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• auge a ng and re clams[ion operatrons. Drainage from CLese holes will not be a problem as <br />discussed in [he Hyd wloyy Secrion. <br />For rule 4.[3.2(61 (tl), subsidence resulting from auger mining to any powerlines, buildings, or <br />other surface facilities is no[ predicted to occur based on [he enginee ri nq design analysis <br />condo r_t ed by SCC. The auger panel des iqn information is based un the engineering report entitled <br />^AUyer E'a nel Design Study Eor Seneca II-w and Yoast Mines, Seneca !'oal Company" prepared by Mr. <br />Gr some Boyd, Highwall Mining Services, Lir, of Brisbane, Aus[rali a. Mr. Boyd has prepared <br />numerous hi ghwall studies throuq hoot [he world and [I've pillar spacings between each auger hole <br />was based on a hole drarne ter of 5 fee Y. and a corresponding des lyn fa r_[or of safely c•f 1.50 for <br />pillar stability resulting in ze re sots idenc?. <br />Finally, rule 4.°3.2171 requires [het auger rni ni ng shall he cued uc[ed in seen rdance with [he <br />approved backfilling and gradrnu requi r=menu eE 4.14. No cha ny es to the curve n[ly approved <br />backfilling and grading plans are µ'opu sod due to the auger mining operations. <br />Geology <br />Site specific geology within and adsacent to the permit area is presented in Tab 5 of the permit <br />• application pac kay e. Mr. Boyd was given an eler_t ro nic wF.y of our geeloq L•, mode] rove a ny [he <br />prcpoe ed %iuyer caper at ic•ns aml scar n~rmdinq areas re condor r. his study. <br />Seam to be mined: Wad ge <br />Wadge Thickness: 8 [0 14' <br />Heiy ht of highwall: The hiyhwall In~rgh[ will vary from d0 Co 150 fee[. The ma r.i mum overburden <br />depth encompassing the auger r~rove ry area will be 40n Ee e[. <br />GenFral charac[e[ISi[i cs of [he s[r.,ra: The coal seam dips [c. the vest at 9° to 14°. ThF <br />nverbu rden ma [e real consists ma rely cC thin ro [h rnk sa nds[one r. and are interbedded wir P, ;hale:, <br />sil[stones, thin and thick. coal se.,m=. <br />H Yd ro logy <br /> The prupi•s ~d anger rtu Wing will rNnx,'.a a small portion of [he 'Wadge seam in comparison ru mu~r ng <br /> [hidt h3S al r~-ddy OcCUCrPd r1 F•ql e•1!Fld The 9Yl:Cl nrj mJnl Girl n•.1 W~]15 will b? US ed [o n i!:ni1.Or tGr <br /> any mea au ra ble yrou nd water rm~~a •'r-. ihiuuq ho u[ [he life of [hF mi Wing operation. Any arNlirinnal <br />• imps cLS Lo thF downgradrFni [9 .. i'1 <br />Ll <br />F <br />h <br />f <br />' ial aquifers from rho au4°r m!ning v111 b,. n=ylryrble <br /> °. <br />1uun~~asura <br />ur t <br />? <br />~~l l~~ <br />.: iuq <br />el . .v <br /> <br />