2007-07-09_REVISION - M1980085 - Laserfiche WebLink

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WELL AND WELL SHED - A small alluvial well approximately 46 feet deep is located north of the northernmost mining limit. This well supplies the site with water for road dust control, crushing and screening dust control as well as washing. The water is delivered to the mining area via a 3" diameter water line shown on Map C-2. The well is supplied with power from the neazby overhead power line from Holy Cross Electric. 6. Water Handling & Detention in Permit Area During Mining All water from the main disturbed area is captured in the pit, which is large enough to handle a PMP event. Water that does run off into the pit is absorbed into the gravel and becomes groundwater. The berm around the pit and the hillside to the east prevent any undisturbed runoff from entering the pit. The bottom of the excavation of the pit will be approximately 2 feet above the static groundwater table in order to ensure that groundwater is not exposed through the mining of the pit. The pit is intended to be a dry pit and as such the pit does not have a gravel well permit or any other required water permits. The expansion mining area will be mined from the east to the west, constantly maintaining a gradient of the disturbed area toward the existing pit, therefore, there is no need for sediment control ditches or sumps on the east side of the expansion azea. An existing dirt road is the eastern edge of the disturbed azea. A small gully immediately east of this road which drains to the north will not be affected by the operation. The existing 4650 feet long topsoil berm and the berm around the employee housing azea are well vegetated and have no significant signs of erosion. As of the start of 2007, many of the pit slopes have also been reclaimed, but import material has been significant and some of the slopes on the north side of the pit have been backfilled, covering the reclaimed slopes of 3H:1 V. Pagneur Pit June 07 D-13