The Salt Lake herald. [volume] (Salt Lake City [Utah]) 1870-1909, 1909-02-21
Mining and Mining Costs.

Superintendent Z. ". Durfees report
goes into detail of mine and mill opera
ton. 1t shows that development and dead
work for the year, exclusive of prospect
ing in ore, amounted to 4,SS3 feet, of
which 1902 feet were drifts, e61.5 feet
croSscuts, an7 $685. feet were raises. The
amount of ore mined during the year was
81, sos tons, of which 50.526 tons was mill
ing ore and 1,26s tons of shipping grade.
In commenting on the costs of mining
ana milling, Manager LamDOuTne says.
An analysis of the cost of ore extrac-
ton and concentration compared with the
previous year shows a marked and graft
operations The ore extraction was re
duced from $500 to SIT per ton. and the
cost of concentration from 95c to Sc per
ton. And it should be remembered in this
connection that these results were Sc
cured on a very much reduced tonnage"
Touching the important features of the
years operations In the property, which
has been one of development rather than
tried for, the general managers report
contains the following:
First in importance in development
work during the year was the extension
of the 200 or drain tunnel level. which
was advanced LIS feet to the southwest.
This tunnel parallels what is known as
the Ontario-Daly fissuTe, which has been
one of the greatest ore producing veins
In the district as well as being water
course of magnitude. In my last annual
report I referred to this matter in the
IOltONfHS
- The advancement of the main 1.9v0-
foot level westerly in the Dalv vein is
going II prove of great benefit to the
property. without counting a. all the ex-
cellent chance of encounteriug ore bod
les as the work progresses. This will
come in the drainage of vast area OF
ground above the tunnel level and also
make il possible for mining operations %
b. carried on below the tunnel level with
out much trouble from water
Ore Penetrating the Lime Beds.
THE recent results # this work have
knowledge gained since the above was
submitted confirms more positively ouI
regard for the Bonanza flat portion of
our territory into which we steadily are
reaching. not only on this vein, but 9TH
ers as well. This tunnel has been pene-
trating the lime beds where il has never
been certain that the ore would occur
The neighboring properties operating
along this vein found that the great ore
bodies made in and along what is known
as the Ontario quartzite, and ii has been
question whether. in the Daly-Judge mine
and along this same fissure, the ore bod
les would be strong enough TO urge their
way I'D into the lime beds, or whether II
would be necessary for us to reach this
same qUartZite before encounteling ore.
This Quartzite enters the Daly-Judge
mine near the 1,5O-foot level. Our shaft
is 1850 feet deep.
tunnel last year several crosscuts were
driven through the vein, three of which
developed ore. Two of these are men,
toned BY Superintendent Durfee in his
report the third being discovered at the
end of last month. The ore in this cross
cut is about four feet thick, and its pres
ent character and assay value warrants
cur belief that it will develop into ship
''The vein Is shown to be from 10 to IS
feet in width. and significant disclos-
IRE is the fact that the ore bodies make
| perpendieularly in the vein here the same
as has characterized the same in neigh
boring mines, and not in parallel bodies.
| This indicates that when the quartzite
zone is reached which is a formation
much more favorable for higher grade
ore, we can expect splendid results
Virgin Ground Full of Promise.
These developments prove that this
virgin ground is full of magnificent prom
Use. The fissure continues into the DaIy-
Judge territory for distance of about
| two miles. still retaining its Undertaking.
qualities and as bodies of ore are to be
! found on our 30 OF drain tunnel level,
our first work of consequence along the
Ontario DAILY fissure has been productive
of gratifying results.
| "R,lt had we not shown co0ciusively
| the existence of the ore in the lime beds,
| with the definite evidence of their CONT
ntity with depth. the tunnel work OF the
mast year mas beer of the greatest I'M
developed such flow of water that II IS
now consider I'd safe to commence work In
our lower levels to prove I'D the ore
shoots openeG above. Thus. the GRAIN
tunnel has demonstrated itself 10 De eX-
actIv what it's name implies