El Paso herald. (El Paso, Tex.) 1901-1931, 1912-01-11
MINING NEWS
BEGINS WORK ON
BIG Dam ACROSS PINAL CREEK

Z amount OF slime, and second. by apple
cation Of the roughing system, without
I classification. to remove the greatest
( possible amount OF copper from the
( slime before it is separated from the
sand and sent to the slime-treatlng
{ machinery, the best Of which is
VIGOROUSLY inefficient in recovering the
; metallic content from slime.
CurtaiIs Churn Drilling.
The Live Oak has curtaiIed its churn
J drilling operations, two drills having
/ been closed down during the past week
one drill is now running and is stated
to be in ore well above the average.
The station on the 900-fOot level in
no. shaft near the western end Of
the property, is virtually completed and
II is intended to begin drifting on the
the ore body, a drift is being driven
from No. shaft on the fourth level
and is reported 10 be faced in ore.
Raises are being driven from this level
on two of the churn drill holes.
Keystone Continues Drilling.
Churn drilling continues at the Key
stone under the supervision OF p. B.
Tinker, there being one drill in opera
ton. Keystone lies between Inspira-
ton and Live Oak and has q reported
ore reserve Of 100000 tons averaging
20 per cent copper.
AiamFs Output
The December output OF the Miami
Copper company amounted 10 nearly
34OO tons Of concentrates which should
yield over 1850 600 pounds OF refined
copper. Five units of the concentration
have been in operation since December
] and the sixth and last unit is eE-
pected 10 be running by Feb. l. The
grade OF ore mined and milied during
December averaged &c per cent cop
per. and the daily tonnage now being
handled is about $500 tons Of which
about ~ per cent comes from the
dump, 80 per cent from square-set and
sub-level caFinE operations 35 per
cent from development and the rest
from shrinkage slopes. At the east
side Of the mine, ore is being mined
by sQuare-sets and Sub-leVel cavlng,
and in the northwest part by shrinkage
Slopes, there being in this part of the
mine an available tonnage OF 2,740,000
tons. The total developed tonnage above
the 42O-fOOt or first Training level is
over 5000, 0O0 tons.
Development keeps pace with mining
averaging 1000 feet monthly The
cross cut from the main shaft. on the
5fU-roOt or second Training level is
in AS feet and has 250 feet more to
go TO reach the ore body. The equip
ment Of the pumping station at Burch
now consists Of two Aldrich triplex
pumps each driven by a 400 h. D.
motor and having a capacity Of 1900
gallons per minute. An air compress
scr has recently been installed to
furnish air for air-lift pumping in
testing some wells in the vicinity Of
the pumping station, one Of which is
now flowing at the rate Of $50 gallons
per minute and increasing.
Seven Hundred at Work.
The total number of men employed
is over zoo, Of whom $40 are employed
underground. 120 in the mill and the
rest in the power house shops, etc.
=. 3. GOttsberger is general manager,
n o, LaWtOn, mine superintendent and
F. W. solomon, mill superintendent.
Churm drilling continues on the
claims of the Southwestern Miami
Development CO. There is one drill
working and hole No ? is now 200
feet deep and going down steadily. The
formation being penetrated is the silf-
Gifted Pinal schist, the Characteristic
ore bearing formation in that vicinity
VIII Begin Churn Drilling.
The General Development company
a Lewiston corporation. which has
taken an option on the 26 claims Of
the Barney Copper Co, lying to the
northwest Of and adjoining the Live
Oak, for $500 600, is preparing 10 eX-
plore the ground by churn drilling
The churn drill is now being set up
over the 400-fOot shaft which is about
1000 feet west Of the east end line
Of the property and is reparted to have
a good showing OF copper carbonate
ore in the bottom. A hole VIII be
started in the bottom of the shaft and
the presence or absence Of chalcOcite
ore at q depth determined.
Old Dominion Production.
The production Of fine copper by
the Old Dominion fer December 1911 /
was 1857 GOO pounds, making the total |
for the year 26,50os000 pounds Of fine