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The settlement ponds will be approximately one acre in size, with 31-1: 1 V side slopes. <br />The overburden removed from the pond area will be stockpiled around the pond <br />perimeter. <br />Earthmoving for the sand and gravel mining operations will consist of excavating <br />the overburden soils, mining the sand and gravel, and backfilling the excavated <br />areas using overburden soil and imported site materials. The typical sequence of <br />operations is discussed in part (a) above. <br />(c) All water diversion and impoundment's <br />The project site is currently hydraulically isolated from up gradient and adjacent <br />property surface flows. Storm water currently drains toward the existing <br />abandoned sewer ponds. Flows surrounding the site are conveyed to the 33 Road <br />Ditch located west of the site. From there storm water is conveyed southwest to the <br />Colorado River. <br />During the mining and reclamation process, all precipitation within the project site <br />will be collected and remain on the project site. A drainage swale will be installed <br />along the west boundary line, which will collect and divert surface flows into <br />settlement ponds located at the southwest corner of each of the respective mining <br />areas. Drainage characteristics will not be changed affecting the site or adjacent <br />sites. <br />Mining for sand and gravel, and for a portion of the backfill operations, will require <br />• dewatering. A pump will be used to dewater the excavation pit area and <br />discharge into a new settlement ponds constructed near the southwest corner of <br />permit area. The settlement ponds will allow the sediment to drop out of the water <br />before it is discharged offsite into the 33 Road Ditch. The side slopes for the pond <br />shall be constructed at a 3H:1 V, and all overburden removed for the pond <br />construction shall be stockpiled around the pond perimeter. <br />(d) The size of areas to be worked at any one time; <br />Mining at the site will be progressive across the permit area, as discussed in part (a) <br />above. The area to be worked at one time will be limited by the ability to dewater <br />the area for mining and reclamation prior to being filled with ground water. <br />i 0