The Salt Lake tribune. [volume] (Salt Lake City, Utah) 1890-current, 1911-10-21

points. II is necessary 10 place coal and
other supplies at each steam shovel level
and bring the equipment To the machine
shop a. more or less frequent intervals.
The ore body near the surface lies in
folds. so that in the removal of the cap
ping there are times when thousands OF
tons Of Gre are loaded as IT is uncovered
and projects out toward the steam shovel
lcYcl. These are some OF the important
features that went toward deciding on
railroad connections to the different
sicmn shovel levels II certainly makes
tho most flexible arrangement 10 he had.
Owing TO experience that had been had
with the steep grade heavy curvature
railroad. and our own experience dur,
ing the first operations, II was dccldeo
to build these permanent tracks on four
per cent compensated grades and SIX
teen degree maximum curves, with as
few OF the heavier curves as possible
These arc the tracks that are in course
Of construction now to. the upper levels
and located on the Carr fork side Of The
property.
Methods Are Compared.
the handling OF ore over the new lines
as compared with handling it over the
old lines. The new way we use the
small saddle tank, dinky locomotive with
n small crew all cheaper labor, This To-
comotive handles 80 tons Of ore a. ten
miles per hour over these grades The o'd
way was TO use Shay engines, standard
crew, all expensive labor, handling $50
tons al five miles per hour You can
draw your OWN conclusions. As ] have
explained before, The steam shovel
five feet high. These levels extend from
the main level al ~ at elevation 634o
In alphabetical order TO letter 90" Each
level Is connected into this system oil
railroads. SO that coal and other supplies
can be delivered to each steam shovel
level. and ore removed from these levels
whenyer encountered by the steam
shovelS.
There arc four ways Of breaking The rock
employed at the steam shovcls. by the
gopher method. keystone holes, Toe holes
and pot holes. Where there Is plenty OF
room u gopher hole is driven into the
face Of the level, forty or fifty feet: and
powder, Then a sufficient amount is put
in TO break the rock. This method breaks
the largest amount OF material The
keystones are used TO strip the ore and
also 90 break tho rock where the room
is limited. The toe holes arc driven along
the base OF the level. keeping IT In good
line and allowing the steam shovels TO
work closer TO the bench. The pot holes
arc for breaking loose rock off OF face
OF levels and aiding in the stripping OF
Tile
In addition To this. gangs OF men are
constantly employed breaking down the
loose rock that does not come freely.
This work saves a lot OF labor and eX-
pense, as sometimes a very small rock
keys UP thousands Of tons of rock above
IT, FE' black powder and 50 per cent
Monobe is used on this work. The pres
ent equipment used in steam shovel
opcrat lions at the Utah Copper mine is
as follows; Twenty-Five steam shovels.
IS locomotives i0S cars and arc moving
approximately three quarters OF million
Yards OF material q month.
The Bingham x Garfield railway. eN-
tending from the Bingham district 10
the mills and smclter at Garfield, was
first worked on during 1908. Construction
work started In April. 1910. and com
pleted In April, 1911. This railroad is a
pensated grades and eight degrees maxi
mum curves. with The exception of the
Dry fork crossing where two ten de-
gree curves are used, The power that is
used for the freight service Is the Mallet
type OF locomotive. which hauls forty
empty cars up the grade at twelve
miles per hour. These cars are all sixty
ton capacity making 2i0o tons Of ore
moved each trip.
Enormous Undertaking.
The characteristics or construction on
this line were the three large steel VIA
ducts crossing Carr fork, Markham and
| Dry fork. and 1900 feet of tunnels. There
was an enormous amount of work done
taken to complete This linc-t.1SQ 900
cubic yards of material was handled. l2.-
600 cubic yards Of concrete was placed,
1900 linca feet Of drain tunnel was built,
$500 lineal feet OF tunnel WAS driven.
Carr fork bridge. $50 feet long lS2 feet
high: Markham bridge. $40 feet long. 225
feet high. Dry fork bridge, $40 feet long.
| lSS feet high one mile OF this road cost
over a half a million dollars.
| Bingham Canyon now has better rail-
road facilities than any other mining
camp ] know Of This system OF roads
viii accommodate any probable future
! developments. and has ample capacity to
handle the tonnage OF tho camp. and can
assure ali Of the mines OF sure and cont
slant handling Of The product In the fu-
| turc,