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January 2, 2020 Page A-4 <br />Agapito Associates, Inc. <br /> <br />Figure A-1c. I Pit, F Seam Recovery Chart <br />45 <br />50 <br />55 <br />60 <br />65 <br />70 <br />75 <br />80 <br />85 <br />50 70 90 110 130 150 170 190 210 230RAW RECOVERY (%) DEPTH OF COVER (ft) <br />3.0 <br />3.3 <br />3.6 <br />3.9 <br />4.2 <br />4.5 <br />4.8 <br />5.1 <br />5.4 <br />5.7 <br />6.0 <br />6.3 <br />6.6 <br />Mining <br />Height <br />(ft) <br />534-40 Trapper [534-40 Trapper_Design Charts18JUL2018.pptx]:dc/smvf (7-18-2018) <br />Design <br />Depth of Cover (ft) 3 3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4 5.7 6 6.3 6.6 <br />50 81.2 80.8 79.5 78.2 76.9 75.7 74.5 73.7 72.6 71.5 70.4 69.3 68.3 <br />65 78.1 77.2 76.7 76.3 75.6 75.2 74.0 73.2 72.1 71.0 70.0 68.9 67.9 <br />80 75.3 74.4 73.6 73.1 72.7 71.9 71.5 71.2 70.5 70.2 69.5 68.5 67.5 <br />95 72.6 71.8 71.0 70.6 69.8 69.1 68.7 68.0 67.6 67.2 66.5 66.2 65.6 <br />110 70.5 69.7 69.0 68.2 67.5 66.8 66.1 65.4 65.1 64.4 63.8 63.4 62.8 <br />125 68.5 67.8 66.7 66.0 65.0 64.4 63.7 63.1 62.4 61.8 61.5 60.9 60.3 <br />140 66.5 65.7 64.9 63.9 63.3 62.4 61.7 61.1 60.3 59.7 59.1 58.6 58.0 <br />155 64.7 63.6 62.9 61.9 61.2 60.5 59.9 59.1 58.5 57.7 57.2 56.4 55.9 <br />170 63.0 62.1 60.9 60.0 59.1 58.5 57.8 57.2 56.6 55.8 55.3 54.6 54.1 <br />185 61.7 60.6 59.4 58.4 57.6 56.6 55.8 55.2 54.4 53.9 53.3 52.8 52.3 <br />200 60.5 59.1 58.0 57.0 56.0 55.1 54.1 53.4 52.6 51.9 51.2 50.7 50.3 <br />215 59.0 58.0 56.7 55.7 54.5 53.6 52.7 51.9 51.1 50.3 49.7 48.9 48.4 <br />230 57.9 56.6 55.4 54.4 53.3 52.3 51.4 50.6 49.8 48.9 48.2 47.4 46.9 <br />Coal Strength (psi)540 Mining Width (ft)11.50 No. Web Pillars 19 <br />Mining Height (ft)