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• sufficient volume for sediment and detained water and selection of <br />proper spillways and outlet devices, passing of design storm events and <br />proper outflow rates. The pond has been designed under the direction of <br />a qualified, registered professional engineer. <br />The purpose of the sedimentation pond is not only to prdvide a final <br />measure to prevent additional contributions of sediment outside the <br />permit area, but also to provide a means of compliance with all <br />applicable effluent limitations, especially with respect to total <br />suspended solids. <br />The effluent quality is regulated by Section 4.05.2, and by the National <br />Pollutant Discharge Elimination System (NPDES) Permit. The NPDES Permit <br />was issued by the State of Colorado, Department of Health under the <br />National Pollutant Discharge Elimination System, established as a result <br />of the Clean Water Act (33 U.S.C. Section 1251, et sec). A copy of the <br />request for an NPDES Permit is found in Exhibit 4, Permits for Mining. <br />• The engineering parameters for the sedimentation pond and diversion <br />ditches are included in Exhibit 11, Drainage and Sediment Control Plan. <br />Topsoil <br />Prior to past surface facility related disturbances, no topsoil was ever <br />removed from the site. No additional disturbance is planned by Sunbelt. <br />Overburden <br />No overburden is.anticipated to be moved and stored as a result of the <br />continued operation of the Peacock Coal Mine. Sunbelt merely plans to <br />resume mining from the existing face-up area. Likewise, no surface <br />blasting will be undertaken. <br /> <br />2.05-19 <br />