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least forty feet below the present surface elevation. At that time, an evaluation of the <br />quartzite's hardness, weathering performance, and rock competency can aid in the <br />formulation of fmal dimensions of upper and lower bench runs for DMG technical review <br />and approval. At this time, the operator requests an approval of the basic highwall <br />control plan as submitted with commitment to additional geotechnical testing and <br />evaluation prior to final bench dimension specification. <br />37 <br />