MINEBK00979

• County: San Miguel
• Volume: 14
• Document: Inspectr
• Suffix: B

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r
itry roeY~quartz sad sulphides. The metals are
silver, lead, iini and copper. A11 of the vain
11ng is oonc~ntreting ores, with an average of #10.00
per toII. The production bA about 1200 tons per month.
SIIRF•ACE PL APT.
The surface plantn consists of one chart house size
40' high, 60' long E¢td 14 feet wide with an electric
hoist 26 H.P:, also en air coa~resaor•run by electricty
size 4 dT131. Power transmitted from Smuggler Union
Mining Company plant through x--30 aDio Watt transformers.
41eo boarding house; bunk house, blacksmith shop and pre
bins.
E E P L O S I II E S.
Du Pont 40~ powder. Bear fuse and 5-x•caps and wooden
tamping bars are use4. Explosives in excess of one dsga
supplq are not stored underground. The average atnourit of
explosives kept in storage lec 4000 pounds. This is kept
in a frame iron covered magazine situated about 200 Seat
from shaft house or anq other buildings and used Por
this purpose only. The device for thawing powder is a
galvanizefl iron double boiler for powder heater.
YIPIPO APD MZPE METRO DS.
The main opening is a shaft 375 feet deep. Nuapber one
level 16 166 feet from surface Kith drift running Sy
for a 4letanoe of 1100 feet with atoping going on In
this level at present time. Po. ?, level ie 265 feet
from surface with a drift running SL.for a distance
of S15 feet from slid shaft where work is still carried
on. PutID~er 3 level is '75 feet Prom surface with only a
station and a few feet•of'drifting drne. There le an
upraise being run from number one level through to
surface for air and an extra exit for employee. The
method of ore extraction le overhand stoping aped drift
ing with air and hand drills. Ingersoll atopera and B
104 man dritters•and ingereoll piston 4rills are used.
The method of timbering is atolls and square eats covered
with iag~ing. The timbers are red pine prepared by bend

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