The Portland daily press., 1895-04-02

street. WHICH lSSin part qnAso 'A','
allows covering ofahardls more tAan thiee
feet in places. At Preble streetd ne inter-
,eptor again CROSSES prlYate lahu' along
lines which have been asts talhea py the
city engineer as feasible and economical,
until it reaches behring's Oaks; here 1t con-
tinues along the most available lines
through the mark ground as far as Grove
street AID thence passes through Inc aims
House valley grounds 10 Forest street. Here
it reaches Portland street ana follows 1t
to beyond the railroad bridge.
1t is a question with me WAethef the low
area above this bridge can be draloea into
gravity interCeptor with an oui1ali az de-
scribed. It's upper end has been laid upon
a proposed new street as far up as douglass
street, but this requires the bling up OF Tue
low territory to suchsan extent that IL may
not be found practicable. In such case
the interceptor will have to be divided IN
to two branches. one continuing up Port
land street and the other following pro-
posed street between the railroad and the
low ground to Douglass street, where 1T
could be used to remeSs the sewage from
the high ground nor 6hpf the same by gray
ity The low ground laft between these two
branches will then besdrained into the pres
ent sewer of Portland street, and require
an eventual pumping of its sewage.
1t is impractica Bile with any etnclent5 slope
of the interceptor, TO receive tue sewage
from the present saweron 1t. John street.
The elevation of the crown of the sewer
at Congress and 81. John streets is l94s
feet and at the nteTeeptor it would have
to be about 1910 feet, instead OF 1906, its
present elevation. Therefore new sewer
of ten or twelve inches in diameter ought
to be built from Congress street to the in
tereeptor 10 carry only the sewage, letting
the storm water continue its course Though
the present sewer
In the low part of Portland street above
mel toned, wherever the sewer may not be
sufficiently deep to receive the sewage or
cellar drainage from the adjsining build
ings, these will have to be taken care OF as
at present and drained into the low level
sy stem.
On Greene street the interceptor will re-
ceiye the
BRANCH SEWER FROM DEERING.
A sewer on Washburn avenue and lis
probable extension eastward would inter
,cept the sewage north of the same, and de-
liver it into the Deensfg main sewer on
Forest Avenue. Vest ofpagson street. how
ever, the sewer can deIiparlinto the pro-
posed snaiI interceptoratt the intersection
of st John and Portland STREETS.
The main interceptor, as thus deseribed,i
will receive and deliver to the outtall by
gravity the sewage.of a population roughly
estimated at Loo in the future.
The territory which lies lower than this
interceptor, and for which the population
is estimated a. present to be about l49e per-
sons, must be treated separately bya low
level system of seweIs.l from which all the
sewage eventually requires pumping. IL
contains approximately one hundred and
ninety acres and Its boundaries may be
briefly described as follows: On the north.
Washburn avenue from st, John street to
Grove street and the continuation of the
line of Washburn avenue 10 and along the
county road 10 Green street, down Green
street to the Marginal Way and along the
latter TO the intersection ofEalmouth rect.
On the east the boundary is the line Of he
main interceptor through private lands and
Cove, Fox and Anderson streets to Lincoln
street. On the south the boundary is also
practically tie line of the EIain interceptor.
as previously described, OF. Lincoln street, ,
across private lands. through Deering's
Oaks and tie Aims House grounds and
valley to Portland street at Forest street.
thence the boundary is Portland street as
far as st. John street.
Where the interceptor is very shallow on
Lincoln street, between Boyd and Pearl
streets, it may be necessary 10 include the
buildings along Lincoln street, in the low
level district.
At suitable point pumping station will
have to be erected and the ordinary flow
lifted and delivered into the gravity inter.
ceptor, probably at the Intersection of An
dei soIl and : omerset street.
In this low district and upon those ad-
Joining streets where he cellars are now
flooded during rains or are affected BY tides
il would he of advantage TO adop The sepa-
rate system of sewerage, and receive only
the sewage and perhaps some of tbs suh-soil
water into he water-tight pipes, instead of
allowing it TO enter the present sewers.s
The eventual amount of pumping will be
materially reduced thereby and the Cove
receive lass pollution during times of
storms. The present savers. as built by
Mr.. Goodwin and others. could then serve
as storm water drains. diSehaFging into
Back Cove.
A separate system of sewage has been
bnilt in Deering- | would recommend its
west of behring's bridge az possible, both
for the territory that will eventually drain
into the gravity inierceptor as we'll rs for
that which will drain into the low level
district, as it reduces the pollution of the
Cove by the overflow after storms
The
DIMENSIONS OF THE INTEROEPTOR
lave been determined on the following as
symptoms:
The population of Portland residing on
the slope draining into Back Cove, is at
present about 20, 300, and it is estimated
that it will be $4,000 when..the area is built
up in the future.
The population of Deering which the pres
ent main sewer will serve. and which the
proposed inter ceptor should also sprovide
for is $4,000. OF this population about l4Oo
persons now reside on the area which can
not he severed directlysinto the interceptor
but from which the sewage will have to be
pumped and discharged intu it. probably
at Anderson street.
The quantity of sewage to he provided for
is usually taken to equal the water sup
piled to the community. This quantity was
estimated by Mr.. Shedd ct ten cubic feet
per person per day. While appearing to me
to be an ample allowance, il waste is re-
stricted, certain statements of the Water
company have led me to infer that a larger