Lyon County times. [volume] (Silver City, Nev.) 1874-1907, 1894-06-02
DREDGE OPERATIONS.
Work Progressing Hapidly.-TheS Sys
tenn or Operation 90 be AnaWgurate'
by the New ManageMent.

by the New Management.
About the only scene of activity
hereabouts is the dredge plant,
where the operations of reconstruc-
tion are being carried on. Quite a
number of changes are being made
and when completed the material
will be handled about as follows:
When hoisted from the, river the
material will be dumped into a
14x14 foot hopper on the old scow,
on top of which is screen which
takes out all rocks larger than 8
inches in circumference. The mate
rial that passes through this hopper
then drops into shaking grizzly
that takes out all rocks larger than
Z inches in circumference. These
are conveyed TO the shore in
sluice, and the fine material con-
tinues OH into a revolving screen.
In this screen everything larger
than 4 of an inch is taken from the
pul p and carried to shore in con-
veyor. The material that is fine
enough to pass through this revolv-
ing grizzly is run into boot of an
elevator and hoisted into a sluice
36 feet long, in the bottom of which
quicksilver traps are arranged.
From this sluice the pulp passes on
to 3O-mesh screen-a large revolv-
ing cylinder 6 feet in diameter and
Is feet long The pulp that is fine
enough to pass through this screen
falls into a tank beneath the drum,
and from there into centrifugal
pump, which forces it ashore in a
pipe to double decked concentra-
ting plant.
This concentrating plant will
consist Of 23 concentrators-11 on
the lower deck and IL on the upper
so arranged that it can be moved
up or down the river bank as occa-
sion demands. This is calculated
to catch all sulphurets, as nearly
all the sulphurets of any value in
the river will pass through the 80
mesh screen and come to the con-
centrators.
The material that will not pass
through 30-mesh screen contains
the largest part of the free materi
al-gold, amalgam and quicksilver
This material is thrown out of the
end of the 80 mesh revolving screen,
into sluice, and conveyed to r.
mesh screen, where it is again
screened, and then passes into set
tier pa of the ordinary charac-
ter. From here but little of value
will escape. What is thrown out
from the l2-mesh screen, and what
overfiows from the pans will again
be treated before it is allowed to
return to the river
In the bottoms of the hopper and
the revolving grizzly tank, the ele-
vator boot and the 36-foot sluice,
as we'll as in other suitable places,
will be arranged quicksilver traps
which will be operated by pnen-
matte and water agitation to pre-
vent the packing of sand. On top
of the concentrators will also be
placed small amalgamators, or
plates, to catch whatever amalgam
and free material may reach them.
When the pulp is forced ashore it
will be dropped into centrifugal
pump which will force it up over
the center OF the concentration plant
where it will be distributed to the
different machines. The tallings
from the concentrators run to an
other centrifugal pump in the CEN
ter of the plant by which they are
forced to a sufficient height to give
fall enough to allow them to be
carried off.
Water power will be used to run
the concentration plant, and will be
furnished by three Pelton wheels
driven by a 80 inch stream from
the Douglass ditch
The cencentrators to be used will
be of home manufacture, designed
by DR.. O. H. Warren. General Man
ager in the east They have been
shown to be very efficient machines,
handling a large quantity of mate
rial and doing very close concen-
trating.
There is no necessity "f more
lexnerimentino: the annliances now