CLIFTON, ARIZONA, SEPTEMBER 7, 1899.
Vol. 1 ; No 21
REPORT Of COMMITTEE.
Analysis of the Waters that Run
from the Arizona Copper
August 30th, 1899.
Hon. H. C. Day, Chairman,
Board of Supervisors,
, Solomonville, Arizona.
Dear Sir: We, the Committee ap
pointed bv the Board of Supervisors to
inquire into the pollution of the S.in
Francisco River, have now io submit the
report made by Messrs. Mariner & Hos
kins, Analytical Chemists, Chicago, 111.,
which gives full analysis of the various
samples of water examined, and also
proves conclusively that nothing de'ri
menta! to the character of the water en
ters it from the works at Clifton.
The result reached by this eminent
firm of chemists, while proceeding on
purely scientific lines, confirm the views
which we had already derived from per
sonal examination of works, and also
from close observation of the highly pro
ductive gardens which are watered by
the wa'er flowing therefrom.
We are, yours respectfully,
Signed James Colq.uhoi;k.
Signed Andrkw Kimball.
Signed ' E. R. Stafford.
i from which we have drawn our concln
i It is evident, from a study of these re
sults, that the difficulty complained of
cannot have its origin in any of the ma
teiials introduced into the water by the
Arizona Copper Company. Tne fact that
all of these waters are alkaline clearly
excludes the possibility of the. trouble
being due to the presence of acid from
the works referred to, and the most deli
cate tests w"hich can be applied show a
complete absence of copper in solution.
Sample No. 2, however contains at the
rate of 100 grains per gallon of insoluble
sediment, of the following composition :
Silica - - - - 93.40 per cent.
Iron .... 2.80 " "
Lime - - - - .38 " "
Magnesia ... .21 " "
Sulphur ... .80 " "
Copper - - - - , .90 " "
Undetermined - - 1.51 " "
Ciucago, August 4th, 1S99.
Hon. H. C Day, Chairman,
Board of SujervisorB,
Dear Sir: As per communication from
Mr. James Colqnhoun, of Clifton, Ariz.,
we have made careful analysis of each of
the samples of water sent us, with a view
to determine whether the materials in
troduced into the river from the works of
the Arizona Copper Company so con
taminated the waters of the San Fran
cisco and Gila rivers as to render it in
jurious to the vegetation below this com
pany's works. We submit, on separate
sheet, analysis of the waters sent ns,
100.00 per cent.
The copper in this sediment, however,
is combined, no doubt, with sulphur, at
least largely, and in any event is in such
condition that it is insoluble in water
and is deposited with the sediment, and
therefore, cannot lrave anything to do
with the destruction of vegetation further
down the river, as it, no doubt, .settles
out long before it reaches the irrigation
canals. This sediment, we presume, is
made up of the tailings from the works.
It might be added that this small amount
of copppr in the residue,' in the condition
in which it is found, could not possibly
be detrimental to vegetation, even if it
were deposited upon the soil.
There is nothing unusual in the con
tents of samples No. 1, No. 2, or No. 3.
No. 4, however, shows the presence of a
large amount of chlorides and sulphates,
and there can be no doubt but that if
the water from No. 4 was used in any
considerable quantity the presence of
the excessive amounts of chlorides, par
ticularly chloride of sodium common
salt would be seriously detrimental to
The addition of chlorides to the water
of the San Francisco river, below Clifton,
as shown by analysis No. 2, his its ori
gin, no doubt, in springs similar to the
hot salt springsbelow Clifton.
It will be noted that the rise in the
amount of sulphates in the water below
Cliftjn, as compared with that above, is
very slight, and even in the analysis of
the hot salt springs water the amount of
sulphates is not excessive. In fact, the
small addition of sulphates, as shown by
analysis of the water tak n below Clif
ton, is probably due more to the springs
referred to than to any refuse from the
works of the coppT company at Clifton,
and, in fact, is such a relatively small
amount that it can have no special sig
nificance. We hope this will give you the infor
mation you desire in this matter, but will
be glad to add any further light we can
from the data at hand.
Very respectfully yours,
Signed Mariner & Hoskins.
No. 1. San Francisco River water,
above Clifton, May 26lh, 1899 : '
Silica - 2.86
Iron Oxide - - . - - - .41
Lime ------ 4.14
Magnesia ----- .70
Sulphuric Acid - - - - 1.51
Chlorine - - - - - 7 35
Carbonic Acid - - - - .52
No. 2. San Francisco River water,
taken from Detroit Copper Mining Co's.
dam, b!ow Clifton, May 25th, 1S99:
Silica ------ 2.62
Iron Oxide ----- .64-
Magnesia - - - - - 1.57
Soda ------ 18.39
Sulphuric Acid - 3.67
Chlorina - - - - - 24.93
Carbonic Acid - .52
No. 3 Gila River water, May 23rd,
Silica - 2.68
Iron Oxide - - - - - .23
Lime ------ 2.27
Magnesia ----- .64
Sulphuric Acid - - - - 3.15
xml | txt