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<br />Access roads for haulage of topsoil, subsoil and overburden are <br />maintained within the active pit operation. These in pit roads <br />are required to move from bench to bench in order that overburden <br />and coal be hauled on these roads to the appropriate overburden <br />fill on soil or access stockpiles. GEC Minerals, Inc. maintains <br />the roads within the pit area in a safe and efficient manner conducive <br />to increased productivity. In most cases, these roads change at a <br />relatively high frequency to facilitate material movement from bench <br />area to Haulage Road "A" or the overburden fill area. Access roads <br />and light duty roads are maintained ahead of the operation as <br />required to facilitate the proper supervision and safety of the <br />operation. As the mining progresses these roads are destroyed <br />since they are located within the mined area. <br />Ponds, Empoundments and Diversions. Ponds and diversions which GEC <br />Minerals, Inc. plans to construct are located on Hydrology Map No. 8 <br />• and consist of Sediment Ponds E, F and G and Diversion Ditches <br />A and B. These structures have been designed utilizing Performance <br />Standards of 4.05 and the drainage basins as outlined on the <br />Hydrology Map No. 8 of the mined area. <br />GEC Minerals, Inc. plans to construct these structures during early <br />1982 prior to the mining of the Eastern portion of the mine area. <br />Construction of these structures will be completed prior to the <br />removal of topsail, subsoil or any other surface disturbance within <br />these drainage basins. Their construction will be supervised by <br />the trained officials of GEC Minerals, Inc. and other qualified <br />personnel required by the Rules and Regulations of this Section. <br />The size specifications for the sediments ponds have been designed <br />with regard to the sediment volume of .1 acre-feet per acre of <br />disturbed area and a 10-year 24-hour precipitation event for drainage <br />basins outlined on the Hydrology Map No. 8. The method which has <br />been used to determine these amounts include planimetering the <br />• drainage area and containment of the entire 10-year 24-hour event <br />2.05-12 <br />