The Minneapolis journal., 1906-08-05
BIG NEW PRODUCER "
PROMISED NEGAUNEE
Excellent Record in Shaft Sink
ing at the Rolling Mill
Property.
Special to The journal.


Ironwood, Mich, Aug. 4:-Consider
tion, an excellent record in shaft sink.
ing is being made at the rolling mill
property at Negaunee, Marquette range,
where a new mine is being opened by
the Jones & Laughlin company in con-
sequence of diamond drill discoveries.
The shaft is down 575 feet, and when
a depth Of 700 feet is reached. drifting
will be started. Three shifts Of eight
hours each are being worked, and the
sinking s. goes on without cessation: II
the ore is encountered in quantity, as
expected, the property will m a few
years become an important producer.
The drill borings gave excellent re,
turns. Lean ore, similar,tO, that mined
at the Cleveland Cliffs company's
South jackson property, has been passed
thru in the shaft. but these deposits
will not be mined, 5at least not at the
start. It is%the high grade, ore tapped
by the drills%that is wanted. i
8 The permanent ,hoisting shaft will be
in readiness in six weeks. The ma
5chinery was formerly in commission at
the east end portion of the company 8
Lake sAngeline mine at Ishpeming, the
ore from which, since the installation
Of an electrical haulage system, is now
being handled thru the main shaft.
a5 . ,Cavein Means Safety.
s. The management of the Cleveland
Cliffs mining interests are feeling elated
over a setting of the surface occur.
ring recently at the Negaunee mine. The
hanging at this property is Of the most
stubborn character. While the dip of
rooms were sgsssse, w worked out in the MANY
years that have elapsed since, operations
were first Begun: In the upper levels
there were many very large slopes from
which the ore was mined without re-
course to stick of timber, the back
being broken away from ladder tops at
a height that would make the average
miner extremely nervous were he not
especially educated in this particular
instance. r .'o...,.- y. T.. g, \ ~. ~
This method of mining was continued
in later years, and great depth was at
tanned before trouble came in the way
Of disastrous settling, Of the territory
: overhead. Lives were lost, as we'll as
ore, and. the property was closed for q
time to permit Of repairs. =.
The recent cave was just what was
desired, and it would have been still
better had it taken place sooner. On
ticularlyss stubborn. It was sought tc
weaken it by boring diamond drill
holes and agitating it by powder, but
this did not have the desired results
| and mining beneath has been prose
cuted IN careful manner by the Cleve
land Cliffs company. Recently there
| were indications that there was a weak
enlng Of the top, signs of which haC
| been carefully watched for. An under
ground inspection showed unmistake
able evidence that there was much pres
sure from above. and the men were al
ordered out.
The following morning, at an early
hour, the top went down, gradually ant
without noise. There is surface set
Element of about forty-fve feet, and i
is believed the movement is still pro
crossing. The cave means the safety
Of the men and the mine, and hence
forth the ore can be won more vigor
ously and economically. It looks as i
all the old rooms were well down.
Many Drills at Work.
Longyear & Hodge, firm Of diamont
drillers well known thruout the LAX,
Superior region, have about thirty drills
in commission on the Marquette ant
Menominee ranges and in the Michigan
copper country. In addition to this
they have many more in operation il
1.-The Minnesota iron fields, also thre,
churn drills at work in the Wisconsin
lead and zinc district, where in the pas
few months several millions of LAX
Superior money have been invested, t,
be followed by much more. The com
pany could operate large number O.
| 0l1