The Salt Lake tribune. [volume] (Salt Lake City, Utah) 1890-current, 1910-12-10
Engineer Gives the Inspiration
Very Fine Tonnage of
Copper Ore.
WONDERFUL WORK
OF THE COMPANY
Over Eighteen Million Tons
Opened in Less Than Two
Years.

sultins engineer OF the Inspiration Cop
per company, in which he gives decid-
edly gratifying estimate of ore reserves
! This splendid condition OF the Inspira-
ton territory is all the moro 10 be re-
marked. for the company has been at
work no more than one year and ten
months. nor, were the churn drills re-
mer OF 1903 Mr. Krunbs report is
dated November !. 1910. to which is The
following introductory statement by VII
nam Is; thompson. president of tho COM
panN. dated December j.
we have Just received a telegram
from Manager Drummond, stating that
on December |, 1910, the ore reserves
OF developed ore. averaging = per cent
copper. and 3.5o2 100 tons partially de-
veloped ore, making total OF is. is5. 900
oped ore, averaging 2 per cent copper"
The following is Mr.. Krumbs report
in full:
The mineral property of the Inspira-
eight 70 ten miles west of Globe ella
county. Arizona, and consists OF forty
claims; having an area OF $40 acres. The
extension of the Arizona Eastern railroad
mas been completed to within about one
mile OF the main tunnel OF the prop
erIy. The selection OF millsite is now
least three sources OF water supply avail
able within a radius OF about twenty
miles. The altitude at the mine is $500
feet. and the climatic conditions for con
tinuous operation throughout the year
are ideal.
The Inspiration ore deposit belongs
10 the class OF disseminated copper de-
posts similar TO those OF Bingham, Utah:
Ely. New. and Ray. Ariz.
The fractured and shattered condi-
ton OF the schist In the mineral belt
Afforded an easy channel for the mineral
solutions which caused the siiciHcation
OF the rock and deposited copper In the
form OF chalcopyrte and cupriferous py-
rite. Oxidation and teaching removed
rredeposited il al n lower horizon In the
form Of chalcocIte. producing an en-
riched zone. which forms the commercial
ore body. Tho oxidized zone is much
small cavities or vugs. which were for
merly f1lled with sulphlde minerals. This
zone snas. Is fr9m ON % 10 S5S feet thick, and
averages $50 feet in thickness. and is
underlain by the primary ore zone car
rying copper in the form OF cuprtferous
pyrItc.
Approximately $4,000 feet Of under
ground development work have been
driven on the property. The main trans
portai!on tunnel has a length of 2O75
and Scorpion shafts. About $50 feet
remain TO be driven TO a connection with
the Colorado shaft. The main develop
mcDt work has been done from the above
three shafts, and the orc body has been
opened for length OF 300 feet, while
With churn drills 1t has been developed
for length of 3Soo feet
The churn drill holes have been To-
Gated regularly AT the corners OF squares
with sides oo0 feet long. Up 10 this
date. nifty holes. with a total OF
!.lS2 feet OF drilling. have beer com
pleted. Roads aggregating 2seSo feet
In length have been built for the charm
drill operations. The accuracy OF the
ehurn drlll saamplins has been checked
Of the drill holes; and by the general un
derground development At different
times drifts and crosscuts aegrcgatlns
23a0 feet in length have been resampled
under my direction 10 check the sanipling
and 3Ssaving.
The Joe Bush shaft is equipped with
boilers and steam hoist. while the other
shafts are temporarily equipped WITH
gasoline hoists. Near the portal OF the
main tunnel there are 800 horsepower
boilers, and q 15-drill compound steam
compressor. machine shop is in the
course OF erection. II will be completely
equipped with lathe. drill press shaper.
bolt and pipe cutter. steam hammer,
etc. An experimental mill OF about sew
~ completed. II is fully equipped to
make exhaustive concentration tests. on
the results OF which the design of mill
having capacity of 5000 tons Of ore
per day Will be based
The ore reserves have beeD divided
into two classes. namely: Developed and
Is bounded either by drill holes or un-
derground workings not In excess Of eco
feet apart. In areas not YET completely
drilled, where the holes were up to 800
feet apart, The ore has been classed
as partially developed but no orc has
been allowed where the drill holes were
more than 100 feet apart, nor has any
ore been allowed beyond the lines CON
Meeting the drill holes. In blocks where
both drill holes and underground de-
velopment existed, values have been ay-
erased in proportion TO the lengths sam
pied. Up to October 20, ! estimate that
there have been developed IL. 3s6 ono tons
Of ore. averaging 2.G3 per cent copper,
and 5.so4.loo tons OF ore partially devel-
partially developed ore reserves $1,000, 500
tons. averaging 200 per cent copper
The total area developed and partial
! ly developed is 2o.9 acres. The area Is
entirely on the eastern portion Of the
company's property. and considerable ex-
tensions OF this ore body are practically
assured In the Woodson tunnel, on the
western portion OF the company prop
erty. there are several hundred thousand
tons OF ore developed. but this ore has
not been included in the above calcua-
! are that large ore body will be de-
veloped In this portion OF the company's g
| property In an area east OF the Joe
Bush shaft. the Gaping is only from
90 to 100 feet thick. and IL may be pos.
sible to mine the In this area by
open-cut methods In other portions OF
tRe ore pody. a caVlng system OF min
| Ing will he adopted
"A number OF factors enterting into
| the cost OF producing copper cannot be
definitely estimated al this time; bur
after carefully studying the character Of
the ore deposits. the amenablity of The
ore TO concentration, and the general
conditions affecting the cost Of mining
and treating the ore. | estimate that the
cost OF producing and delivering copper
in New York will be between . and 81
cents per pound. when the full plant OF
/ 5000 tons per day Is In operation Tile
production OF copper from plant OF the
above capacity should be about As 900. =
| 600 pounds per annum.
| Under Orc Reserves II has been
| stated that there are is 900, 900 tons of
ore developed and partially developed II
| Is practically assured that extensions of
the east ore body Will add large ton
mage to the known ore reserves. In the
! western part of the company's property
IL is known from the developments in
the Woodson tunnel and from the work
on adjoining properties. that there is an
other ore body in this section. but no
| drilling hos as vet been dOne In this ma RI