Eureka daily sentinel. [volume] (Eureka, Nev.) 1871-1887, 1882-01-13
TUNNEL.
The superintendent's Report Of
Operations I'm This Property for
the Past FOur Years,

After nearly four years of constant work
upon the mines Of the company l am en-
abled to report to you as an established
fact that the ore deposits are now sufficient.
ly developed TO insure a future yield sufi-
cient to pay all the indebtedness of the
company within the present year and place
the Eureka Tunnel and Mining Company
among the class Of dividend-paying mines.
The main tunnel has been completed q
distance Of 1922 feet from the head Of
Goodwin Canyon into the heart OF Prospect
Mountain. and has by its course through
the formation proven the eastern slope Of
that mountain to be n Of the most valua-
BILE mineral bearing portions of Eureka
District. AT the point where the tunnel
enters the eastern slope of the mountain
there is an ore zone of mineralized lime,
known as the Eagle Zone" This body
of lime continues for 80 feet west OF start
ing point of the tunnel. Then the forma-
ton changes, and'a bed Of shale is found
extending from 80 feet to a point $50 feet
west of mouth of tunnel, making the shale
belt between Eagle" and Eureka Tun-
mel" ore zones, 300 feet in width. At the
point Of contact Of shale and limestone 80
feet from the starting point there is a seam
in the rock that carries some mineral. A
small spring Of pure water was here struck,
and by excavating a small receptical for
the water there has been a constant supply
furnished by the spring for the use Of all
those working in or around the claims.
After passing through the shale belt, the
tunnel entered a limestone formation that
was in places quite hard to work, making
the cost Of constructing the tunnel much
more thar had been estimated. This
limestone shows iron stains and ore every
few feet from where the tunnel penetrates
it to q point 1910 feet west of point Of en-
trance, making the mineralized zone $50
feet in width. 1t is in this ore zone that
the large ore bodies arc now being so sue
oessfully worked. Next there is found a
belt of shale 80 feet in width. This is
followed by another body of mineralized
limestone that is go feet wide.
To the west of this, at a point / 1910 feet
from point Of entrance, the tunnel enters
a solid body Of shale that is continuous
for $50 feet. They there is found hard
stratifed lime, into which the Tunnel has
been run 70 feet, making tho total length
1922 feet Of Tunnel. The face OF the
Tunnel is in very favorable looking forma-
ton, and less than 100 feet more will PEN
citrate the extensive ore zone which has
been partially developed by the Pioneer,
Silver Conner, Williams and Banner mines,
This Tunnel has been constructed in the
most workman-like manner, being straight
as q true line, large enough to work
through ad~vantageously. A good track,
well ironed, is laid throughout all the
works. so that cars can be easily taken to
all parts of the mine and its dumps.
Work has been stopped upon the header
in order to enable us to first develop the
ore bodies through which the Tunnel has
been run, the air being insufficient to en-
able us to work on the face and also in the
ore bodies a: the same time.
The following work has been done from
the Tunnel upon bodies OF ore in the great
ore zone. The points mentioned where
workings are situated are given az the dis
lance from where the Tunnel first enters
the mountain: At $40 feet drift No. l
north has been run 60 feet in mineral
bearing material, and has developed small
bodies OF good ore, the formation being
favorable for large deposits, the indica-
tons showing it to be near large caves.
When the mine ia sufficiently ventilated
this drift will be continued, and I have no
doubt Of soon discovering large bodies OF
most excellent ore.
Forty feet further west, at $50 feet, drift i
No. 2 N, was run on a scam of high grade
ore for 30 feet. This drift exposed a body
Of ore that ran nearly east Of q point 80
feet north Of the Tunnel, and 1t was fol-
lowed by a cross drift to north drift No. 1,
and q raise was made on the ore body
some IS feet, when bad air forced a sus-
pension Of the work at that point. At IS
feet north OF Tunnel, in drift No. 2 north,
the ore body WAS found strong to the east
and raising. An upraise has been run on
this ore for 80 feet, and the face of the
upraise now shows a well defined seam Of
ore, 90 inches wide, that assays S55 per
ton In gold and silver, over two-thirds in
value being gold. 1t is q soft ore,
carrying a high percentage in lead.
the Tunnel is most favorable for large
and valuable deposits Of high grade ore.
As ore was shown by the Tunnel at
many points in the great ore zone, I
started a drift south at point LOGO feet,
and ran II Is feet in ledge matter, showing
rich ore mixed with the lime. Next, at
point /, 100 feet, l started what is known as
the south drift, following a vein Of high
grade ore. being o pure quartz carrying q
large amount Of silver, 80 feet south. The
ore assays over 500 per ton. At point in
south drift As feet south OF Tunnel a
winze was sunk on the ore to q depth Of 81
feet below the level Of the Tunnel. The
ore shows strong all along the winze, and
at the bottom the deposit is larger than at
any other point, but want of air has forced
me to temporarily stop the WINE. Next
started q drift both north and south along
the ore body at q point 80 feet below south
drift. These drifts are now IS feet south
and IS feet north from Wine, being go
feet in length, and showing q breast OF
clean, solid ore that will assay on IN av-
erage over $3.50 per ton. Work is now be-
ing carried on in these drifts and in north
drift No. 2 and upraise. A drift has also
been run on a body OF ore that is of high
grade, from point / ,230 feet, a distance of
30 feet south. At point 1 $50, in the small
ore zone west Of narrow shale belt, /
sunk O shaft at north side OF tunnel
to a depth Of 80 feet. In this there wal
no body OF ore found, but the limestone
taken from the shaft carries over $40 per
ton In silver, proving this to be a highly
mineralized zone or ledge, n that bodies
OF ore are near the shaft.
All the drifts look well; the formation
Is as favorable as could be desired. The
openings now show several distinct bodies
OF ore
The foul air forced me to work but few
men for the last month. I have caused
galvanized iron pipe eight inches in diam
eter to be made for the main Tunnel.
This ia connected with a hot air furnace
which has been constructed at the mouth
of Tunnel, and will properly ventilate the
mine when the pipes are all laid. From
the main pipe there is a six-inch pipe lead
ing through south drift and down winze.
The other drifts will be supplied by pipes
four inches in diameter. Several men are
now employed in laying the pipe; so that
in one week the mine can again be worked
in ell parts of ii by a full force Of men.
At the mouth Of the Tunnel I
have caused to be constructed for
the company, the following improvements:
houses, q clearinghouse for the men. an