The Pacific commercial advertiser. [volume] (Honolulu, Hawaiian Islands) 1885-1921, 1909-12-01

plant and its operation would entail
the expense of many thousands of dol
lars and unless operated under the very
best care and control would fail to
carry out the purposes for which it is
constructed. Filtration is a success to
the limit of the care and attention
given the filter beds and would require
the constant employment of a force of
skilled laborers, chemists and other at
PENDANTS. Failure to give this fltra-
ton plant proper care and attention
would result in a condition of the eff
fluent equal to if not worse than the
raw waters.
"Nuuanu Valley Is the main line of
travel lying between the Koolau dis
trict and Honolulu and is also one of
the points of interest on this Island.
The road passes through the water
shed and all washings and drainage
from the roadway flow directly into
the reservoirs, which is an element of
danger of communicating the water
with the germs of water borne diseases
such as typhoid and enteric fever, be-
sides fouling it with street washings.
"Nuuanu Reservoir No. is at an
elevation of 1923 above sea level and
is connected with what is known as
Reservoir No. l or the Distributing
Reservoir at an elevation of $50 feet
with 30-inch steel pipe, Gall eleva-
! tions being referred to sea leveN. I'm
der ordinary conditions of rainfall and
proper conservation of run-off. the sup
ply of Nuuanu Valley can be depended
| on to the extent of seven million eight
| hundred thousand 7,S00,000) gallons
! per day. Careful analyses of rainfall
! conditions and run-off of the Nuuanu
watershed have been made by several
eminent engineers and all agree on the
| above estimate, as to the extent to
which the watershed can be drawn
on. for a supply, provided means of
| conserving the run-off are constructed.
:" Assuming seven million eight hun
] dred thousand (7,S00, 000) gallons per
day as the available mount from Res
ervoir No. 4, this ant of water. I'M
der the available ,ad. allowing for
loss of head due : friction in the IL
600 feet of 30-inch pipe, would develop
I at the powerhouse at Reservoir No. /.
one thousand six hundred horsepower
! theoretical for a period of eight hours
per day or 1900 horsepower net to the
generator shaft at the powerhouse.
! "The present system of steam pumps
1 supply 100000 gallons of water pei
twentyfour hours. utilizing only 400
indicated horsepower. BY applying the
electric power generated to direct con.
neeted pumps. in addition to the pres
emf system of pumps, the artesian water
supply of Honolulu would be increased
from 100000 gallons per day to 90
| 100000 gallons per day.
"The construction of this electrical
pumping system wonld cost less than
the installation of a filtration plant fol
fi!teriug the seven million eight hun
dred thousand (7,SO0.0OO) gallons PEI
day supplied from Nuuanu Valley, and
assuming the costs of filtration at SIC
per million gallons-Mr. Herring stat
ing $50 in his report-this supply could
be pumped and delivered by electrical
driven pumps to the present reservoir,
or directly into the mains for consider
ably less per million. Such a system
would absolutely relieve Honolulu
from any danger of epidemics through
water borne diseases and would give tr
this city supply of water which would
| be pure and wholesome and beyond crit