The Yakima herald. [volume] (North Yakima, W.T. [Wash.]) 1889-1914, 1911-06-28
PROCESS Of
PUR|F|CAT|0N
Pacific Power and Light Company
Orders Tanks for Calcium
Chloride Process
EFFICIENT TREATMENT
OF HARTFORD'S WATER
Polluted Connecticut River Made
Harmless by Use of Ordinary
Chloride of Lime and All Harm
full Bacteria Removed

The Pacific Power and Light COM
pany has ordered four r-hundred-
gallon tanks With which to purify the
city's water supply by the use of cal
cium chloriua. Two of these tanks
will be installed at the intake on the
WapatoX ditch and two at the intake
near the power house Just outside the
city limits 1t is expected that these
tanks with small motor driven
pump for each pair will be here with
in week or ten days when they will
be put in place and the publication
of the city's water supply will be
fact
Process of Treatment
1t is estimated that thirty pounds
of the chloride of lime will be used
every twenty-four hours. figuring the
consumption of water at $4000.000
gallons a day. The work of repairing
the pipe line at the old intake at
Kershaw's is progressing fast and be-
fore long it will be possible to turn
the water in at fun force from Wap-
atoX H. Il. kingman, local manager
of Pacific Power and Light company,
states that the only water let into thu
city mains comes now from the Wap-
atoX ditch, all other intakes being
a abandoned. The fall from WapatoX
intake to the city is 400 feet in the
twelve miles, giving a head that Is
g., ,I1 al, It,,n
When turned on recently at full
force, the poor work of the old com
pany in laying these pipes was dem
onstrated by the numerous leaks de-
veloped. the largest Being near the
old Kershaw intake.
The process of treating the water
with the calcium chlorte, which is
nothing more than the ordinary
chloride of lime, is to put the lime
into the tanks of water, the chloride
charged water being turned into the
city supply in constant stream. In
this way il is thorouhgly mixed at
the point Of intake at the WapatoX
and later at the intake at the power
house reservoir near the city The
use of this reservoir AT the present
time is caused by leaks in the pipe
line making it necessary to fill the
reservoir at night to supplement the
succeeding days supply This will
not be necessary when the pipes are
all Impaired and the full pressure is
allowed.
Efficient on Connecticut Rivers
-, III
ment, report on the use of this
method of purifying the water supply
of Hartford. Ct. with calcium chlor-
lite, is quoted from. Samples Of
water taken from the supply from a
half to a mile from its source Of inlet
were examined. and a long list OF
tests showed from $3.50 10 100 per
cent OF removal of harmful bacteria
On these analyses, the report says:
1T will h, seen by these results that
when one part per million or more of
available chloride was used, the re-
moval of bacteria was always more
than 99.5 per cent, and the colon
bacillus was not found in the treated
water"
Tho story of the experiments in
Hartford, as told by Ermon M. Peck.
an the Engineering Nnws, is in
part;
The object OF these experiments
was somewhat unusual Hartford $
water supply is by gravity from sur
face gathering grounds. The safe
ca pacity from the present works is
not far from 100000 gallons per
day, and at present the amount Of
water drawn from the reservoirs very
nearly equals that amount. During
the past two years, in spite OF the
fact that the rainfall has been very
little below the average the reservoirs
became depleted to such an extent
that the waterworks officials feared
a water famine For many years it
has been the custom in the cmer-
gency resulting from water famine
to supply a portion Of the city with
unpurifed Connecticut river water
Recently when the water in the
reservoirs began to get low and the
local board OF health heard that there
was danger Of resortiug to mis- much
polluted stream 1T promptly took ac-
ton condemning it's use and pre-
scented the board Of water commits
sioners with a memorial TO that Of
feet.
Since the river was practically the
only alternative aud the danger Of
famine was increasing daily the OK
periments We're conducted with
view to overcoming the objection Of
the health department and affording
TEN porary relief should it become
necessary. In this connection it may
be said that the results attained were
mi UGH better than the WaterWorks Of