Amador ledger., 1902-05-23
A Great Year For The Gwin.
From Pacific Coast Miper.l


Another annual statement of the con
dition and operations of the Gwin mine
in Calaveras county, Cal, has followed
the annual meeting of the Gwin Mine
Development Company. in San Fran
cisco few days ago. There were un
changes in the directorate. The re-
ports are for the fiscal year 10 April /,
1902.
The reports of General Manager f.
f. Thomas and Secretary Crawford
make very iattering showing, not
only in behalf of the interests OF the
stock holders. but in behalf of the
mother lode as field for mining cap.
ital and enterprise. This long aband.
oned old mine, now .reopened at depth
and splendidly equipped, grows in
greatness each year and steadily in
creases the strength of its demonstra.
tiOn of what the mother lode offers to
TIM mining world.
Dnring the year the shaft was sunk
l63 feet, giving depth of 1S43 feet to
the bottom of the sump and a vertical
depth of 1910 feet There were run
1852 feet of drifts, 2990 feet of cross
cuts and 243 feet of raises, making a
total of 5,09S feet of development work.
A cross-cut of 275 feet east from the
1850 station to the main fissure showed
the vein to be here from two to ten feet
wide and the ore to be of better quality
than the average above.
Phere we're mined 107, i12 tons of ore
aud tols93 tens were nilled, as COM
pared with g9,2l1 Tons milled in the
pre- i0us year. OF this amount 6S, 662
ions came from the 1900 level and 25,-
96i t0us from the 1000 level. The ore
lailied yielded a total of SAB, 500. 20,
giginE a rage of 81 1872 per ton re-
covered he free gold recovered
smounted to 1921, ,5l0.S7, an average oi
81 $50 per lon, and the sulphurets
yieia sos return of 1872, 1SS 33, an
ayeta LBS per ton. The total
average gold content of the ore milled
is placed at $4.724, including 1888 a.
the average assay value of the taiings.
The total quantity of ore worked to
April l, 1902, is 37S, 500 tons, the total
gold product $1,565, l274 and the
average yield per ton has san ST. 1876.
During the year mining aud trans.
porting ore to mill will cos S2.2854 per
ton, as compared with 50 1855 in the
previous year. Milling and concen-
trating cost S.4S04 against S. 44O6 in the
former year, making total of S2.665s
for mining and milling as compared
with 81. 1851. The 80 stamps crushed
an average of 294. 10 tons, or 3.677 tons
per stamp per "a hours. 1t was only
during the last three months of the
fiscal year that the mining facilities
were adequate to supply ore for the full
capacity OF the mill, otherwise the
average duty per stamp would have
been greater. There was $13, S3S. 81
spent on improvements to the plant.
Iimbers are now unloaded from wagons
by derricks operated by hydraulic
power. The mine yielded an average
of $50, 900 gallons of water per day.
The existing reserves in the mine
above the 100 level on April l, 1902,
were estimated by c. E. Downs, the
company's engineer, at go, 600 tons,
an increase of $40, 600 tons. On these
reserves 100, 600 tons are in the vicinity
of the south shaft, 22O, 900 tons in the
slopes of the 1900 level and 260, 900 in
the 100 level and Slopes. The month
ly dividends paid during the year
amounted to S125, 600, or l24 per cent
of the par value of the company's
stock. Tho total dividends to date
amount to 1881 500.
The current year will be marked by
extensive improvements and an en-
largement of the scale of operations.
1t has been decided to add twenty
stamps to the S0-stamp mill at once.
A large steel gallows frame 100 feet
high, the first on the mother lode, and
new and powerful hoist will be erect
ed. AS soon as enough compressed air
can be made available diamond drills
will be used for exploration. The fur
ther development of the mine at depth
will actively proceed. Shaft sinking
will go on below the 1700-foot level,
and it is planned to do this without in
terfering with mining operations. To
this end the shaft has been enlarged
below that level from Skis to 8xI6 feet.
The enlargement has been made in the
ladderway and pumping compartment,
which will be used as an auxiliary
hosting compartment from the 100
level with the aid of hosting machin-
cry on that level.
''The stockholders of the mine are
to be congratulated writes general
manager Thomas, con the general ap-
pearance of the mine, the prospects of
the 100 or lowest level, the flattering
indications for ore at great depth and
the large ore reserves in the mine"
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