The Salt Lake herald-Republican. [volume] (Salt Lake City, Utah) 1909-1918, 1910-07-01
FIND COPPER ORE
IN OLD YOSEMITE
Draining 800-Foot Shaft Dis
closes Valuable Mine in
Lowest Level.

Work accomplished during the last
year by the Yosemite Mines company,
the results of which have only just be-
come apparent. has proven that a cop
per mine of no small proportions ex-
lists in the lower levels of Yosemite
mine No. 1, which was abandoned
eighteen years ago on account or a
strong flow OF water coming into the
workings.
The old mine was worked for the
nigh-grade lead-silver ore which was
FOUND in the upper levels, where, with
out doubt, quantities OF that kind OF
production in the years that Il was
operated are not in possession Of the
present owners, but reports Of the
United States geological survey ac-
credit IL with production Of 90. 900 tons
OF ore, the average contents Of which
were 50 per cent lead, IA ounces in sill
yer and S1.40 in gold.
The property was worked through
an inclined shaft to the depth OF 40
Ieet. Pumps were Installed, but at the
depth of 500 feet the flow had become
so strong that IL was regarded no
longer an attractive project. Arriving
at that conclusion was aided by the
TO oopper-irOn sulphides. Even though
the copper contents is relatively high,
me penalty imposed by shelters in
those days upon copper ore was so
great as TO render mining IT unprOflt-
With the pulling Of the pumps from
condition ii remained until within the
last few weeks. And so frequent are
the changes Of personnel Of workers in
mining camps that the new owners
were unable to find anyone who could
remember emf just what was The CONDITION
they were abandoned.
Long Drift Drains IT,
The Yosemite Mines company was
formed year ago, with large interests
Of the Bingham Mines company in
mines. including the Yosemite, the
Cluster and the Mississippi. The prin-
cipal work of development undertaken
Mascotte tunnel to cut through the
porphyry dixie which held back the
water in the Yosemite shaft with
machine drills constantly employed in
the meantime, the drift 1900 feet long.
had the middle of last April passed
phyry., 1t had then reached point
almost directly underneath the inclined
shaft with a depth Of approximately
LOO feet from the surface on the
Since that time the old workings
have been slowly draining, until a few
to gain access through the shaft to the
SOO-fOot level. The upper levels are
caved to an extent which has prevented
exploring them. but the shaft and the
500 level are I'm fairly good condition.
Track rails were found to be literally
'streaks Of rust orumbling to the
intact. And in that level was found
high-grade copper ore so strong and in
such quantity as to lead the manage
ment to believe that the Yosemite is
destined to become one OF the large
producers Of Bingham.
Pushing of the work which has
brought this disclosure has been at
tended by sufficient uncertainty and
disappointment to have completely dis
COuraged many mine Arrangements. and
for that reason Manager liner PETIT |
and superintendent J. Z. Bergh, who !
long drift on its course, are receiving |
more than the ordinary quota OF con- !
CALCULATIONS.
VIII Equip Old shaft.
The company is now in position to /
proceed with mining upon an extensive
scale, with definite results assured. IL |
is likely that the old shaft Will be
ing will be carried on through that |
working. The making Of connection |
with the Paradox tunnel, which would
strike the Yosemite workings at the
500-foot level. viii be an easy matter.
The company has during the year made !
tunnel which Is on the opposite side
OF the mountain from the Mascotte !
tunnel A raise OF 1.400 feet being re-
quired TO connect the Yosemite shaft |
with the drift from the Mascotte tun- |
mel. that work will await further de- |
velopment Of the ore bodies.
The Yosemite Mines company's es-
tate is in a strongly mineralized coun- |
try. The Lark Yosemite vein. the |
7 cad Mine vein and the Brooklyn vein |
course roughly parallel to each other |
through that section of East Bingham. |
tension OF the Lead Mine vein are in
Yosemite ground.