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TECHNICAL DISCUSSION <br /> The objective of this proposal is to present a program designed to <br /> measure and analyze the response of strata to mining of a thick coal seam <br /> by multiple lift longwall mehtods. The following technical discussion <br /> outlines the engineering approach Mine Subsidence Engineering Company pro- <br /> poses to complete the required work. To attain the aforementioned objective, <br /> the total effort has been broken into five major tasks. The proposed program <br /> schedule showing the timing and execution of these tasks is shown in Figure I. <br /> Task I - Proposed Site <br /> One requirement for responding to this RFP was that the contractor pro- <br /> vide a site where the investigation of surface subsidence over a c _�ltiple <br /> lift mining operation could be conducted. A.t the Present time, only one mine <br /> in the Uni ted States i s conducti nc mul ti-1 i IF i ong,,;a11 -i n i rng of coal . in <br /> C_nn4unC-,_ion ,,Jth t,h—_ ')?P_rt,m;ent of Energy, Is <br /> conducting a multi-lift demonstration at their No. 3 ''.ir,e in the Coal Basin <br /> area near Redstone, Colorado. Mine Subsidence Engineering Company has obtained <br /> access and permission to perform the proposed subsidence investigation on the <br /> surface over the No. 3 :tine from MH d-Continent Resc•ur�:es , inc. A letter <br /> providing this access is included in Appendix A. <br /> Site Location: <br /> Th_- pr wed mi:, sita is Ioc a pp rox i y IrU ,.,il _1 or Ce,, , <br /> Colorado. The No. 3 Mine is one of five mines opera-:s-d by Mid-Continent <br /> -3- <br />