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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 MSI-IA. No toxic or combustible material will ever be used in [he construction 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, [he well will be 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 [o [he Reclamation Plan Map (Map 29) for the post-mining topography. The remaining structures and <br />facilities including the shop/office building and the mine scrap yard will be maintained to be utilized in [he planned <br />operations of the No. 6 Mine. <br />When no longer required as support facilities, the shop/office building and scra pyard 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) fee[ 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 to 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 (undisturbed areas west of old <br />County Road 13 dropping down in elevation towards the Williams Fork River and new County Road 13, see Map 29) <br />will be returned 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 west of old County Road <br />13 [o new County Road 13 (described above) will be returned to apost-mining land use of rangeland/wildlife; and <br />therefore, the rangeland/wildlife seed mixture will be utilized. It is anticipated that a rangeland drill will be used for <br />the seeding; however, if the seed mixture is broadcast seeded, the seeding rate will be doubled. The reseeded area will <br />then be straw mulched, with the mulch applied at a rate of two tons/acre, and it will either be crimped in or tackified to <br />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 a[ [he 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 construction will begin in its southern portion until the whole pile is level. <br />Once the pile is level, construction will generally be from north to south. Lifr thicknesses will be about 24 inches and <br />each lift will be compacted to 90 percent of the maximum density determined by T-99 procedures. Pile construction <br />specifications are presented in Exhibit 21, Waste Disposal Site. <br />Once the pile reaches its designed height, topsoil will be distributed over the area to a depth of 6 to 12 inches. <br />Once the pile reaches its designed height, a minimum of two (2) feet of non-toxic material will be used as cover on <br />the pile. Because the No. 9 Mine pit will be filled with waste material, the original fill material in the berm around <br />the pit (approximately 185,000 cubic yards) will be used for the four (4) foot non-toxic cover on the present waste <br />pile. The remainder will be placed on the No. 9 Mine yard. Topsoil will be distributed over the area to a minimum <br />depth of six (6)inches. <br />Before additional material is put on [he refuse disposal area, EC will demonstrate that there is sufficient material to <br />provide a 4 foot cover and address the salvage and stockpiling of the non-toxic cover material. <br />Permit Revision 04-34 2.05-29 7/2/04 <br />