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<br />3.4.A.7 RECOVERY RATES <br />Coal recovery rates are estimated for the 5 year mine plan area for <br />both longwall and room and pillar mining methods. Room and pillar <br />recovery rates are. based on historical figures from the F seam. <br />Longwall recovery rates are based on industry representative <br />numbers (Utah) and F seam development recoveries. <br />Estimated room and pillar recovery rates are shown in Table <br />3.4.A.28 and estimated longwall recovery rates are shown in Table <br />3.4.A.29. <br />TABLE 3.4.A.28 <br />B SEAM RECOVERY RATES <br />ROOM AND PILLAR MINING 1 <br />LOCATION <br />Main Development <br />Submain Development <br />• Panel Mining <br />Partial pillar extraction <br />Full pillar extraction <br />Overall B Seam Recovery 2 <br />TABLE 3.4 A.29 <br />B SEAM RECOVERY RATES <br />LONGWALL MINING <br />LOCATION <br />Main Development <br />Submain Development <br />Panels <br />Overall B Seam Pecovery2 3 <br />COAL RECOVERY <br /> <br />30 - 40% <br />30 - 40% <br />45 - 55% <br />FO - 80% <br /> 50% <br />CgAL RECOVERY <br />30 - 40% <br />30 - 40% <br />80 - 90% <br />70% <br />1 Approximated from historical F seam data. <br />2 Ass~aning only B seam or F and B seafns mineable (no F. seam between). <br />3 Based on Utah Indus fi <br />try gores. <br />• <br />