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material placed over the portal entries effectively sealed the No. 9 portals. This portal sealing plan has previously <br />• been approved by MSHA. No toxic or combustible material will ever be used in the constmction of the seals. Once <br />the initial backfilling is completed, waste material including coarse reject will then be hauled periodically to the <br />excavation and placed in 2-foot lifts. Placing of coarse reject in the excavation will be an ongoing process which will <br />continue until it reaches a maximum height of four (4) feet below the planned reclaimed surface. The coarse reject <br />material and coal waste that had been previously stockpiled at the No. 9 Portal site was placed in the backfill. Once <br />the waste material reaches its designed height, the remainder of the excavation will be covered with backfill material <br />surrounding the portal excavation. Although final grading of the backfill has not been completed, a monitoring well <br />has been installed. Until final grading is completed, the well will he monitored for water level on a quarterly basis. <br />Please refer to Exhibit 29 for frequency and parameters that will be monitored after final grading has been completed. <br />Please refer to the Reclamation Plan Map (Map 29) for the post-mining topography. The remaining structures and <br />facilities including the shop/office building and the mine scrapyard will be maintained to be utilized in the planned <br />operations of the No. 6 Mine. <br />When no longer required as support facilities, the shop/office building and scrapyard will be removed from the site. <br />The existing base material will be graded to ensure that the planned post-mining topography will be achieved <br />following the covering operations. If excess base material is present, it will be transported to the waste disposal site <br />and handled in accordance with the operations described in Exhibit 21, Waste Disposal Site. The area and associated <br />pad will be covered with a minimum of four (4) feet of previously excavated material and regraded to blend in with <br />the reclaimed topography. The entire regraded area will be left in a roughened condition t~ minimize topsoil slippage. <br />The topsoil, which was temporarily stored adjacent to the No. 9 Portal area, will then be redistributed over the area to <br />a depth of 6 inches. The entire area with the exception of the No. 9 dewatering system below old County Road 13 <br />will be resumed to apost-mining land use of cropland or pastureland. Therefore, the area will be seeded with the <br />cropland or pastureland seed mixture. The portion of the No. 9 dewatering system located below old County Road 13 <br />will be returned to apost-mining land use of rangeland/wildlife; and therefore, the rangeland/Hildlife seed mixture <br />• will be utilized. It is anticipated that a rangeland drill will be used for the seeding; however, if the seed mixture is <br />broadcast seeded, the seeding rate will be doubled. The reseeded area will [hen be straw mulched, with [he mulch <br />applied at a rate of two tons/acre, and it will either be crimped in or tackitied to the surface.. <br />It is envisioned that the area planted to cropland will be planted with a cereal grain, most likely Winter Wheat, and <br />will be planted at the rate of 60 pounds/acre. <br />Waste Disposal Site (Approved) <br />The reclamation of the presently approved waste disposal site will be a continuing process and will be initiated once <br />the waste pile reaches the prescribed elevation. <br />Due to uneven topography, primary pile constmction will begin in its southern portion until the whole pile is level. <br />Once the pile is level, constmction will generally be from north to south. Lift thicknesses will be about 24 inches and <br />each lift will be compacted to 90 percent of [he maximum density determined by T-99 procedures. Pile constmction <br />specifications are presented in Exhibit 21, Waste Disposal Site. <br />Once the pile reaches its designed height, a minimum of four feet of non-toxic material will be used as cover on the <br />pile. The non-toxic material will be a combination of fill (existing No. 9 Mine bean) and topsoil. The fill will be <br />placed to a depth of 3 - 3.5 feet and covered with .5 - I foot of topsoil. Because the No. 9 Mine pit will be filled with <br />waste material, the original fill material in the berm around the pit (approximately 185,000 cubic yards) will be used <br />for the 3.5 feet of non-toxic cover on the present waste pile. The remainder will be placed on the No. 9 Mine yard. <br />Topsoil will be distributed over the area to a minimum depth of six (6) inches. <br />After redistribution of topsoil, the topsoil will be analyzed and the necessary amendments will be added to <br />MidTerm Response <br />2.05-28 <br />Revised 12/05/01 <br />-T+i 33 <br />