The herald., 1897-04-20

sional heavy draft for fires.
The experience of nearly every water
| supply shows that the main draft, aside
from fire service is at times more than
double the average draft. Based upon
these facts, the mains have been de-
signed large enough to enable a tenn
porary draft equaling 81 per cent in
addition to the average 200 gallons to
be made upon them without overtaXing
I its capacity during times of the heaviest
demand. except in the pump level sys-
tenn where the limited supply of 4 1000 600
| gallons daily Gid not necessitate the en-
largement of the pipe system beyond
| the required capacity for this amount.
| The present pipe system of q and 4
inch mains illustrates daily its ineffi-
cheney and want of proper delivery when
drawn upon. and the absolute necessity
of larger mains and plenty of water.
| The present power plant in connection
| with the Buena VISTA street reservoir
| is provided with Pelton wheel which
| does duty now for pumping water. In
| the event of Incorporating part of the
present system into the proposed new
systens this particular feature is de-
| signed to furnish the power for generat-
! ing electricity for the purpose OF illu-
! minating the new central power station.
and also to furnish the power to operate
! automatically by electric motors the
gates and valves in the different gate
| houses, and also such large gates as are
distributed within the city limits in con-
nection with the system and are desig-
mated as emergency valves, which lat
ter are placed at certain convenient
places so as to make the different pipe
systems interchangeable and intercom-
municative with each other, thereby en-
abling the superintendent at the CEN
trail station to practically control the
entire system automatically from this
point.
The running expenses of this plant
would as in the case of the power plant
he reduced to the cost of attendants.
oils and renewals. The main feature
in the location and assembling of the
reservoirs, power plant direction and
alignment of the main trunk pipe lines
leading therefrom which has been striv-
en- to arrive at, is a concentration of
all the vital parts of this system into
one central station, from which place
out, the entire pipe system from the
headworks down TO the outskirts of the
city limits can be operated and syste-
matically controlled.
RESERVOIR SYSTEM
The series of reservoirs comprising
this system will consist of the present
Buena Vista street reservoir with
storage of IA 900 600 gallons; the present
new Bellevue reservoir with a stor-
age of al 900 900 gallons; the proposed
high level reservoir, with a storage of
II, 500 900 gallons, and the proposed pump
reservoir with 10000 gallons capacity.
making a total of rs 500, 900 gallons, equal
to one and one-half days maximum sup
ply for the estimated population of 241,-
''G All R'5519' 6i 'ss., reservoir. !. to b. pro-
in order to guard against the fouling Of
the water while stored, to guard against
undue loss by evaporation, and in order
to keep the temperature of the water as
low as possible during the heated sea-
son.
The reservoir capacity of a city water
supply system is of the utmost import
ance. the surety of being able a all times
to draw upon this storage during times
of large confiagrations. during renewals
and repairs to any Of the parts of the en-
tire system, determine to a great extent
the value of the latter and add to the
benefits to be derived therefrom. The
76, SOC, 900 gallons reservoir storage Is
however by far the smallest item which
is actually stored, as back of the reser-
voirs there is an entirely underground
reservoir, tapped by means of the head
works, and ready to be drawn upon al
any time.
Having in this case two sources of !
supply. with two main conduits leading |
to the reservoirs, a fear of a total inter
rupton for any length of time long |
enough to seriously interfere with the |
of the valuable fluid can rea-
be excluded.
It is somewhat difficult to effectually |
the reservoir capacity as
with that of other cities, since |
the natural requirements of different |
works vary greatly, and also the diff |
Guilty of obtaining a stored supply. Some /
small towns draw from large lakes and |
have several years supply by natural |
storage; others, with supplies pumped |
from abundant sources of natural sup !
ply and with duplicate pumps to insure !
against breakdowns, need and have but |
a very limited supply. Others, again. |
have need Of large storage supply from |
lack of these advantages.
In the plan presented to you the ad-
of having an unlimited sup |
ply of underground stored water. with
&c, 500, 900 gallons of water stored in res
ervoirs to draw upon in combination /
with the favorable location of the reser-
voirs and the depending pipe system con-
practically gravity system.
with the exception Of the small quantity
of 100000 gallons to be furnished by
the pumps. will naturally place the ci.y
Of Los Angeles within the rank of the |
favored few possessing efficient water
works.
PIPE SYSTEM
The city distribution pipe system con
sists of total of 497.49 miles of pipes
The smallest size main is six-inch pipe
IF which 1,6S5,173 feet, or 31916 miles,
are required. The largest main is 40
inch pipe, of which 1882 feet, or 147 miles
are needed.
For fire protection service there are
placed within the city limits d total
Of 24S7 hydrants, 562 of which are oe-
signed to have S-inch connections with
the pipe system, with two engine noz-
zes and 1875 TO have 6-inch connections
With one hydrant nozzle. There are a
present but $50 fire hydrants within the |
city limits In addition there Will be
about $50 sprinkling hydrants.
The pipe system is designed sufficient
iy large to furnish at all times a maxi |
,,ot,,,, rt,orfit,- of water for drp,actfc