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'.Prize - 4. .. - - . <br />, - E%PZ0 SIVES-Contin. <br />tampinC bars are employed., Explosives in exnesa.:oY one-:day!e: <br />supply are not 'stored vnderCround. _ _ - <br />- The average•amount,oY explosives kept in storage is 10U~. <br />-'Phis is. kept `in a small ,Prams:building, oovered with:aron sad <br />eitnate 400' east o* the~portal'oY.the tunnel. The.megazine ae <br />need Por the-etoraCa qY,powder only .all other.suppllee beinC <br />-kept.Sss a small:buLdinC Y60' _eouth o3' the".portal, of _thn tunnel. <br />Ho devioe'Yor thawing powder 'is provided as :the kind oP <br />powder used does not 'harden exoeps.in extrvaely:oold weathor.. <br />M I II I II G ~ M I H E M E T H O D S n <br />The mein:openinC Se a ehaYt 1,000' in depth. Dumarous <br />drifts and upraises were made Prom this ehaPt when worked dur- <br />ing previous"years. Ho work is oarried on at this,tiae Proa <br />tho eurfaoo v+orkinge but as eoou as the upraise is aompletod <br />Prom tho Hevrhouse tunnel the shaft will be planed in propor <br />condition and vrork vrill then bo oarried on Prom. the surfaoe <br />instoed oY through the tunnel, ae at prasont. <br />Aotiva work is oarriefl.an in tho upraise situate 160' <br />from the bewhottee tunnel in the lateral on the Prizo vein, Tho <br />upraise is 160' high. <br />~. <br />The method amployod•Por,hoisting to with.oompressod air. I ~ Jj <br />•~ ~ .J; <br />Tho man aro not raised and,lowerod vrith the hoisting maohinor,/. j ~ ~' ~~ <br />~ j~ <br />A load weighing 1,000~,in lowored at one time a flistanoe eP 160' I, {il` ~ <br />v+ith a ono-ha1P inoh steel wiro oable that has baan.in une one Y ~ !{,i ~, 1i <br />month. A safety hook,and ohain.ie.omployad a»d in Pantaned on ~ yl ~~~ (~ ~I <br />jfff <br />end oY oable vrith a olevioe. j ~' <br />iNaugh maohina drills era omployod and uomo singly hand ~ ~ ; ,~ <br />drilling is done. Seven-inoh nquare timbers are used Yor Drib- I' I) I ~~ <br />I ,~. <br />bang Uha upraise. The tiobera era good and suPPielant to insure '; i <br />eaYety, Undorgrotuid,tramtaing in done vdth nteel Darn and a mule. ; ~ ~ i~, <br />The goage is 16"rand T0~ T rails. Ooppreeeed air in uned Por van- <br />