fill will be purchased and imported from offsite sources. <br />58. MCC calculates the total SGFA disturbed area to be 49.5 acres, not including topsoil <br />storage areas, based on a computer generated perimeter mapping of the limits of <br />construction. Adding the topsoil storage areas adds approximately 12.5 acres bringing the <br />total disturbed area for the SGFA up to approximately 62 acres. <br />59. Pre-mining, post-construction, and post-mining cross-sections of the disturbed area have <br />been added to the permit as Map 59A. The reclamation plan view map, previously SGP-15, <br />has also been revised and is now Map S8A. <br />60. The net cut for the substation is 77,000 CY, and will be used to balance net fill requirements <br />for the main access road, shaft site, substation road, and/or other areas. <br />