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Jan 29 08 11:04a Greg Lewicki and Associat 3033466934 p.4 <br />6. Water HandEng & Detention in Permit Area During Mining <br />All water from the main disturbed area is captured in the pit, which is large enough to handle a <br />PMP event. Water that does run off into the pit is absorbed into the gravel and becomes <br />groundwater. The berm around the pit and the hillside to the east prevent any undisturbed runoff <br />from entering the pit. The bottom of the excavation of the pit will be approximately 2 feet above <br />the static groundwater table in order to ensure that groundwater is not exposed through the <br />mining of the pit. The pit is intended to be a dry pit and as such the pit does not have a gravel <br />well permit or any other required water permits. <br />The expansion mining area will be mined from the east to the west, constantly maintaining a <br />gradient of the disturbed area toward the existing pit, therefore, there is no need for sediment <br />control ditches or sumps on the east side of the expansion area. An existing dirt road is the <br />eastern edge of the disturbed area. A small gully immediately east of this road which drains to <br />the north will not be affected by the operation. <br />The existing topsoil berm and the berm around the employee housing area are well vegetated and <br />have no significant signs of erosion. <br />As of the start of 2007, many of the pit slopes have also been reclaimed, but import material has <br />been significant and some of the slopes on the north side of the pit have been backfilled, <br />covering the reclaimed slopes of 3H: IV. <br />The new topsoil stockpiles to be created for the 2007 Amendment will have small berms around <br />the bottom to trap eroded soil during a runoff event. These stockpiles will also be seeded within <br />6 months of creation using a suitable temporary seed mix. <br />For the above reasons, no discharge permit is needed for the site. However, the existing pit is <br />covered by an NPDES permit number COG-500549 for discharges associated with storm water, <br />in case any discharges were to occur from a newly created topsoil berm or other minor feature. <br />Vagneur Pit June 07 D-14