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1 Hydrology ' A map illustrating CYCC's proposed hydrology plan is enclosed as Map 4k3, Mine 3 Reclamation Plan - Hydrology. Drainage control for this area is separated into two sections, one for the Middle Creek Mine portal pit ' area and one for the area south of the county road. As shown on Map ~k3, all runoff from the portal pit area will be contained ' in diversion ditches and will flow through a sediment control facility before being released into Middle Creek. This pond will be sized to pro- vide adequate sediment volume and detention time for runoff from the af- ' fected areas. CYCC is requesting a small area exemption from sediment control for the overburden stockpile area west of the county road. The size of this area relative to the overall disturbance area is small and would require in- creased disturbance if it were included in the drainage plan for the por- tal area. Little time will be required to stabilize the area once the ' overburden pile is removed and final grading is completed. It is pro- posed that the entire operation including grading, distribution of top- soil and revegetation will be completed in the same year. ' Drainage control for the reclaimed land south of county road No. 33 and No. 179 will consist of a series of diversion ditches and a detention pond as shown on Map ~k3. Most of these control structures are currently in existence. The existing detention pond will be sized to control runoff from the af- ' fected area for a twenty-five year storm event. Modifications to the pond to bring it to the specified size will include constructing a berm on the west side and a designed spillway on the north side. ' Sizing of the sediment control structures will be done once the general plan is accepted. ' Topsoil Movement Presented on Map OkS, Mine 3 Reclamation Plan - Topsoil Movement, is a ' year-by-year breakdown of topsail distribution. Included on the map is a table listing the yearly quantities to be moved from each stockpile. With one exception, all topsoil work involved in this reclamation plan is topsoil replacement. The only exception involves the stripping of 12,800 cubic yards from a strip between the west highwall of the Middle Creek Mine portal pit and the county road. It is necessary to strip this area ' because of the dozer work required to achieve the proposed poet mining topography. ' Topsoil replacement will be completed in three years as proposed. In year one, 162,400 cubic yards will be distributed on the area around the permanent overburden stockpile. Approximately three weeks will be re- ' quired to complete the work in year one. Year two topsoil replacement will be on the center area of Mine 3 as illustrated on Map ~i5. A total ' 2