Evening bulletin. [volume] (Honolulu [Oahu, Hawaii]) 1895-1912, 1910-07-01
NUUANU dam
IS READY
Confined from PAGE ~

NOohtAhutu lioH Tukt
from the Pail and passed onward to
the open ocean nearly taking persons
on their feet standing on the dams
top.
BY far better idea 81 the i'm
mense work can be gained by stand
ing on the lower side of the dam in.
front and looking upward to what
appears TO be fair.sized mountain
the top being nearly at the zenith
to one standing at the foot.
The dam itself covers an area of
eleven acres, that is there are eleven
acres OF ground beneath its founda
ton which is 40 feet thick. The
length of the top OF the dam is 1850
feet or a full half mile.
At the water line the width OF the
dam is 80 feet and with water at
this mark eighty acres of land will
be covered with SO0,OOO.OOO gallons OF
water.
In its construction 27O.0O0 cubic
yards of earth all was done and $4,000
cubic yards OF rock filling. There is
in the center 170.460 feet of rip.rap
and a large amount of lumber and
concrete were used in the dam. spill
way and tower, the total amount Of
concrete being 1000 cubic yards.
During the five years since the dam
Wa first started the work has wea.
thered many viclssitudes but has fin-
ally come out as triumph OF engi.
neering skill and perseverance. At
one time in freshct the water rose
behind the dam to within scant
distance OF the top at that time and
just a little more rain would have
taken the accumulated water over the
top and washed away the whole OF
the Ill on the lower side allowing
the wall to collapse. For some an
xious hours eyes watched the water
rise and deep breaths of relief were
drawn when high water mark was
touched and no further rise occurred
just short II the top.
To Prevent Overflow.
On the mountain side of the new
reservoir which will hold water for
Honolulu. Is a kpillway made of con.
crete which viii take all the waste
water I'm case of freshet. When
the water in the dam reaches a point
| thirteen and one.half feet below the
dam top. the amount which will be-
taken away through six openings of
the weir wall % the spillway will take
| If nl ntsneNnW nf tho
dam itself
In case all the openings are closed
and the water rises TO the top OF
the weir wall 100000 cubic feet a
second will flow down the spillway
and save the dam overlooking.
The material for the dam was
brought from the hills nearby by
means OF sluices and a railroad work.
ed by cable. There are over 100000
feet of lumber used in the construc
ton work Of the trestle to carry the
splice and where II crossed the spill
way II was elghty-four feet from the
ground SO great was the force Of
the wind on many occasions that the
whole trestle had to be anchored
down by wire cables. on several oc-
casions the steel sluice boxes being
torn up and blown several hundred
feet by the Pail wind.
One OF the most expensive adjuncts
TO the work was the raising OF water
10 do the sluicing. Two gasoline en-
gines raised the water from the re
servoir basin to height of 100 feet
and then two more engines and a
hydraulic monitor took 1t and washed
II into the fumes for sluicing mate
rails from the hills.
Nuuanu dam il finished and Homo
lulu will never want for water dur
ing any dry season again, II is pre-
dicted. When the dam Ia full, which
is expected to take several months
5000 900 gallons daily will be regular
ly used from II for this city