MINEBK00804

• County: Boulder
• Volume: 12
• Document: Inspectr
• Suffix: A

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Inter-ocean - 6. _

MIIII liG & MIRE METHODS-Contin. •

rune on the bed plank. All level stations are provided with il..
passage-ways around tho working shaft but guard rails are not ;~~~
• used. The shaft is beonred b"y pillarb of ground on each side
' sufficient to secure safety butwinzes are not covered.
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' The method of ore ektraction'is overhand stoping and _,~
• drifting by means oY 5ullivan pistoa, 2g, wisugh and Climax "~
- machine drills and single"and double hand drilling. i'~
The method of timbering is poste and caps and stu7.la oov- t
Bred with lagging. The timbors are prepared by hand from pine
• ~ i
and spruce, are in good condition and sufficient to secure ~ ;~,!~
safety.
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Chutes are loaded by hand and gravity.
Underground tramming is Bono by hand with steel bnakets ;t
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and mood trollies on a traokago of 18" guago and 8g ~ rails. ! ~

'Phe average amount oY water dealt with is 15 gallons per I
~i J
minute: This ie raised by means of a 7~" x 4" a 7" steam pomp ;~;
stationed at the 400-ft. level'and n Ho. 6, sinker Cameron `; ;

steam ptmp stationed at tho 60U-Yt. level. Capacity of pampa i
~'j
is 72,000 gallons evory 24 house.
Tho ventilation is natural and sufficient. Ho noxious `i
gaeos are met with. j~ ~~~~
Tha sanitary conditions 'vrill be good as soon ae all of
tho muck ie cleaned out. This tho managomont is doing as rap-

idly as possible'end arc oleo removing all old timbors at the j

'
same time.
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S T A T I S T I C S F

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arose tonnage to sate. zbo.ooo. (
Avorage tonnage per month, 1,000.
~ Average assay value of emeltiag ore, ~b0~. •
- - ~ w • willing ---

Coat per ton mining oz ore. Aso.
" " •tzenHporting ore. a2.:.0.
" " treatnoat of ~amalting ore, i9. .