MINEBK00494

• County: San Juan
• Volume: 14
• Document: Inspectr
• Suffix: A

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~'j about 200 feet from shaft. The de^ise for thawing ponder
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Vii, is a double hot water boiler.
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~ 2f I N I N G AND M I N E METH O D S.
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i : ~ ~ 'j'i The main opening is a shaft 143 feet deep. Work 16
1 ',~'~>';~ carries on at. the present time in the 14Sd toot level
., north. fen are lowered and hoisted by hoisting machinert*.
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About 200^ pounds are hoisted at one time for a distance
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of 143 feet. The cable is new. Ths cage hook is fastened
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p ge quipped with sheet
at. to of head frame. The ca is e y
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clutch, which is tested every week. The materials are
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, holFtsd only Prom ons lsvsl. A 3~8 inch rope and bell
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-.E;j1 are used for •signalling. Cods u99d 16 the rolorado
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M' ~' Code. These signalF are posted in engineroom, collar of
~`;J'_ shaft and at each level station. Persons are allowed to
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,` f ride on loadec. cage. Ths skid way for the cage is 4 R 4.
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k ar:B. mill holes
~',i` s . All winzes dare corered and surrounded by guard rails.
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:,,;I~. The method of ore extraction is overhand stoping, with
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1 Ingersol and 3 'laugh stopera. The method oftimbering
is stubs anc'~ aeuare sets. The timbers are pine and ^pruce.
Steel cars are used in tramming. An electric pump is used
in draining. The system of ~•entilation is nQturai.
~~ The shaft ifi divided into two co
mpartments, one ladder-
way the other for cage. The atEam the *iT and water
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~ ~ pips are in the ladder way. Landings are 20 Peet a pars
~j; The t~TO le~~els are conne cted b~• manv.~a?~s. Electricity
and candles nre used for lighting unflerground•
S T A T I S T I C S.
Total number of feet in ahafta 240, cost per ft. $100.
' Tot el number of feet in tunnels 2000 cost per ft. $20.
Total number of feet iri levels 5000 cost per`ft. $S0.

i• Total number of feet in cross-cuts 250, cost per ft $25.
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t Total nuwbsr of felt in raises ?,50 coat per ft. $75.

'f ,I C ost. cf f1xe1 $12.00 per ton.
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• Cost of timbers $.08 per foot.
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I~ ~~ Coat of po~ider $.20.