Los Angeles daily herald., 1889-08-11

its construction Will D6 UTlck ahU O0LAS SAi0
The mean velocity Of the sewage, when
the sewage is flowing two-thirds full, ls
four feet per second, sufficient to Keep
the sewer free from deposit without,
however, injuring the brick-wo'k k. Inc
discharge, when two-thirds tull, VIII Dc
81 100000 gallons per twenty'four hours.
which will accommodate a population oil
more than 100000, at 100 gallons par
lead per day.
The excavation is all in dry earth, ex-
cepting three miles through the Cienega
Rancho which is in wet, firm clay.
Borings have failed to discover any
quicksand or treacherous ground on any
portion of the line. There are few short
spans crossing creeks where piling Will
be required. The sewer will follow the
surface OF the ground nearly the entire
distance over the Gun Club land, which
consists of firm clay well suited for
foundation purposes. There will be no
pumping required to drain the trenches
on any portion of the line. Suitable
brick material is found at convenient
points along the line between the ocean
and railroad, and the railroad offers con.
venient facilities for the delivery OF
materials along it's route.
The estimated cost of the sewer is
$40 900, which is calculated to include
such contingencies as the Gun Club pur-
chase.
The discharge end is located about
three miles from the Arcadia Hotel at
Santa Monica. 1t is intended to extend
this end about 600 feet into the ocean,
and should it be- found desirable to do so
it can be extended even further when
required.
1t is intended to remove from the
sewage all insoluble matter in suspen-
sion, which will not pass quarter or an
eighth of an inch mesh stralner before it
enters the sea.
This matter will be compressed and,
when dry, burned in the same manner
as is being done in Boston. The fine
particles Of solid matter will never be
observed after entering the ocean, much
less cause nuisance, even IN the Vlcln-
ity near where the discharge takes place.
The shore line is free from any OF the OBJ
jectionable features that exist at Long
Beach. There are no shoals or quiescent
places for the sewage to creep around
into and decompose. Every particle OF
water along the shore line is in constant
motion, and thoroughly charged with
air. 1t has been demonstrated that the
foulest sewage can be rendered per-
fectly clear by simple aeraticn, and
there can be no better agent to perform
this than the unceasing movement OF the
surf which, at every tumble. envelopes
each atom of water with fresh supply
of air.
At Long Beach the shore line is broken
into by number of sloughs, extending
in some cases back a distance of more
than a mile, into which the tide GIBBS
and flows. During the flood tide sewage
will,enter these sloughs and deposit on
the shoals where the returning current
never reaches. This shoal land is sat
urated with water, as, before it has TINA
to drain, another food tide occurs. 1t is
thus in the very worst condition for re-
ceiving sewage, and it will be remem-
bered that this sewage is at every flood
tide increasing in depth and becoming
more of dangerous nuisance. The idea
has been conveyed by implication that
the Ballona route is not suitable for lrri-
cation, that there are no lands along the
route suitable for the purpose, and that
the intention is to discharge all the sew
age the year round into the ocean.
This is contrary to TACT. The intention
is to utilize all the sewage at all times
except during rain, when the lands are
charged with as much water as they can
hold. There are over 1000 acres OF land
along the Ballona route, in addition to
the lands at present being irrigated, and
this will be ample to utilize the sewage
for several years.
There are lands on the Centinela
Rancho we'll suited for irrigation, but
their elevation is above the grade line
that gravity sewer would be obliged to
take in passing through them. They
can be reached, however, by extending
an iron pipe from the southwest corner
of the city, a distance of about five miles.
Tunneling can be avoided in this man
ner, and at the same time the requisite
hydraulic grade retained in the pipe to
insure q self cleansing velocity. The
cost of pipe to deliver the entire present
sewage output OF the city would be about
$50 600. The land referred to Is about
sufficient to utilize this quantity. The
present irrigation arrangements will not
be interfered with in any way.
If it should be found desirable to take
q large portion of the sewage to the
Laguna Rancho, it can be accomplished
by tapping the central interceptor at
Alameda street from which large guam
tity of sewage can be flowed to the sur
face before leaving the city. If the
properties adjoining the outfall want
sewage there is nothing to prevent their
taking it out, as the grade is ample to
get water to the surface at all points
where the land has been classed as suit
able.
In point of economy, the proposition to
make the outfal sewer serve the double
purpose of both distributor ard collector,
is not g good one.
To run the sewer to Long Beach merely
for the purpose of making it available to
lands in the vicinity of Nadeau vineyard,
is much like paying fare from Los An
geles to San Pedro, by way of Santa
Barbara.
The city can build the outfall to Ballona
and build pipe line to the Nadeau vine
yard for $250,000 less than to build to
the sea by way of this vineyard.
The lands that can be supplied from
the Ballona outfall sewer are ample to
utilize all the sewage the city will pro-
duce, when using the entire river for do
mestic use, and an estimate oi4the cost
for conveying the sewage to them from
the outfall route is less than 100000. If
the authorization of the proposed debt
depends upon delivering the sewage to
land owners on the Centinela or in the
vicinity of Nadeau vineyard, itlwould be
$50 900 cheaper for the city to build the
n al