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Exhibit G <br /> Water Information <br /> The pre-mine site consists of rolling upland rangeland hills in the mine pit area.The operation is not <br /> expected to directly affect groundwater systems. No known aquifers exist within the permit area and <br /> groundwater pumping or dewatering is not anticipated.The Operator/Applicant will obtain all necessary <br /> National Pollutant Discharge Elimination System(NPDES) permits prior to any sand and gravel mining <br /> work,if groundwater pumping becomes necessary. More detailed information is included below. <br /> 1. Surface Water General Discussion <br /> The pre-mine site consists of rolling upland rangeland hills in the mine pit area.The slopes in the <br /> permit area vary between 0.5-10%.Surface water runoff is conveyed to the east off of the <br /> property.See Exhibits C-2 and G-2 for the general topography of the land. Irrigation water and <br /> associated ditches are not present on the property.The property is located approximately 1600 <br /> feet north and at least 100 vertical feet above the 100-year floodplain for the Gunnison River <br /> and all associated tributaries. <br /> Portable sanitation facilities will be provided to all workers at the mine site.These facilities will <br /> be located near the scale house.The waste will be taken off site for treatment in an approved <br /> facility by an approved and licensed contractor.There will be no leach fields or other means of <br /> sewage disposal. <br /> 2. Hydrology and Sediment Control for Mining <br /> No major streams or intermittent streams intersect the disturbed areas.As the permit area is <br /> uplands hills above groundwater, no groundwater pumping or dewatering will be required. <br /> Sediment control for the permit area is provided by the following items: <br /> 1) As the site is mined,gravel berms will be constructed on the downhill sides of active mine <br /> areas and stockpile areas to contain stormwater runoff. <br /> 2) All surface areas and stockpiles will be protected against wind and water erosion.Surface <br /> areas will be kept moist,or sprayed with magnesium chloride,to control airborne pollution, <br /> and all affected surface areas within the site will be graded to provide positive drainage <br /> toward the mine area. <br /> 3) Stormwater berms will be constructed along the downhill edges of each mining phase,as <br /> mining progresses.Alternate sediment control is planned utilizing a rapid seeding of quick <br /> growing oats.Since the berm will be seeded with the rapidly growing cover crop of oats <br /> followed by the permanent seed mix,the berm should stabilize quickly to minimize erosion. <br /> The sections of the berm that area seeded in this manner with oats will be immediately <br /> watered to provide quick vegetative cover. In addition,standard small size hay bales(50-60 <br /> lb size)will be installed in a tight row along the bottom toe of the berm,which will be staked <br />