The diamond drill. (Crystal Falls, Iron County, Mich.) 1887-1996, 1912-04-13
HAS ALL or THE LATEST IMPROVE
~ MEMS IN SHAFT CONSTRUCT TlON
WAS SUNK IN RECORD TIME
Work so Planned That Speed in Sinking
and Completing Was Attained Fine
Machinery Plant

The Bristol Mining company has
been engaged tor year in sinking and
eqUipping shaft TO give an outlet 10
the product of the mine. The work
was commenced last May and has been
carried on continuously since that
Niime. The work was done both by
sinking from the surfacs and raising
from the bottom and intermediate
levels of the mine
In order 10 start the raises from be-
low 10 was necessary to DRIFT about 800
feet into the walls and the rock from
these drifts and from the raises has
been handled without IN any way in
conveniencing the mining operations
or in lessening the output.
Supt. Biork has given tnis work his
Individual and constant attention and
the success attained in the sinking and
equipping of this new shaft is certain
ly monument 10 his ability AS mine
manager
The shaft is sunk on the north side
of the ore deposit, about 300 feet from
the ore and centrally located from
either end 50 that the tramming dis
tance is minimized 10 nicely. The
depth Of the shaft from collar 10 bot
tom is 1000 feet and the rock through
which IL was sunk il mostly black slate
with some jasper az intervals The
size Of the shaft is 22l ~ outside
measurement and contains 4 compart-
ments; two skip-ways, a cage.way and
a compartment for pipes, ladders, etc.
The shaft is lined with steel wall
plates aud - tamarack plank and pre-
sents an inside surface that is beauty
TO behold The dividers are of steel
also In fact the aim has been TO make
Iimshaft as fire rroof as possible.
Be shaft will be surmounted by a
steel shaft house OF the latest design.
The excavations are now being made
for the concrete piers upon which the
steel structure will stand The pocket
will be Of steel also. Owing to the
position OF Briar Hill creek il Will be
necessary 20 set the pocket TO one side
OF the shaft and the ore will be con.
veyed from the crusher TO the pocket
and also 10 the stock pile landing, by
two 36 inch conveyor belts. These
belts will be about 30 feet long ana
will be OF the latest make In the con-
veyor belt line.
Another new departure from wood
construction, now being figured upon
IS a steel coal trestie 20 serve the pro-
perty. The installation of this kind OF
a -trestlc is not definitely decided upon
but the chances are that such will be
the material used in its makeup.
In the machinery line. the equip
ment that is being installed is fully in
keeping with the shaft. A large boiler
house. 65 so will contain three bat
teries OF two boilers each. Two OF the
boilers are new and OF rs h. p. each.
The other four will be taken from the
present power plant
The boiler room is model in CON
struction being sunk about TEN feet be-
low the surface and the walls OF heavy
construction with concrete
hoor covering The entire space
the Bristol people met SOME bad
uck iiI the contraction OF this con
,rete. There Is a layer OF clay between
.he stratas OF hard pan The nortn
md OF the building seems TO have been
loo close TO the clay for II has settled
causing the wall 20 settle
md the aoor TO crack The entire
North section OF the building will be
iorn out the clay removed and the
vail put down 20 the sub.strata of
lard pan 80 ~ 10 insure the structure
rom any future settling. In the CON
Itruction Of the machinery foundation,
his clayJ,Sas removed 30 that the boil.
" room-and only the north section nf
hat ia affected by the shifting OF the
lay.
- new-ieature noted in the boiler
'h is "A welded header pipe. Three
ections. each ~ feet are provided 10
'tretch over the boilers
A mammoth self supporting smoke
tack. resting oa an immense concrete
her stands 20 the east OF the boiler
louse. The stack is 100 feet high and
= feet in diameter
Passing west from the boiler room !
on enter the engine house. a structure
4 X i04 with concrete foundation. I
his building. ss we'll ~ the boiler .