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sss <br />To 5~~ <br />RECEIVi <br />United St~~ttes Department of the Interior AUG 7 5 ~~y7 <br />13l'RE:\L' Or LAND ~(AN.\c:E~(r:~T Division of Minerals ~ _ .. <br />LII IIf Sn:I kf RC$Ulll cr :\I'C.1 <br />I?80 In dn.u'ial <br />(:raiK. Oululado Nlli_'S <br /> In Reply Ref e[ To: <br /> J450 (170) <br /> COC~081330 <br /> COC-54608 <br /> COD-OS2S47 <br />August 12, 1997 <br />Mr. Richa[d Mills <br />Environmental Manager <br />Twentymile Coal Company <br />29515 Routt County Road #27 <br />Oak Creek, Colorado 81467 <br />Re: COC~64608 Recoverable Reserves Adjustment; 6 Right Inby, 6 Right <br />Gateroad, and Submain Resource Recovery and Protection Plan (R2 P2) <br />Changes, Twentymile Coal Company <br />We have completed our review of three separate R2 P2 changes submitted by <br />Twentymile Coal Company. <br />Your request dated January 30, 1997, to reduce the recoverable reserves on <br />federal lease COC-59608 by 517,000 Cons is approved. The recoverable reserve <br />figure for this lease will be changed from the original estimate of 29,300,000 <br />tons to 23,784,000 tons. This change will be effective at the start of the <br />next continued operation year for lease COC-54606. _ <br />The second request dated June 17, 1997, concerns mining of the 6 Right Inby <br />entries. We conclude that this modification does not adversely affect maximum <br />economic recovery of the Federal coal resource. There is no significant <br />change to the recoverable reserves for lease COC 59608. Accordingly, the 6 <br />Right Inby Entries R2 P2 modification is approved. <br />The third request dated August 11, 1997, concerns minor modifications to the <br />layout of the 6 Right Gateroad and Submains. We conclude that this <br />modification does not adversely affect maximum economic recovery of the <br />federal coal resource. There is no significant change to the recoverable <br />reserves for leases COC-081330, COC-59608, or COD-62647. Accordingly, the 6 <br />Right Gateroad and Submains R2 P2 modification is approved. <br />If you have any additional questions, please contact Jerry Strahan at (970) <br />829-9991. <br />Sincerely, <br />Joh E.' Husba <br />Area Manager <br />cc: Larry Kline, OSM <br />Mike Long, DMG <br />