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ABRAX~S <br />S <br />III IIIIIIIIIIIII III <br />• EASTSIDE COAL COMPANY, INC. <br />r.°.Box161 RECEIVED <br />silt, Colorado 81652 <br />(3~) 876-2944 <br />April 24, 1991 pPR ? ~ 1~?1 <br />Mined wand <br />Reclamation Division <br />Dan Matthews, Reclamation Specialist <br />Mined Land Reclamation Division <br />1313 Sherman Street <br />Denver, Colorado 80203 <br />Re: Eastside Mine <br />Permit No. C-84-063 <br />TR-08 Mine Plan Update <br />Dear tor. Matthews: <br />The updated mine plan HGP-4 and new drawings depicting the layout of the <br />circular ramp (HGP-19 and HGP-20) are enclosed. Changes to the text are <br />also enclosed which may better describe the changes requested. <br />The structure contour lines and isopac lines of the E Seam were shown on <br />the previously submitted HGP-4 dated September 1990. The same information <br />is shown un the enclosed HGP-4 dated 04-23-91. <br />Calculations which show a factor of safety greater than one for an <br />extraction of 50Y are enclosed to be inserted into Appendix t4. These <br />calculations along with the subsidence report presented by Dr. Hucka in <br />the originaol permit are the basis of the 50Y extraction rate and angle of <br />draw of 25 . <br />The TR-08 revision did not include Figures 12 and 13 and Figure 14. These <br />drawings are replacement drawings because the originals were taken from <br />this office and are nut available. No changes were made to the drawings. <br />These drawings were already submitted and accepted by the Division. <br />Sincerely, <br />~J~"`' 1x7 <br />Stephen Sel <br />General Manager <br />Enclosures <br />• SS/11 <br />