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July 23, 2013 <br />Page 34 <br />Table 3. Summary of FE D2 and C Seam Physical Properties from Previous Highwall <br />Mining Studies <br />Location <br />Rock Type <br />ac <br />E, 106 <br />S <br />at <br />(psi) <br />(psi) <br />(0/0) <br />(psi) <br />C Upper roof <br />Sandstone (SS) <br />3,930 <br />- <br />Interbedded SS, Siltstone (Silts) <br />and Mudstone (MS) <br />7,130 <br />1.33 <br />All <br />5,530 <br />C Immediate roof <br />Ms <br />1,573 <br />- <br />85 <br />- <br />SS <br />981 <br />- <br />- <br />255 <br />Interbedded SS, Silts, MS <br />- <br />- <br />94 <br />- <br />All <br />1,277 <br />- <br />88 <br />255 <br />C Seam - ---- ---------- <br />Coal - --------------------- <br />2,004 <br />0.42 <br />- <br />- --- <br />C Immediate floor <br />MS <br />6,820 <br />1.86 <br />14 <br />220 <br />Silts <br />3,970 <br />1.11 <br />- <br />- <br />All <br />5,870 <br />1.61 <br />14 <br />220 <br />D2 Immediate roof <br />Carbonaceous MS <br />- <br />- <br />83 <br />- <br />MS <br />4,020 <br />- <br />- <br />- <br />Silts <br />8,420 <br />2.33 <br />- <br />400 <br />All <br />6,220 <br />2.33 <br />83 <br />400 <br />D2 Seam <br />Coal <br />1,498 <br />0.33 <br />- <br />- <br />D2 Immediate floor <br />Carbonaceous MS <br />- <br />- <br />97 <br />Mudstone <br />85 <br />All <br />88 <br />E Upper roof <br />Ss <br />5,502 <br />1.16 <br />- <br />- <br />Interbedded SS, Silts, MS <br />- <br />- <br />60 <br />255 <br />All <br />7,124 <br />1.63 <br />- <br />E Immediate roof <br />MS <br />- <br />- <br />95 <br />410 <br />Ss <br />6,578 <br />1.04 <br />94 <br />312 <br />All <br />6,578 <br />1.04 <br />95 <br />351 <br />E Seam <br />Coal <br />2,767 <br />0.31 <br />- <br />- <br />E Immediate floor <br />Carbonaceous MS <br />- <br />- <br />84 <br />- <br />MS <br />3,360 <br />0.90 <br />- <br />Silts <br />3,703 <br />- <br />SS <br />7,423 <br />1.87 <br />- <br />All <br />6,408 <br />1.39 <br />84 <br />fjjpp.eK.r of <br />Ss ------------------------ --------- <br />5,817 <br />- <br />- <br />------ -------------------- <br />- ...... <br />F Immediate roof <br />MS <br />62 <br />Silts <br />6,958 <br />1.19 <br />71 <br />All <br />6,958 <br />1.19 <br />66 <br />F Seam <br />2,931 <br />0.29 <br />F Immediate floor <br />Carbonaceous MS <br />2,750 <br />0.35 <br />93 <br />Silts <br />3,859 <br />0.59 <br />Ss <br />5,866 <br />0.93 <br />All <br />4,585 <br />0.62 <br />93 <br />All Sandstone <br />5,928 <br />1.08 <br />80 <br />331 <br />All Mudstone <br />- - -- - ------------------------- ------------------ <br />------------------ -- ...... ---------------------- <br />4,977 <br />1.17 <br />73 <br />193 <br />.... <br />All Interbedded SS, Silts, MS <br />39714 <br />0.58 <br />76 <br />348 <br />All Siltstone <br />5,373 <br />1.12 <br />71 <br />400 <br />Agapito Associates, Inc. <br />