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1 <br />i <br /> <br /> <br /> <br />EXHIBIT D <br />S~ MINING PLAN <br />Quarrying at the Hart Rok Redi Mixt Main Pit has been <br />underway for about 21 years. The present operator has <br />been quarrying since June of 1972• Production since June 1, <br />1972, has resulted in the disturbance and mining of approx- <br />imately 3 acres. <br />Quarrying is accomplished with front-end-loaders load- <br />ing onto trucks for a short haul to the 'ready mix plant. <br />The quarrying operation generally consists of widening <br />and deepening the valley of an intermittent stream and <br />removing the sand and gravel from the sides and bottom. <br />The mining plan is to remove existing topsoil from <br />virgin ground and add it to the existing topsoil stockpile <br />near the north end of the pit, followed by excavating the <br />exposed sand and gravel. <br />The quarrying operation is currently advancing to the <br />1 <br />I <br />i <br /> <br />north and east, removing an old access road and widening the <br />pit at the north end. Sand and gravel is removed from <br />near-vertical walls standing at heights of approximately <br />10-15 feet. At the conclusion of excavating the present <br />bench, the operation will move to the lower end (north end) <br />of the pit and begin a second bench contained within the <br />D-1 <br />