2003-08-26_GENERAL DOCUMENTS - C1981041

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(4.10.2(1)). Inspection shall occur quarterly and at critical construction periods. A copy of the inspection report will be retained at the mine office and a copy will be forwazded to the Division. 2. An alternative subdrainage system for the coal mine waste area has been approved. The Division finds that such an altemative will ensure the applicable static safety factor, stability of the fill, and protection of the surface and groundwater (4.10.3(5)). No underdrains will be constructed on Cameo Refuse Disposal Areas No. 2. The Roadside Refuse Disposal Area was also constmcted without an underdrain. The permittee has demonstrated, based on physical and chemical analyses of refuse material and cover soil, and vegetation field trials, that the revegetation requirements of 4.15 can be met with less than four feet of cover on the coal processing waste bank (4.10.4(5)). This study which was conducted over a span of 10 yeazs was finalized during the summer of 1993. A determination on the required cover depth was made by the Division pursuant to approval of Technical Revision 16, in January, 1994. For further relevant discussion, see Section C.III of this document. VII. BackfillingandGrading Following removal of mine facilities, buildings, and asphalt, and sealing of underground mine openings, all azeas affected by surface operations will be backfilled and graded as necessary to stabilize slopes and promote successful revegetation. The anticipated final surface configuration for each affected surface azea, as well as existing and proposed postmine cross-sections, aze depicted in Exhibits 6C through 12C, and Exhibits 26, 27 and 28 of the permit application. Original reclamation plans for the South Portals area had entailed retention of existing mine bench and highwall, but the plan had been revised to reflect elimination of the bench and highwall, and to approximate the general nature of the premaning topography, prior to the 1993 permit renewal. As a component of the 1995 mid-term review, the Division requested additional detail on final reclamation configuration of the Roadside Refuse Disposal Area (RSRDA), and documentation of reclamation material balances for the entire South Portal azea, including the RSRDA. PR-02, approved in 1997, included a more detailed final reclamation plan for the Roadside Refuse Disposal Area (RSRDA) and South Portals disturbance area. Documentation of material balances was also provided in PR-02, in 1997, and relevant postmine topographic maps and cross-sections were amended. Further refinements of the final reclamation plan for the South Portals and RSRDA, including amended permanent drainage plans, were approved via technical revisions prior to initiation of final reclamation in 2002. RSRDA slopes and terrace drains were reclaimed in 2002, and a new upper diversion beginning just above the portal highwall and extending to the south around the RSRDA was constmcted. The wash plant and associated facilities were removed, however various additional facilities remain on the lower and upper benches. Concrete seals were installed in the South Portals, but the portals out-by the seals have not yet been backfilled. Remaining facilities removal and final reclamation including backfilling and grading and final drainage installation at the South Portal Area is to be completed by the end of 2004. The North Decline was backfilled and graded in the spring of 1992. Material that had been piled above the portal azea was dozed into the decline. A fair approximation of extrapolated original contours was achieved. The North Decline had been constructed prior to the Act so accurate records 40