Deseret evening news. [volume] (Great Salt Lake City [Utah]) 1867-1920, 1909-12-18

in length from 500 to 1900 feet. and
in places so completely replace the
limestone that in early operations on
the vein, Il was supposed to be
flsSure In quartzite.
USE MASCoTT TUNNEL.
The Dalton & Lark group is develop
ed by the Mascot tunnel. the portal of
which is situated on the west side
of Salt Lake valley, driven in a west
erly direction $500 feet. where IL en-
counters the Lark osemite vein; from
this point II Is driven in a westerly
direction on the Lark vein 1900 feet,
and then turns in northerly direction
270 feet to the Lead mine vein, thence
in a westerly direction $50 feet on
the Lead mine vein. From this point
a cross cut has been driven In a
southwesterly direction for $50 feet.
where 1t encounters the Brooklyn vein.
Active development work is now in
progress on the Brooklyn. Lark
Yosemite and Lead mine veins.
The driving of the Mascott tun-
mol was big undertaking. but 1t must
he considered one OF the most COM
prehensive plans for draining and
operating. not only the properties of
the Bingham Mines company. but Al
large portion of the camp of Bing-
ham as well To the Ohio Copper
company's shaft. it Is now in dis
tance OF approximately three miles
and will undoubtedly be extended to
the Commercial mine. a distance of
4 900 feet beyond the Ohio shaft.
where Il should encounter the Com
mercial lode. approximately LOO feet
vertically below the present workings.
METAL PRODUCED.
While the Lark Y osemlte vein has
produced a large tonnage OF profitaDle
ore, 1t has u great future before H.
There is nearly $500 feet of the vein
vet to be developed, varying from 400
feet to 1S00 feet above the Mascotte
tunnel. The product of this vein has
been copper lead silver gold and cop
per-lead ores, usually occurring in sep
arate bodies, permitting of the ship
mcnt of each product separately. The
largest and most profitable product,
however. has been the -silver-gold
ores, and the same may be said of the
other two veins. While both the Lead
mine and the Brooklyn vein have pro-
duced a large tonnage of low grade
copper iron ore, the lead-silver ores
have been the more profitable. The
Lead mine vein lying to the north, has
been developed from the surface to the
Mascott tunnel. O. depth of 1,40O feet
on the plane of the vein. These de-
NclDDtntntS, nOWeNtTt dIe CoulIltu
largely to the center Of the property
and not more than one-half of the
vein has been developed on the strike.
At present there Is large tonnage of
low grade ore developed and this with
the ore of like character from other
parts of the Dalton g. Lark mines
will be concentrated In the Ohio Cop
per company's mill. located near the
portal OF the Mascott tunnel at Lark.
WORKING BELOW TUNNEL.
The development OF the Lark vein
below the Mascot tunnel Is in prog
rcss The heavy flow OF water en-
countered In the tunnel has been sue
cessfully fiumed, so that no difficulty
so far has been encountered In sink
ing and developing the vein below the
tunnel. The ore encountered at this
depth differs little from that mined
above, and carries about the same,
values. This applies to quantity as
well as quality.
Tho equipment consists of three $50
horsepower internal fired Scotch
Marine boilers and two 6ox1e return
tubular boilers, one cross compound
duplex Corless valve steam driven
compressor having q capacity OF 200
cubic feet of free air per minute; one
75 X w. steam driven direct cur
rent generator. used for furnishing
power for operating electric locomo-
tiyes in the Mascot tunnel. n COM
plete machine shop. blacksmith shop,
carpenter shop. Office, dwelling houses,
boarding houses. and store. Tho equip
ment is both complete and economical,
and is not surpassed by any mine In
the Binghem district
The DaltoS 81 Lark properties have
been producing steadily during tho
year and the product. silver-lead orc.
shipped to Murray and treated by the
A. S. & r. company.
YOSEMITE MINES.
The Yosemite Mines company is con-