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• <br />Thickness of Overburden and Mineral De <br />Approximately one 111 foot of topsoil will be removed and stockpiled; five (5) to six <br />(6) feet of overburden and waste material will be removed; and 23 to 24 feet of <br />sand gravel will be extracted. Appendix A contains the results of exploratory <br />drilling the property. <br />Sediment Control <br />The operation will be designed such that there will be controlled discharge to <br />surface drainages for dewatering of mine pits. Diversion ditches and berms will <br />prevent uncontrolled off-site discharge into the natural drainage system. Runoff on <br />the property will be directed to sumps on the pit floor where surface runoff and <br />groundwater pumped out. The discharged water will be handled according to the <br />CPDS permit and the requirements of the State Engineer. <br />