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<br />EROSION CONTROL PLAN <br />To treat the runoff from Topsoil Stockpile No. 8, Peabody has installed a <br />Series of straw bales to trap and filter the small quantity of sediment <br />that may run off this stockpile. See Figure 1 for the location of the <br />straw bales. <br />Peabody proposes to construct a catchment basin to contain the runoff from <br />Topsoil Stockpile No. 13 that does not drain into Sedimentation Pond 001. <br />This catchment basin will completely contain the runoff from a 10-year, <br />24-hour precipitation event. See Figure 1 far location of the basin and <br />Figure 2 for a typical catchment basin configuration. The stockpile <br />runoff will be diverted into the catchment basin by catchment ditch to <br />ensure all runoff is treated and contained. These ditches will be <br />v-shaped and at least one foot deep. The minimum required capacity of the <br />catchment basin to completely contain the runoff is 0.06 acre-feet, or <br />2650 cf. A copy of the SEDCAD+ output for this stockpile is attached. <br />Peabody will construct the catchment basin and seed all associated <br />disturbances and stockpiles with the approved seed mix on or before <br />October 31, 1990. <br />