Gilpin observer., 1903-07-16
Open an Old Group
and Metals for July says:

.es and Metals for July says
In few days another group of prop
critics will be added to the shippieg list
Of Gilpin county, and not only will they
be shippers Of high grade smelling ore,
but heavy tonnage OF concentrates will
be added from a new mill erected by the
operators. The properties are owned
and operated by the Nevada Consolidat-
ed Gold Mining and Milling Company
and cover approximately 100 acres at
Nevadaville. Through the group pass
seven known veins, some OF which have
already been orened.
In the group are several mines that
had been abandoned by their original
owners upwards OF twenty years ago, be
at that time the values we're not rich
enough to bring a profit after paying
the mining charges of those days. as we'll
as the wagon haul from that place to.the
smelters at Denver, and the heavy smelt-
ing charges. With the advent OF cheap
er methods OF handling ores came great
awakening in Gilpin county operations
and each year is adding to the list OF
shippers, and the economical milling
methods are also very materially aiding
in advancing the years total output.
This company composed OF Denver
business men, has for year past been
<giving close attention to development
work on three Of the properties, par
ticularly. The deepest workings are
$50 feet, and drifts from 20 to 375 feet
long have been run, yet none of the
levels have been exploited below the
fourth. The veins are from three to six
: teen feet wide. Superintendent A. NJ.
Rucker made a report last week on the
ore actually in sight, blocked out and
ready fol, shipment in the present work
ings, and states there are 64,s23 tons.
having a gross value Of e783,2Sl. A
most conservative estimate has been
placed on the average value per ton, FOR
the assays run from 81 to s75 per ton.
The conditions Of the past two months
were gratifying enough to warrant the
erection Of mill for the concentration
Of the lower grades OF ore, and mill Of
fifty tons daily capacity, built by A..
Tetrault OF Denver. will be in operation
by July Goth. The mill is SO constructed
that it can be enlarged to double it's
capacity with nominal additional ex-
pense.
The building enclosing the concentra-
ting plant is sixty five feet long and fif-
ty-fve feet wide aud three stories high
One engine is set to run the stamps and
, crushers and another to operate the con-
centrating tables and the amalgamating
plates. This latter operation will no
doubt surprise the mining and milling
fraternity, but will be explained later
on. A battery OF ten stamps and two
crushers are SO far installed. The stamps
are known as the Tetrault twin stamps.
and it is claimed for them that pair
will pulverize fifteen ton of medium ore
per day, requiring but two horse power.
The drop is regulated at will from one
to ten inches, the blower regulated to
suit the ore, from 100 to 1000 pounds.
and the speed can be regulated for $50
to 600 strokes per mute.
After leaving the crusher all the oper.
atoms are automatic. The ore is fret
carried to the stamps and from the
stamps to copper plates lying with the
same dip, almost fat, like Q conceutra-
ting table. The object Of this method
OF construction is to catch cot only all OF
the FREQ gold, but all the -four gold and
rusty gold as well, for by agitating the
plate the quick will find chance to
catch the rusty gold IN some exposed
position. This form Of plate is the idea
Of MIR. Theodore Marx, the president ol
the company, who is arranging 10 secure
apstent.
From the plate the ore is carried BY
gravity to the concentrating tables
Ave in number, patented by Mr.. Tet.
ault. They work just opposite from
other tables. These tables will make
two savings: first, the gold, silver, copper
lead and iron into one product: second
the zinc and part Of the iron into 40.
other. The ore carries an average OF a.