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ENVIRONMENT, INC. PAGE 3 <br />NOVEMBER 27, 2012 <br />6. Please describe how the Operator will demonstrate the pit walls have been reclaimed to a final <br />grade of 3H: 1V for the portion of the pit walls which are beneath the static water level. <br />As noted above, MCAtee would most likely use a boat and elec- <br />tronic sonar to chart the slopes. Another method would be to use <br />a range finder and sounding line lowered from a boat. <br />7. Please provide the Division with a typical cross section which shows the final configuration of the <br />reclaimed slopes. <br />Figure AD -3 is a cross section sketch showing the final slope <br />configuration as you request. <br />6.5 Geotechnical Stability Exhibit <br />8. Upon reviewing the Mining and Reclamation Plans, the Division has determined that it will be <br />necessary to provide an engineering stability analyses for the slope angles during mining and for <br />the final reclaimed slopes pursuant to Rule 6.5(2). The Applicant has submitted signed damage <br />waivers for the surrounding permanent man -made structures; however, the Division has concerns <br />over the stability of the reclaimed slopes given the proximity to Interstate 76. <br />The Applicant shall demonstrate the long -term stability of the reclaimed slopes through an <br />engineering stability analyses. The analyses should utilize on -site soil strength parameters based <br />on available boring data. The analyses must account for any loading on the slopes from either <br />product/topsoil stockpiles or from equipment and must account for all slope configurations and <br />elevations. Please provide cross sections which depict the proposed offsets, stockpiles, and slope <br />ang!cc. Finally, the una,yses (Must rc.ider a safety factor. <br />Per our discussions McAtee Construction Co. will provided a <br />Technical Revision including an engineering stability analyses <br />for the slope angles prior mining south of the Edwards /Gill <br />Ditch. Said analysis will include information addressing the <br />properties you suggest in this question. <br />If you have more questions or need more information after review- <br />ing my answers please call me. Thanks for your help during the <br />permitting process. <br />Sincerely, <br />Environment, Inc. <br />V6eE. <br />Stevan L. O'Brian <br />President <br />cc McAtee Construction Co. <br />Morgan County Clerk <br />File <br />enclosures <br />