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-J- <br />Subsidence - 2.05.6(6) <br />The amended application includes a brief subsidence projection and <br />evaluation, including a Wilson method pillar stability calculation based <br />upon testing of coal compressive strength. The calculation determined <br />a pillar stability factor of safety of approximately 1.3 under the heaviest <br />applied overburden thickness loading above the proposed underground <br />workings. <br />The applicant indicates that no structures or renewable resource lands, <br />other than grazingland, exist within the area of possible subsidence <br />affects. The Division concurs with this opinion, and as such this <br />section of the amended application is acceptable as it exists. Therefore <br />the applicant will not need to develop an appropriate subsidence control <br />plan or subsidence survey evaluation with monitoring program. <br />If.you have any questions concerning these items, please feel free to <br />contact me. <br />Sincerely, <br />i~,~~ <br />Tom Gillis <br />Reclamation Specialist <br />TG/ep <br />Ii I <br />