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<br />Discharge of Water into an Underground Mine <br />The Division is proposing to approve an exemption from the <br />requirements for pH and total suspended solids contained <br />in Rule 4.05.2 for a discharge of water into an under- <br />ground mine. The exemption is based on a demonstration <br />that the discharge will abate water pollution or otherwise <br />eliminate public hazards resulting from surface or <br />underground mining activities, and such flow consists of <br />coal processing waste, fly ash, sludge from an acid mine <br />treatment facility or from flue gas desulferization, inert <br />materials used for stabilizing underground mines, or <br />underground mine development wastes. The water originates <br />from the hydraulically closed pipeline system and will be <br />discharged into the mine for use in the hydraulic mining <br />operations (4.05.16(2)). <br />IV <br />V <br />Topsoil - Rules 2.04.9, 2.05.3(5), 2.05.4(2)(d>, and 4.06 <br />Baseline soils information, topsoil removal and redistribution plans are <br />found in pages 3-54 to 3-61, 4-45, 4-55 to 4-56 and 4-63 in permit Volume <br />I, as well as Appendix 3.5-1 in Volume II. <br />The two soil types occurring within the proposed area are the Heldt Silty <br />Clay with an average salvage depth to 60 inches and the Nihill Stony Loam <br />with an average salvage depth to 12 inches. Most of the surface and <br />subsurface soil horizons rate fair to good as a source of topsoil <br />material, exhibiting both low electrical conductivity and sodium <br />absorption ratios. <br />Topsoil stockpiles have been located around the perimeter of the <br />facilities area to help provide visual screening. Figure 4.4-3 shows the <br />location of the topsoil stockpiles. After backfilling and regrading <br />operations are complete, redistribution of topsoil will occur. The <br />topsoil will be spread to a depth from 12 to 16 inches over the areas to <br />be reclaimed. NCIG has already reclaimed the cut and fill slopes with 16 <br />inches. <br />Due to the mining method to be employed, little coal refuse will be <br />produced. The initial mine waste will be at the portal pads. Sixteen <br />inches of topsoil will be spread on the portal pad and slopes prior to <br />revegetation. Reclamation of the portal pad slopes will be conducted <br />as afield trial to demonstrate that 16 inches of topsoil is adequate <br />for desired vegetation establishment. If the 16 inches is found <br />insufficient, NCIG Financial, Inc. has additionally committed to <br />adding up to four feet of topsoil if necessary, to establish vegetative <br />success. <br />Sealing of Drill Holes and Underground Openings - Rules 2.05.4(2)(g) <br />The Division will require that each hole, well or other underground <br />opening be capped, sealed, backfilled, or otherwise properly managed <br />(4.07.3). <br />-23- <br />