Gilpin observer., 1909-12-30

machine, which makes two, and a
new coke forge. which goes to indi-
cate that the company intends to
seriously attack the ore bodies the
coming months.
So extensive are the holdings the
company practically operates in two
towns, Black Hawk and Central, the
outlet for the mine cars is just at
the boundary line between the two
towns, while the mill is in the cent
raj part of Black Hawk.
The ores have varying value
from SIS up to 5000. Today all the ore
from the mines may average the for
mer while tomorrow they may have
returns of the latter or better. The
company operates it's own mill and
of course treats it's own ores except
the concentrates which are shipped
to the smelters.
The electric equipment of the COM
pany is on an extensive scale making
the working devices almost automa-
tic. The company operates one mile
of electric road requiring two elec-
trio engines. One is used exclusively
in hauling company ore and the other
for custom purposes.
The Newhouse tunnel will in no
way affect this property. This is
mentioned because of the water which
the company must handle on its own
account. There is an inflow of about
300 gallons a minute, but this is we'll
handled by an electric pump at 1,400
feet and another at 1900 from the
surface. The main pump is situated
at the incline at a station on the
ninth level of the Gregory vein. 1t
is a duplex, compound, condensing
steam pump, with four-suction and
four-discharge pots and is two
''stories" high. Its capacity is from
600 to 800 gallons per minute to a
vertical height of 1000 feet. There is
a duplicate OF this and two pumps
on the 665-foot level. The pumps are
in operation at all times or the mines
would suffer inundation.
The air plant is Corliss compound
air and compound steam compressor.
1t has a capacity to drive thirty-five
two and one-quarter inch air drills.
1t delivers air to receiver from
there it is conducted down the incline
shaft, through the 900 cross-cut to
the Fisk drift, thence to the Cook
shaft, about a mile from the starting
point. From there connection is made
with the line from the compressors.
There are additional helps to the re-
quirements of this department of the
mine.
The mine is equipped with three
compartment shafts, two operated by
hoist at the collar of the Cook
shaft and has 24O indicated horse
power. The third compartment is a
ladder-way used in emergencies, and
the air, steam and water pipes. The
first mentioned shafts have cages of
the most improved pattern. with
these car of ore from below need
be handled but once until it reaches
the mill, affecting a great saving,
To enumerate. the many other es-
sentials of this immense property |
would require volume.
AS a matter of record, the twenty
thousand dollar. retort of thirty-day !
run of ore in March last of the COM
pany was something that made old
residents wonder, and visions of a
boom loomed large. The retort weigh
ed 1,173 ounces. This run was exclu-
sive OF concentrates, that added. !
would have brought the product up to
a handsome figure.
The Fifty Gold Mines Co.'s Mill.
The operation of. this mill Is a
Black Hawk and has 80 ten hundred
and fifty pound rapid-drop stamps at
92 drops per minute. Here is where
the free milling ore is handled. That
native gold of the rock caught upon
the plates. Refractory ores are also
handled, they are mostly OF sulp-
hide nature. When this kind is put
through the mill 1t is mostly that 1t
may be concentrated, the concen-
trates being of class called smelt-
ing ore. The mill is so large that 1t
makes business of handling custom
ore: that Is, ore brought from mines
other than those owned by the com
pany. '..
Twenty-six concentrators of the
Woodbury. make are. constantly in
operation. The mill has capacity
of 400 tons, and about fifty thousand