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• Grading to expand the existing coal stockpile azea to the north <br />The regraded configuration and facility locations aze shown on Map 24. Required grading involved movement of <br />• approximately 54,000 CY of material, with approximately 31,000 CY of cut and 23,000 CY of fill. Supplemental fill <br />material was obtained from the azea of the ventilation borehole. Approximately 600 CY of fill will be hauled in to the S~ <br />preparation plant site on the north side of the Overland Conveyor. Approximately 4,000 CY will be hauled in from ~ <br />the borrow area to the reclaim tunnel site on the south side of the Overland Conveyor. The borrow area is located <br />in a disturbed area immediately south of the low quality coal stockpile. This material was scheduled to be graded <br />down the hill during fmal reclamation of the mine. A berm will be constructed on the south end of the proposed h6 <br />coal stoker pad when construction of the prepazation plant and bent foundation work is completed to direct drainage <br />from this site to Pond E. Site preparation and grading activities for the preparation plant and coal stockpile expansion <br />required modification of drainage sttvctwes in the effected areas. Required modifications, as shown on Map 24, <br />include the following: <br />• Elimination of the lower portion of Ditch D-2 and diversion of the upper portion of Ditch D-2 to Ditch <br />E-2 <br />• Modification of the dischazges from Site 109 and the Wedge sump to divert discharge flows to Site 114 <br />(Emerald Springs) <br />• Addition of Ditch E-3 to intercept and route runoff from the former stoker coal storage small area <br />exemption to Pond E <br />• Relocation and reconstruction of Pond E and the resulting relocation of the lower portion of Ditch E-1 <br />Z ~ ~ consistent with the new pond location <br />• • Installation of a new culvert in Ditch D-3 to allow backfilling of a portion of the existing ditch in order to <br />provide both access and a flat azea for installation of feed hoppers and transfer conveyors for the proposed <br />preparation plant <br />• Redesign and relocation of a portion of Ditch E-1 on the north edge of the expanded coal stockpile azea and <br />associated access road. <br />• Relocation ofthe culvert which passes flows from Ditch E-2 under the haul road to Pond E <br />• Construction of a berm along the north and west sides of the clean coal and stoker coal stockpile area to <br />intercept and divert surface runoff to Pond E <br />Design calculations for construction or modification of the noted drainage structwes are included in Exhibit 8. The <br />design for Sedimentation Pond E can be found in Exhibit 8E. Also, Plate 1 from Exhibit 13 of Permit C-81-071 is <br />included within the Pond E exhibit. The design on this plate is followed, except where modified, by the work <br />prepazed by Terra-Matrix. <br />In order to facilitate construction of the Preparation Plant it was necessary to drive a total of 84 pilings to support <br />the various preparation plant facility buildings. A total of thirty pilings, approximately ] 0 inches wide and 21 feet <br />in length, were placed under the footprint of the preparation plant building. The thickener building required 20 <br />pilings, approximately 8 inches wide and 24 feet in length. The conveyor supports required 24 pilings, <br />approximately 8 inches wide and 21 feet in length. The reclaim hopper and tunnel required 10 pilings, <br />approximately 10 inches wide and 10 feet in length. A piling driver rig was used to install the pilings. Concrete <br />piers will be powed around the top of the pilings, requiring a total of approximately 230 CY of concrete. In --SAS <br />• addition to the pilings, the Prepazation Plant building and the Thickener Tank will have powed concrete floor slabs. <br />The piers and floor for the preparation plant and thickener will require approximately 84.5 CY and 12.5 CY of <br />TR06-53 2.05-29 05/03/06 <br />