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'• The recoverable raw coal reserves for the 8 and 0 Seams is the 'mineable reserve base" minus the <br />' coal left in place for support (such as pillars, fenders, barrier pillars, etc) and minus the coal which <br />cannot be mined economically or technically, and minus the coal already recovered. <br />The B and D Seam mine plans (Plates 7 and 8) show the areas to be mined. The seam with larger <br />clean coal reserve potential in the areas of thin interburden (less than 10 feet) was given priority and <br />recovery from that seam is planned. Coal in the seam with the least potentially recoverable clean <br />' coal reserves in areas of thin interburden is considered non-recoverable. <br />' Recoverable clean coal reserves will vary as the amount of in-seam partings vary. Experience with <br />mining and washing the D Seam coal at the Deserado Mine indicates that clean coal recovery is <br />98% of the net coal thickness in the D Seam where net coal thickness is the D Seam thickness <br />minus the thickness of any partings. It is estimated that about 959'0 of the net coal thickness will <br />be recovered. D Seam clean coal reserves are 939a of the D Seam raw coal reserves. <br />Recoverable raw coal reserves in the B Seam are based on the net coal thickness also and do not <br />' include parting thickness. As no B Seam production or washing has yet occurred, the recovery of <br />B Seam can only be estimated. B Seam recovery is estimated at 959'0 of the net coal thickness. <br />' Because of thin interburden and better reserves in the D Seam, no coal will be recovered from the <br />B Seam in leases C-0126669, D-047201 and C-44693. <br />M Table 4-6 summarizes the recoverable raw coal reserves and clean coal reserves by lease for the <br />Deserado Mine Logical Mining Unit. <br />' 4.4 Abandonment and Recoverable Coal Reserve Protection <br />' As per CFR 43 Subsection 3484.1(c)(6), 50-foot property barrier pillars will be left in place at the <br />LMU boundary to protect any coal reserves surrounding the LMU. <br />1 <br />1 <br /> <br /> <br />1 <br />'• 30 <br />1 <br />