The Goldfield news and weekly tribune. [volume] (Goldfield, Nev.) 1911-1947, 1915-05-15
TO RESUME WORK
IN NO. z SHAFT
JUMBO EN-, is GETTING PREPA-
RATIONS COMPLETED FOR
NEW OPERATIONS

The Jumbo Extension Mining COM
pahy is rapidly getting preparations
completed for the Inauguration of
extensive operations at its No. or
old Original Velvet lease shaft, which
will be carried forward in addition to
the development work being prose
cuted by way of the Poleverda shaft.
1t is the plan of the management
OF the company to enlarge No 2 shaft
from two to three compartment size
and continue it down from it's pres
ent depth of approximately 400 feet,
to which it was sunk in the early
days or the camp, to connect with
the workings on the 1017-foOt and
other levels of the Poleverda shaft
and permit of the aggressive devel-
oprseEt of the northeastern section
of the company's territory When
completed, No. 2 shaft will not only
greatly improve the ventilation Of
the entire mine but will relieve in
large degree the heavy demands for
hcisting that are made at present on
the Poleverda shaft.
The 1O0-horsepower double-drum
hoist and motor, which arrived in
camp recently from the manufact
urers in Denver, are being installed
at No. 2 shaft. In order to make it
sit on level with the collar of the
shaft, it has been necessary for the
company to build a massive concrete
foundation for the hoist. The cleo
tric current has been connected with
the hoist motor and the equipment
will soon be ready for service. The
outfit purchased by the company for
usa in the new operations include
four jackhammer drills for sinking.
Actual work in the shaft will begin
about the first of next month, ac-
cording to Consulting Engineer j.
X. Turner. The shaft has already
been enlarged from two to three
compartment size to depth of 40
feet and the work Of enlarging will
be continued as rapidly as possible.
Air for the operation of the drills
will he conveyed from the compress
scr at the Poleverda shaft house to
No shaft, distance of 500 feet,
by a 4-inch pipe line which has al
ready been laid and is ready for ser
vice
In the Poleverda workings of the
mine, excellent progress is being
made in the raise recently started
from the south drift in the ledge in
the shale which for some distance
has been showing quartz of low
value The face of this drift has
reached the farthest point in the
southeastern section of the Jumbo
Extension territory at which the min
eral zone has been exposed. This
worKing was originally known as the
main east crosscut into the Velvet
claim but since it revealed the ledge
in the shale it has been turned
south and become a drift. The pur-
pose Of the raise is to reach the con
tact of the shale with the latte,
which dips to the east at very flat
angle Raise 5O3E above the same
drift is now p about 40 feet and is
oxocsing shale in the top.
On the 975-foot or shale d level,
a raise has also been started to ex-
pose the contact. Six feet of $40
ore is being broken down in the east
drift on the SOO-foot intermediate
level which is 55 feet above shale
4 level. On shale A level, which is
1S feet below the 921-foot level. a
crosscut is being extended south
west from the south drift to catch
the downward extension of the ore
body being mined on the SSO-foot in
termediate level. Further west on
the shale A level, south crosscut
is being advanced to catch the west
ern portion of the same ore body.
The east crOsscut on the 7OO-foot
level. which is nearing a point verti-
Continued on Page Eight)