The Goldfield news and weekly tribune. [volume] (Goldfield, Nev.) 1911-1947, 1914-08-15
JUMBO EXTENSION REPORT
Continued from Page One)

49,
says:
During the first five months end
ing May 81, 1914, S,653.39 wet tons
were produced, of which 6,234.71
tons were milled, and 2,41S.67 IONS
were shipped to smelters, from
which the net realization was $685.
i314.95. Sixteen hundred and nine
ty-eight feet of development work
was completed at a total cost of So
l717.OS, or an average cost Of $5.71S
per foot.
The mining and development costs
were S3.7S per ton, which includes
all stopping cost, and the amount in
doing 1898 feet of development
work. The cost of mining, develop
ing and milling, including market
ing of concentrates is $685. per ton
of ore produced.
The total operating costs, includ-
ing construction, are $7.16 per ton
of ore produced.
The only construction of import
ance during the five months was the
erection of the ore bins at the Pole
verda shaft. The cost of these bins
was s%1.O99.O3. The installation of
new transformers to replace those
destroyed by fire January 16, cost
~$1,521.05.
In the Poleverda claim 1,051 feet
of development work was performed
during the five months, which. to-
gether with Slopes, produced 6,42S.66
wet tons of ore averaging $25.977
per ton, or a total value OF $685.
UO3. 95 (mine sampled.
A new ore body was found on the
claim (4OO feet southeast of main
shaft on the 921-foot level, which
has produced $3.50 tons of ore, av-
eraging $13.12 per ton. This ore
body at the present time, appears to
be 40 feet in width. The height,
depth and length has not been deter
mined. There still remains a large
area of u~ndeveloped ground on this
level in this claim, which should be
very productive during the coming
year.
In the Velvet claim CAT feet of de-
velopment work was performed,
which, together with slopes produc-
ed 2,4S7.OS tons of ore averaging
S22.23S per ton, or a total value of
$55,419.47 (mine sampled.
Two drifts on different levels, fol-
lowing the eastern extension of the
Poleverda old ore body, have been
driven and exposed this ore body for
a distance of 23O feet. Further de-
velopment toward the northeast side
line of this claim presents great prob
abilities.
Development work is now going
forward with the view of locating
the downward extension of both the
Poleverda and Velvet ore bodies on
the 1017-foot level.
To open up the ore bodies, under
the conditions, in such a manner as
to render practicable the actual
measurements of ore reserves would
require a large amount of expensive
development work which would be
of little use for the purpose of min
ing IRE, and would entail additional
expense in keeping the workings in
safe condition prior to the removal
of the ore, therefore no attempt has
been made to block v0t tonnage so
as to permit of it's actual measure
ment. However, the development
work is of such nature that 1t ex-
poses ore on two or more sides that
justifes an estimate in reserve
amounting to 11,700 tons. The av-
erage grade can be approximately
placed as the same as that mined
during the past five months, or
$21.40 per ton.
In addition to the above tonnage.
some low grade r exposed on one
side only remains in the upper work
ings of the Poleverda claim, but it is
impossible to estimate the amount.
Present ore exposures and pros
poets for future development are
better than at any time in the his
tory of the mine.
During the year of 1913, 11,21O.26
dry tons of ore were mined, of which
1O,676.66 dry tons were milled and
$685. dry tons were shipped.
Three thousand four hundred and
sixty-fve feet of development was
completed at a total cost of $21,-
1871, or an average cost of $6.2S
per foot. This cost includes proper
portion overhead expense, in addition
to actual operating costs.
The mining and development costs
we're 1899 per ton. This includes all
stopping costs and the amoun eX-
pended in doing 3465 feet of devel-
opment work. The cost of mining,
developing and milling, including
marketing of concentrates, is $7.4'