The Hood River glacier. (Hood River, Or.) 1889-1933, 1905-12-07
FAVORABLE REPORT
ON GOLD RUN ORE

for the Gold Run Mining COMPANY
and makes very favorable report
de also advises the construction of a
undershot rather than an oversize
wheel which was the plan of r. II
Cox, president of the company. Mr.
Hall Lewis says in his report:
| have examined with great interes
the exhibits from the Gold Run Min
ing eompany's property which wer
lett at my office some days gao, an,
have carefully considered the seyera
questions concerning equipment 70
Development work, which were askeC
at that time.
l have come to the conclusion tina
with the present small supply of wa
ter at hand during the dry seasons O
the year, 1t would be much better fol
you to install an undershot. rather
than an overshot wheel for the follow
ing reasons. As | understand the
conditions hydraulic. you have a max.
imum fall of twenty feet, equal to tho
diameter of the wheel YOU propose tc
install, with doubtful supply of wa.
ter beyond ten inches in dry seasons.
This water discharged upon an over.
shot wheel of the type you propose
mlght be adequate for light work OF
present needs, but | would advise
that your works be so constructed
and the type OF wheel so altered as to
discharge the water in@o a tail flume
beneath wheel, preserving the twenty
leet of head" by confning water in
a stand pipe leading from flume above
to point OF discharge SO arranged
as to gain the most effective leverage
at the bottom of Wheel This arrange.
ment will render results much more
dependable than the overshot arrange
ment, as you can readily understand
when | remind you that water confin.
cd throughout the vertical fall eXerts
pressures in which to the weight of
the volume of water is added the in
huence of compact and continuous
How; and for the further reason that
IN an undershot wheel, the power is
directed and becomes effective at the
point of tangency of the wheel, or in
other words at right angles with the
vertical center of the wheel, whereas
upon an overshot wheel, there is a
loss OF volume and loss of leverage.
greatest at point of discharge, and
never as small as with the undershot,
throughout the quadrant of revolu-
tlon where the water over an overshot
wheel does its work.
In the matter of the samples of ore
which you left me, | feel disposed to
regard the richer samples as unfair
upon which to estimate an average
value, for the principal reason that
they are to my mind too rich to indi-
cate, in the form tion in which you
are working, the true character of the
vein. l was particularly interested,
however, in the large specimen of
about twenty pounds weight.
This rock bears what | consider ev-
cry indication of being from such
vein as they would term in California.
"strong slayer" " By this mean
hat the formation, distribution of
deposit throughout the mass,
and the uniformly m1talliferous ma.
5Cro thereof, all are pretty certain. |
might almost say infallible, indica-
ions of deep reaching deposit,
which, considering the heavy values
1f the small specimens taken from
ligher ley els where the distribution
If metal has been found to be less un-
form, prompts the conclusion that
your values are improving es you
ieepen your workings Basing calcu-
ations upon the basest metal ineredi- |
mt of the ore, the large specimen
lbove referred to presents a value of
i26. 60 lead, to which mu { be added |
uch gold, silver and copper values as
'ou are able to save in the process of
eduction adopted. The other two
maller samples present values upon
he same basis of S32 40, and S5l. 10,
he latter being probably characteris- |
lc of what you may expect to en-
counter at depths from 200 feet down.
N your pay chutes. 1t is my opin-
on, and has teen my practice in de-
elopinr prospects in regions where
he rosl4ts Of ore reduction have no
Ieen practically determined, that de
elopment work should proceed to a
'oint where, lided by faithful and
Conservative assay estimates you have
t hand sufficient ore on dump to JUS
ify mill test. A small plant for re-
uction hould then be installed, and
he values OF the 70 k taken out deter
mined. You will then be in a posi-
ion to safely estimate to what extent
GU can push yoGr development work
nd at the sane time make the prop
rty support itself. You must recog-
ize that the difference between a
that looks we'll" and
roperty that pays well'' is just the
Inference between prospect" and
''mine," and | strongly recommend
bat you secure a mill test, either
18th your own plant, or at custom
ill IL you are not able to install re-
uction apparatus at present, and
hereby gauge your further opera
ions. While | have not had the ad-
antage of personal inspection of
be property, | have seen enough to
g willing to say that were | in your
lace, should certainly feel justified,
y what you have in sight even now,
/ putting in small plant of say ten
ons capacity in 20 hours, aud feel
IRE that the property would demon
rate its self-supporting value.
| shall be pleased to accompany you
ut to the Gold Run at some future
me when my time will permit, and
o not hesitate to say that | believe
on have prospect which is greatly
boye the average of such propos'-
ons, and one which l feel sure will
| a short time become very salts
!ctory paying proposition, conserva-
vely managed
II. e. Cleland, night miller at thu
ascade Mill, who has also had a good
sal of experience in the mining bus
less has made a partial assay Of ore
ken from the mine at a depth of
wen and fourteen feet and says that
10 specimens are very rich producers
Id that if the mine develops this
nd of ore at a greater depth that it
i'll be fac paying enterprise.
M