The Oroville weekly gazette. [volume] (Oroville, Wash.) 1905-19??, 1913-02-28
VALUES HOLD TO DEPTH
Ore Enough Blocked Out to Keep 30
Ton COncentratOr Going for
Two Years

The shaft on the Ruby mine has
reached a depth of $50 feet on the
ledge, the deepest development of the
kind in this upper country, and
crosscut and drifts at that depth show
the ledge to be strong and in place,
with good sized ore body carrying
average values of better than $15 to
the ton.
The Ruby has been developed in
systematic manner and the workings
have already uncovered enough ore
averaging from $15 to 500 per ton to
keep a thirty-ton concentrator run
ming full time for two years The
management, feeling that sufficient
development work has been done to
demonstrate that the Ruby is mine
in fact as we'll as in name has ceased
underground operations pending the
outcome of it's present efforts to Sc
cure funds with which to install a
concentrating plant.
The first work done on the Ruby
was the driving of an adit from the
discovery 1877 feet in on the ledge.
Pay ore was not encountered all OF
the way in this adit but the ledge was
shown to be strong and in place
throughout. Two upraises to the sur
face were made from this level, one
AZ feet and the other 62 feet. Two
other additional upraises were made
from the adit that do not reach the
surface, but extend upward 6S and 75
feet respectively.
The next working was a crosscut
tunnel started down the hill at a ver-
ticle depth below the adit of 80 feet.
This tunnel was driven PIP feet to the
ledge, and drifts were run from the
crosscut, 500 feet to the south and
3S9 feet to the north, showing the
ledge still in place and we'll defined.
Seven upraises were driven from this
level to the adit level, each 80 feet due
to the slant of the vein.
After this work was completed what
is now the main working tunnel was
started down the hill at verticle
depth of 800 feet below the first cross
cut tunnel. The main tunnel was
driven into the hill 1O11 feet and
crosscut the ledge at distance of
951 feet. On this level the vein was
drifted on 146 feet to the south and
3S3 feet to the north. Twenty feet in
<1,1 @,,nv chn IN hn n
upraise has been driven through to
the upper tunnel level distance of
AIS feet following the dip of the vein.
One hundred feet above the main tun-
mel level on this upraise drifts were
run on the ledge 1853 feet to the north
and 3S7 feet to the south. Fifty feet
further up the raise another drift to
the north of 1876 feet was driven, and
fifty feet still further up the raise a
drift of 1870 feet to the south and one
to the north of 361 feet were driven
The first drift to the south in the
lower tunnel level has raise through
to the second drift of 100 feet. In the
north drift on the main tunnel level
there are raises through to the 2OC
foot drift. About 80 feet of stopping
has been done on the 200 foot drift in
ore that will average better than $6C
to the ton.
There are numerous other small
drifts in other parts of the mine thai
show pay ore but have not been ex-
plored far enough to demonstrate the
full extent of the ore bodies.
Three hundred feet in to the nortf
on the main tunnel level station
has been cut in the foot wall of the
ledge IA feet high by 20 feet wide b!
80 feet long, in which is installed
Is horse power hoist used in sinking
a shaft from this level 207 feet on thu
dip of the vein The ledge was cross
cut from this shaft at the 100 foo
level and again at the 200 foot level