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<br />Great Bonanza - 6'. <br />, ~. ~ .. l.r <, -. . <br />~ IHI IIG 8c MI IIE .EETHOD3 -Contin. <br />Praatios~].y,all the ground oa one side oY the ahaYt has <br />been,~atoped~oat by Yormer owners and also a part oY the other <br />side oY the/ahai:t. Where no pillars oY grcund are leYt Yor <br />, ~ _i.5' , , :: ~ .: . <br />e natural support snYYiaient timbering has been done to aeoure <br />.. . , .. <br />. , .,. <br />,... <br />saYety'. .. ' . <br />The ahai't ie not being sunk at Chia time. A;11Yt oY 100 <br />Yeet has gnat been completed: ~ - ' <br />9,7.3, winzea have .been properly. covered.: .. <br />The mine methods employed are overhand atoping and driYting <br />by means oY single head drilling. Mo machine drills are usod°. <br />The method oY timbering is atolls covered with lagging ,. } <br />poles, and are suYYiaient to sooure saYety. <br />,Timbers are prepared by hand,Yrom native pine, and are in'-` ~ <br />good,aondition. <br />ltc ,~ , <br />Chntee era loaded by hand and gravity.. . <br />,;Underground~tramning 1e done, by hand with b}~oketa run on <br />trol~.oys, wood Yrame. ' <br />TrsAkago 1s 18 in. gaage and 12~ T rails'. <br />Thera 1s no water in the mina to oontend vrlth, the water <br />Yor the boilers being supplied by the City or Central'. <br />i~h© yentila~ion is natuxal,tharo being oonneotions with <br />.' <br />another ehaYtr". <br />The sanitaY'y,oonditions aro unusually good. All old timbers <br />have bean removed Yrom the mine'. <br />the shaY~ ie di'1r~ded into two aompartmonta, ane oY them <br />being provided with~saYe and sooossible ladders and landings <br />ovary tWOnty Yoot apart'. In addition to the oxit through the <br />main ehaxt there ie also one through tho 3'oote and 8lmmona shaYt <br />about 6UU~Yaot east. Bath ®xite are oaeily aooaseiblo to the <br />omployos. <br />Candlos ura used Yor li~htinL' undorground• <br />~. <br /> <br />