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Access Roads. The planned access road for Coal Gulch Mine is shown on <br />the Mine Facilities Map (Map 12). <br />Ponds, Impoundments, and Diversions <br />To control runoff and protection surface water quality, Peerless <br />Resources, Inc. will construct severs l diversion ditches and a <br />sedimentation pond. The Mine Facilities Map (Map 12) shows the location <br />of the sediment pond and diversion structures. The designs and <br />specifications are presented in Exhibit 13, Drainage and Sediment <br />Control Plan. <br />A theoretical detention time of 24 hours has been used in the design of <br />the sedimentation pond so that all runoff occurring as a result of the <br />10-year, 24-hour precipitation event will be treated to produce a total <br />of suspended solids (TSS) concentration less than or equal to 30 <br />milligrams per liter. The pond is designed to provide storage for the <br />inflow entering the pond as a result of a 10-year, 24-hour precipitation <br />event. <br />The initial phase in the construction of the sedimentation pond will be <br />to clear all unstable material from the location of the pond. In no <br />instances will coal processing waste be used as an embankment. Any fill <br />material used in the embankment will be selected to exclude the presence <br />of sod, large roots, or frozen material. The placing and spreading of <br />any fill material will be started at the lowest point of an embankment <br />foundation. <br />The pond will be examined periodically for structural weakness, erosion, <br />and other hazardous conditions. Maintenance procedures may include <br />mowing or cutting excessive vegetative growth to facilitate inspections <br />and repairs, keeping ditches, culverts, and spillways free of debris, <br />and removing all combustible material other than mulch and other <br />material required far erosion control and surface stability. Sediment <br />• will be removed from the sedimentation pond when the volume of sediment <br />accumulates to 60% of the design sediment storage volume. The <br />2.05-17 <br />