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yards of overburden presently exists on the North Mining Area and only 35,100 <br /> ' cubic yards will be required to reclaim the 14.5 acres at a topsoiling depth of a <br /> maximum of 18 inches. The operator will sell any excess topsoil/overburden <br /> during the life of the operation, or may incorporate it into areas of greater <br /> thickness, producing a more varied topography. The choice will be made by the <br /> ' operator. The required amount of growth medium (topsoil/overburden) will <br /> always be maintained onsite to ensure proper reclamation. <br /> ' South Borrow Pit Area: <br /> Fill material will be removed with a loader from this area to a maximum depth of <br /> approximately 15 ft. Slopes of the pit walls will be have a final excavation slope <br /> of 2:1. In areas of no previous disturbance, overburden will be stockpiled onto <br /> and extending the current overburden stockpile berm located northeast of the <br /> 1 planned excavation area (see Exhibit C). Overburden/topsoil will be re-spread <br /> ' over the 2:1 slopes of the pit and revegetated. <br /> ' The bench on which this borrow pit is to be located is underlain by an <br /> I <br /> impermeable layer of shale. This shale is located approximately 17 ft. below the <br /> ground surface. A layer of sand and gravel 1 to 1.5 ft. thick will be left on the <br /> surface of the pit floor to allow surface runoff due to precipitation to pass through <br /> the site and onto the floodplain of the Arkansas River, <br /> 1 <br /> 20 <br />