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<br />~ Nelson - 5,
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<br />~ s ~iiu<. ; M Z R I $ (z' Y,c M I 17 E METH 0 D S- Contin. '
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<br />~.';1 Bard Creek tunnel is under the R].inor drift an upraise will be
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<br />'{''i mado for air and exix,
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<br />l ~ ~(~ ~ The method or ore extraotion is by drifting and stoping,
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<br />~;;~ Up to tho time oP this inspootion single hand drilling has been
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<br />ffEE~;•E;i ~ employed but the new power plant has ~uat boon ooranleted and
<br />'!~•~~ -InL'ereol Hand maohine drills will bo employed hereafter.
<br />~ ~~~ ±' ~ .The method of timbering in the tunnels is !
<br />' posts and Capa.
<br />~~~.:'~i 3tulls are used for the drifts sad ato es. The timbers are
<br />pro- .
<br />~~ 1~, E~ pared by hand Prom pine, are in good condition and auffioS,ent
<br />is ft'~t ~ to seoure eaYety.
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<br />;(S( IInderground tramming is done with ateol oars,- George-
<br />~'~~+~t~l r~ ` town, Colo, mako, The traoknge is 18^ guage and 8~ T rails.
<br />•~~~~•ji' The natural syatom is employed ror drainage, tho tunnels'
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<br />~~, ', ~ '! having a uniform Crado of 190. The amoiult or water to bo doalt
<br />,~~`;~~ ~ ~ with is small.
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<br />`j (( I The syatom employod Por ventilation in tho 17elson tunnel
<br />,~•~!i! ie an a-itt. pipo with a hood on top, Tho Bard Croek tunnol ie
<br />~ ,~yi '~~" not Par enough in the mountain to interfere with the ventila-
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<br />tion and no noxious gases aro mot with in eithor,tunnol.
<br />`, ~j All old timbora havo boon removod Yrom under
<br />', ,; !~ ground and
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<br />'~ ,+ the sanitary oonditions are good. Candles aro used ror light-
<br />.`~ .k ing undorgrannd,
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<br />}ttl ~ STATI3TI CS.
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<br />"{~i ~ ', Totn1 number of feet in tunnols, 316,
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<br />•`~ ~~~ " drirts, 4UU.
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<br />#!'.`~~ ( Thorn are rio shafts on tho surface exoopt those sunk
<br />~j~' ~" for tho
<br />;;,:!;: f piu'Poao of looatione,
<br />~ ,' i ' IJo oro has boss
<br />';ii ' + Produoed ea all rork has boon ooafinod
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<br />r ,~, to development.
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<br />,~~'~ s Avoraee unsay vulva or oro per ton. r.',0.
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<br />'~~( ~ ~ Coat per tea tranoportinC ors, _
<br />z . ~?2 b0
<br />,~~ai Cost per tea treatment ore; ooaoontrating, a'1,2b~ eaelt-
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