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• e. w/d critical width <br />375 __ 3.125 @ rec. line 1.3 x 120' = 156' <br />• 120 <br />500 __ 1.35 @ depth 1.3 x 370' = 481' <br />370 <br />f. expected maximum subsidence with full extraction is 90X of <br />mining thickness or .9 x 48" - 60" = 43.2" - 54.0" <br />g. expected range in subsidence, if subsidence occurs, based upon <br />subsidence studies in Illinois @ 80% extraction is: <br />18% x 48" - 60" = 8.6" - 10.8" <br />6.5% x 48" - 60" = 31.2" - 39" <br />h. Area U2 is not overlain by a renewable resource. <br />B. Fault Block 3 <br />(3 seam mining) <br />• 1. Scam thickness range <br />a. Zone 3 upper bed - 48" @ depth - 84" @ outcrop recovery line <br />b. Upper Pinnacle bed - 48" @ outcrop recovery line - 52" @ depth <br />c. Lower Pinnacle bud - 50" @ depth - 60" @ outcrop recovery line <br />2. Approximate range in depth of cover <br />a. surface to 7.nne 3 upper bed - 80' @ outcrop recovery line - <br />250' @ depth <br />b. top of Upper Pinnacle bed to bottom of Zone 3 upper bed - 190' <br />c. top of lower Pinnacle bed to bottom of Upper Pinnacle bed - 40' <br />3. Maximum width oC extraction • <br />a. Zone 3 upper bed - 1050' @ recovery line - 1300' @ depth <br />b. Upper Pinnacle bed - 700' @ recovery line - 1200' @ depth <br />c. Lower Pinnacle bed - 650' @ recovery line - ]200' @ depth <br />4. method of ndninq - same as Fault 87ock 2 <br />S. w/d critical width <br />a. 7.one 3 upper bed <br />7050 __ ]. 3] h~ re~•~wery line 1.3 x 80 = ]04' <br />80 <br /> <br />Z~ S <br />D. H. EMLING COMPANY <br />