The herald., 1897-04-20

alone pipe system of approximately
325 miles. These water mains have been
designed of capacity sufficient to de-
liver, in addition to the quantities neces-
sary for domestic consumption. eight fire
streams at two simultaneous fires at
different points within this district.
+ AT 200 gallons per head per day. and
adding the required amount for fire ex-
tinguishment, it will require S5,755,00O
gallons to supply its wants, or about
b5.51S cubic feet per second. The differ
ence in elevation between reservoir and
district varies from so feet to 200 feet,
resulting in available pressure in the
mains of from 35 to so pounds per square
inch. This territory is that portion of
the city lying below the S25-foot contour
line.
The area between the contour lines
325 and 375 Is designated lin the distri-
button plan as the high level service eys-
tenn, and will be supplied by gravity
mains from a proposed new reservoir,
situated at an elevation of 4S0 feet imme-
diately above the Buena Vista street res
ervoir at Elysian park This pipe sys-
tenn embraces mainly the business Sec
tion of the city, from Seventh street
north, and is provided with water mains
of a capacity sufficient to furnish 15 fire
streams at two fires each within its
district. without diminishing the supply
for domestic consumption.
This district covers 1852 acres. with an
estimated population of 42,s persons,
necessitating for this district pipe
system of approximately "a miles of pipe.
AT 200 gallons per head, and adding re-
serve for fire extinguishment, this high
eraf
Ions during "a hours, or about 16. 80 cubic
feet per second. The difference in ele-
walton between reservoir and district
will give an approximate pressure of
from "a to AZ pounds per square inch
within the mains.
This district will, In addition to the
functions rendered by the fire hydrants,
essentially need the additional services
of the fire department for fire extinguish-
ment purposes. All mains are abundant
1y large to supply two engine streams
from each hydrant, and while the prop
er gravity flow will not in all cases suf-
flee to reach with sufficient force the
roofs of the highest buildings within
this district through a fire hose, still
there will be no Instance, either in this
or any of the districts, where water will
not find its way into any tank placed on
any of the highest of the present build
iHss.
That area of such portions of the city
above the S75-foot contour which can be
reached from it's reservoir is designated
as the pump service system, and will be
supplied by gravity mains from pro-
posed pump reservoir with an elevation
of 620 feet. This system practically en-
braces all of the elevated portions of the
northern part of the city and is served
by rs miles of distributing pipes, which
will cover, within this district, an area
of 1879 acres, with an estimated probable
of 29.400 inhabitants. The
area not reached by this system, on ac-
count of high altitude, embraces about
1924 acres mostly Elysian park. hills
adjoining the river parts of East Los
Angeles and Highland park.
The mains for the pump system are de-
signed of a capacity sufficient to furnish
water for eight fire streams TO one fire
in its district, in addition to the full
quantity of water required for domestic
consumption, aggregating 4,000,000 gal
Ions daily for this level, and approx
mately 1876 gallons per capita. The ques-
tion of pumping the water to the pump
reservoir for distribution by gravity
therefrom has been solved by means of
locating the proposed new high level res
ervoir at an elevation sufficiently high |
so as to obtain an available head of ap- |
4S feet between both.
The water supply brought from the /
upper headworks enters the upper reser-
voir. and after delivering a sufficient |
quantity therein for the requirements |
of the pipe system connecting Herewith, |
the remainder is designed to create the |
necessary power for pumping, through /
the agency of a turbine wheel, and then |
enters the low level reservoir for dis !
through this latter system. BY |
means of this arrangement advantage
has been taken of the favora BILE locations
between the headworks and the high
level and low level reservoirs.
The water in its flow from one part of
the reservoir system to the other not
only generates approximately $50 to 200
horsepower, available for pumping pur-
poses. but the system of aeration to
which the water in its passage from one
section to the other is subjected. to-
eether with the system Of filtration and
sedimentation at the upper headworks
previous to entering the pipe system,
necessarily improves the quality of the
potable water to a great extent and
at no additional expense.
PUMPING PLANTS
The power generated in this manner
by means of the turbine wheel is design
ed to operate duplex power force pump
CT capacity sufficient to elevate 4,000-
700 gallons of water per diem to the pump
This water power plant is al
ternated by a steam power plant con-
sisting of a battery of boilers and Cor
Ilss engine which will take the place
Of the turbine wheel in case of neces-
sity, breakdowns, repairs. etc; while
the entire combination of water and
steam power is again supplemented by
an independent steam actuated pumping
engine of 100000 gallons capacity.
Either of these power plants is of
sufficient capacity to supply the pump
service system; can alternate with each
other in doing this work; are designed
TO work co-jointly in case of accident
TO any of the reservoirs or main trunk
lines, or whenever any interruption in
any of the pipe systems would other
wise necessitate the total or partial in
of the water system.
Under ordinary circumstances the ex-
penses incurred from operating the pow
sr plant by means of the turbine wheel
would consist solely OF wages paid to
attendants, for lubricating oils and re-
newals to the wearing parts, brs sakages,
etc, while only in case of emergencies.
rI1ch as brea kaye or renewal f,f raear