The Goldfield news and weekly tribune. [volume] (Goldfield, Nev.) 1911-1947, 1919-06-07

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Culebra No. 1 .------~loss teet
Cuiebra No. 2 ..------. s4V feet
Eden No. s ..---~-----1Olo rect
Hidden Treasure ...---~-11ss Feet
Main tunnel. cleo. haulage $50 feet
So far. two commercial veins have
been developed, the Culebra, devel-
oped by Culebra tunnels Nos. 0, 1,
and 2, and the main tunnel and
Eden, developed by the Eden vein
was done through Eden Nos. i n
2 tunnels, but at shallow distances
from the surface. 1t is possible that
the Hidden Treasure vein may prove
a distinct vein from the Culebra, but
lit is so near the strike of the Guile
bra that it probably is only a con-
tinuation of that vein.
The Culebra vein strikes easterly
and westerly, and the Eden vein
northerly and southerly. Both veins
have steep dips and lend themselves
to the shrinkage method of stopping,
which is used. AS the ore is drawn
off it finds it's way to the Main
Tunnel level from both the Culebra
and Eden veins, and is trammed to
the mill by the electric haulage sys-
tenn.
The oxidized ores of both veins
are neal the surface, and drill n
break quite easily in blasting opera
tions, but the lower portions OF both
veins are hard and frozen to the
! walls. Drilling in this portion of
the veins, and in all the country
crossed in prospecting, is slow and
the ground difficult to break in
blasting.
Water Leyner drills of the latest
type are used in all drifts and cross
cut work, while Waugh hammer
drills are used in stopping. Com
pressed air is furnished by two 500
cubic foot compressors. All piping
for compressed air is in good con
dition.
Hand tramming prevails in the
upper tunnels, the ore going to the
main ore chutes and loading sta
lions on the Main Tunnel level, and
the waste to the surface dumps. The
electric locomotive easily handles 20
tons per trip. On it's trip into the
Main tunnel it hauls supplies.
Mine blacksmith shops equipped
with compressed air drill sharpeners
have been erected at the Eden No.
3 and Main Tunnels, as we'll as ma
chine repair benches.
AS stated previously. only two
commercial veins have been devel-
oped so far. The Comal, Nugget,
Adam and Philadelphia veins have
been prospected slightly and will re-
ceive further attention, as will other
surface showings.
After resuming milling operations
in November, 1918, the stope at the
south end of the Eden vein. on
Tunnel Level No. g., decreased in
value as the stope went up. Wines
below the level also disclosed low
values a few feet below this level.
The north end of the vein, however,
has improved in width and value as
stopping advances.
In milling some of the ore from
Culebra and Eden veins, results
showed the value too low for mill
ing under present conditions. In
consequence of this, as well as be-
cause of the abnormal costs of oper-
alton, some rock, which had been
previously included as ore, for the
present ceased to be commercially
profitable, the effect of which is to
reduce the previous estimate of ore
reserves.
Experience in stopping operations
on the Eden vein, indicates that
the vein may be spotted as to val
ues., and that it Will need more
than the usual amount of prospect
ing on it's dip, as we'll as more
prosecuting into the present walls.
The Culebra vein seems more uni
form, but the same policy as to pros
pecting will be adopted.
The principal pieces of develop
ment that will be undertaken dur
ing the year. are a continuation OF
winze No. 2 to the 100-foot point
below Eden No. 8 tunnel, and then
drift on the vein toward winze No.
1 for connection. At the same time
drifting will be continued on the
Eden vein on the Main Tunnel level.
and raising on the vein toward the
proposed intermediate level.
On the Culebra portion of the