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construct "A" and "B" segments as proposed in Exhibit 26A. The recommendation presented in Exhibit 26A-1 to compact the entue lift as one unit without dividing it into segments will be followed. This will increase the stability of the fill by removing the potential for establishing a slip plane between segments A & B. As noted in Exhibit 26A-1, the two segment construction was fot "zoned construction" and this is not required for smaller piles; 3) Temporar~Road Construction -the temporary road will be filled in with refuse material, as per the recommendation in Exhibit 26A-1, when it is no longer required. The recommendation includes benching and tying in with existing refuse pile to the north and south of this road.; 4) Subsurface and Surface Drainaee - small drainage ditches will be constructed downslope of the temporary stockpiles to minimize water running over and down finished slopes of the RDA. Also, it was recommended in Exhibit 26A-] that temporary drainage ditches be established along the eastern edge of the benches as they are constructed, to prevent excessive surface runoff from flowing over the furished/compacted slope of the RDA. The specific recommendations for these temporary drainages are presented in Exhibit 26A-1. ' During the construction of the RDA non-toxic material will be excavated from an area within the footprint of the pile. This material will be used in conjunction with the existing topsoil to provide a 4-foot covering of non-toxic material over the RDA. The excavated material will be replaced with compacted refuse material, which will serve to increase the capacity of the RDA without increasing the physical dimension of it. The excavated material may be temporarily stockpiled within the footprint of the RDA or placed in the existing stockpile to the south of the low quality coal stockpile. Concerning the Fish Creek Tipple, no excess spofl or underground development waste will be generated in connection with the operation Thus, the requirements of this section and Rule 4.09 aze not applicable. f 9) Return of Coal Mine Waste to Abandoned Working`s ~) Each_plan shall describe the desig r~operation and maintenance of anv ~ronosed coal pmcessin~ mine waste disposal facility, including_flow diaerams and anv other necessary drawings and ma r~s which must meet the standards of 2.10, for the approval of both the Division and the Mine Safety and Health Administration in accordance with 4.11.3. j,,b Each elan shall describe the sowce and~uality of waste to be stored, azea to be backfilled, gercent of the mine void to be filled. method of constructing and mound retaining walls, influence of the backfillin¢ aeration on active underazound mine operations. surface area to be supported by the hackfill. and the anticipated occurrence of surface effects following_backfilling, (c) 71re~plicant shall describe the source of hydraulic transport medium method of dewaterine (d) The plan shall describe each permanent monitoring well to be Located in the backfilled area, the stratum wrderlyine the mined coal. and ~~radient from the backfilled area. (e) The re uirements of 2.05.3 shall also apply to nnetnnatic backfilling operations, except where the operations are exempted by the Division from requirements specifyine hvdroloeic monitoring RESPONSE TCC is planning on returning the thickener underflow generated at the Prep Plant to the abandoned workings located in the Eastern Mining District. The location of the azea to receive the tmderflow is shown on Map 23. In the plant, the thickener underflow goes to a filter press for dewatering, and this material is then combined with the course refuse and hauled to the refuse pile for placement. It is TCC's intent to pump the thickener underflow into the abandoned mine works as opposed to mixing it with the couuse refuse for placement in the refuse pile. The thickener underfloor is typically a 25 percent solids (17.8 tons TR 05-47 2.05-97.1 Revised -January 2005