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<br />Mr. Jay Lucas <br />August 19, 1981 <br />Page 3 <br />9) No portions of Stockpile Area 1 will be mined. The <br />present contours of this area show the stockpile of overburden <br />and topsoil removed previously. This overburden and topsoil <br />will be used to reclaim the final stage of mining. <br />Exhibit E - Reclamation Plan <br />1) The backfilled sand material and overburden will be <br />compacted by the heavy equipment, i.e. dozers, scrapers, etc <br />traveling over the deposited material. It is our opinion <br />that the material will be compacted sufficiently to prevent <br />future subsidence. <br />2) Soils on the steep slopes tend to erode rather easily. <br />That is the reason why there are so few naturally-occurring <br />steep slopes on the site. It is also the reason why erosion <br />control ditching is recommended for the steeper slopes. <br />Experience at other mines has shown these ditches to be very <br />effective provided their frequency is related to the steepness <br />of the slope. Page 20 of Exhibit E indicates that ditches will <br />be constructed on all slopes of 4 to 1 and steeper. Frequency <br />of the ditches increases with increasing steepness. Some rill- <br />ing on the slopes between the ditches can be expected, but the <br />deep 'banyons" that would form without the ditches should not <br />occur. In time, as the vegetation develops, the minor tilling <br />between the ditches should be controlled. <br />A great deal of thought and planning has gone into the care <br />and revegetation of the final slope areas of this project. We <br />believe the erosion control methods to be used on the 2 to 1 <br />slopes will prevent the problems visualized by staff. We hope <br />you will reconsider your recommendation. As for ROBCO's original <br />application for a 110 permit, it was written by the operator's <br />field staff who felt they were forced to use 3 to 1 slopes. <br />The operator's staff was not preparing a plan but rather was <br />complying with government regulations as they understood the law. <br />3) The small drainage located along the eastern portion of <br />Stage 11 will be reestablished after mining is complete. It was <br />omitted from the original drawing in error. <br />4) No shrubs are included because the site is primarily / <br />grassland. The only shrubs in any abundance are Mountain `// <br />Mahogany found on a steep, rocky slope and a number of other <br />shrub species found along deep water courses. No areas suitable <br />for Mountain Mahogany are planned to be produced. In time, <br />bottomland shrubs will invade. If suitable environments for <br />shrubs occur when mining is complete, the introduction of shrubs <br />will be considered at that time. <br />