2011-03-21_PERMIT FILE - C2009087A (2)

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RULE 2 - PERMITS All areas disturbed by mining and related operations will be reclaimed as soon as operationally • practical following completion of mining if they are not to be used in conjunction with ongoing activities. Reclamation will involve removal of mine structures and facilities, backfilling and regrading disturbance areas, replacement of soil and substitute materials, and revegetation. These activities are designed to re- establish drainage patterns similar to those that existed prior to development and develop a self - sustaining vegetative community. As a result of effective reclamation, infiltration and runoff relationships will be restored, limiting the time interval over which water quality impacts may occur. Where appropriate, PSCM will utilize drainage control measures to prevent or mitigate potential impacts from ongoing operations. Such measures may include use of surface binders and dust suppression agents on haulage roads, soil /substitute stockpiles, and in active working areas, placement of straw bales, sediment fence, erosion netting, mulch berms, stilling basins, sumps and other small structures to control and route drainage, limit surface erosion, minimize flow velocities, and reduce suspended sediment levels. Stream culverting is designed to minimize mining - related impacts and accommodate construction of the required roads and portal facilities for PSCM. The proposed culvert installations are located on ephemeral drainages /ditches. Culvert installation may temporarily affect stream flows during construction, and stream restoration activities following culvert removal may result in increases in sediment contributions. Mitigation measures include design of the reestablished channel segments to be stable under anticipated normal flow conditions, scheduling of construction during the seasonal low flow period if feasible, utilization of site - specific alternative sediment control measures to minimize potential sediment contributions both during and following construction, extensive use of riprap and other erosion control materials in both the channel and adjacent bank . areas, and revegetation of all construction disturbance areas using appropriate herbaceous species and woody plant species for stabilization and wildlife habitat enhancement. Surface placement of coal may affect surface water quantity and quality. Surface runoff from the related disturbance areas may increase, resulting in increased erosion and sediment loss. Coal stockpile areas will be constricted to provide effective drainage of both runoff from stockpile surfaces and infiltration through the stockpiles. Designed ditches will collect and route surface runoff from coal stockpile areas to designed sedimentation ponds. The locations of the designed ditches and sedimentation ponds are shown on Map 2.05.3 -M4, Drainage and Sediment Control Plan, and detailed design calculations are presented in Exhibit 2.05.3 -E2, Drainage and Sediment Control Plan. Surface runoff from the overburden fill area (developed as the coal stockpile /facilities pad) will be controlled by site grading, localized drainage control measures, and by collection ditches. Upgradient drainage will be diverted around the stockpile areas. Ditches will collect and route surface runoff from the pile areas to sedimentation ponds for settlement of suspended solids and treatment if necessary. The locations of the ditches and sedimentation ponds are shown on Map 2.05.3 -M4, Drainage and Sediment Control Plan, and detailed design calculations are presented in Exhibit 2.05.3 -E2, Drainage and Sediment Control Plan. Operation of sedimentation ponds under PSCM's pending CDPS permit will assure compliance with applicable water quality regulations and effectively mitigate any potential surface water quality impacts. The initial step in reclamation of the coal stockpile will involve removal of any remaining stockpiled coal materials and associated PSCM Permit App. 2.05 -97 Revision 03/05/10