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<br />of an additional underdrain, separate placement of fine and coarse refuse, <br />and placement in two (2) foot rather than three (3) foot lifts, EFCI has <br />adopted the recommendations presented in this report as the coal refuse <br />disposal operating plan. <br />Expansion of the existing coal refuse pile will involve the following <br />series of sequential activities; <br />- Extend existing stockpile collection ditches <br />- Clear, grub and remove topsoil from expansion foundation area <br />- Extend existing rock subdrains <br />- Place and compact refuse material according to design <br />- Grade top surface and sideslopes to provide effective drainage <br />- Replace and grade topsoil <br />- Revegetate topsoiled areas <br />• <br />• <br />Each of these activities are described in the following sub-sections. <br />Collection Ditch Extension <br />The proposed refuse pile expansion area is currently undisturbed and <br />drains to the existing South Refuse Collection Ditch. <br />Prior to disturbance of refuse pile expansion areas, EFCI will extend <br />existing collection ditches so that all disturbed area drainage is <br />controlled. The extended collection ditches as shown on the Coal Refuse <br />Pile Expansion Map (Map TR07-1) will capture and route runoff from both <br />existing pile and expansion areas to Sedimentation Pond No. 4. EFCI is <br />currently working to complete the North, West, and Clean Water diversion <br />ditches by November 15, 1989. In order to maintain access, the South <br />diversion ditch will not be extended to it's full design limit at this <br />time. Rather, extension of the South ditch will be sequenced to coincide <br />with topsoil removal ahead of the refuse pile advance. Each subsequent <br />ditch extension will be designed to capture all runoff from the <br />5R Revised - February, 1990 <br />