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<br />Frank M.. Graham, Jr. <br /> <br />June 22, 1988 <br />2. Your discussion in this exhibit entitled "f{ydrology Report" <br />discussed six phases of mining with a maximum lake surface of 430 <br />acres across six lakes. However, other portions of the permit <br />application refer to five phases of mining, three final lakes, and <br />a total application acreage of 400.3 acres. Please clarify this <br />discrepancy. <br />:i. The"Hydrology Report" also discusses that water will be diverted <br />from Boulder Creek into Phase I, and then dischared from Phase YI, <br />in order to prevent stagnation of the lake water. However, I see <br />no Phase VI area on your maps. Please indicate on your maps the <br />inlet and outlet points. Are these permanent diversions? How will <br />these structures be stabilized to prevent erosion and siltation? <br />Exhibit J -Vegetation Information <br />The local Soil Conservation Service District conservationist <br />recommends that enough topsoil be saved to cover the above-water <br />slopes to a 2-foot depth. However, your reclamation plan calls for <br />replacement of only one foot. Considering that sufficient topsoil <br />can be salvaged from about 360 acres of land that will be below <br />water for use in reclaiming the 19 acres that will be above water, <br />and considering that the 2-foot recommendation was made by a <br />qualified soil scientist based on site specific conditions, I see <br />no reason to modify this recommendation. Please commit to <br />replacement of 2 feet of topsoil. <br />2. Please discuss how the two different seed mixtures will be used. <br />Specifically, where or when will the "Critical Area Planting" seed <br />mixture be used in preference to the "Irrigated Pasture Mix?" <br />Exhibit L - Reclamation Cost <br />1. As we discussed in the field, the reclamation costs must be based <br />on what it would cost our Division to hire a contractor to complete <br />the reclamation at the point of maximum disturbance, in the event <br />of operator default. The cost breakdown you provided is only for <br />reclamation of areas above water after mining has ceased. However, <br />additional factors which need to be considered include: <br />1) The cost of backfilling all shorelines to 3:1 slopes <br />including hauling, placement, and compaction; <br />2) The cost of dewatering the pit until shoreline backfilling <br />is complete; <br />3) Replacement of 24 inches of topsoil across shoreline areas; <br />