The Portland daily press., 1885-03-04
CITY REPORTS.
Civil Engineers Report.

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Under the head Of street lines and grades, it
is stated that street lines for building purposes
have been given in 81 instances, and grades in
SO.
Under the head of surveys, plans, ETC., the
work done in that department is given in de
tail.
On the Eastern Promenade fifty elm trees
have been planted, in a row, on the curb line
Of the proposed westerly sidewalk, from Tur-
ner street northerly.
The names of the sewers built the past year,
with description and expense, respectively, are
given.
Bay have been faithfully cleaned and cared
for from April 25 to Nov. %, at an expense of
$297.
REoAPIrULATIoN OF EXPENSE.
New sewers. 22S. 81
Repairs Of old sewers, clearing and flush
ca4srs i've new rebuilt and reparsd 'sg54s 's9547s
Total se,SSdd55.255 20
Appropriation .s.................... so 10000
Excess of expenditures over appropria-
Con.,...-....... OBSERVATION-DISCLOSURES. 4lb.25
BACK BAY SEVER
BEFORE entering upon the details OF the proposed
intereepting sewer for the Back Bay district de-
sire state that the occasion of my appearance
before the City Council assembled in joint
tion 10 take action on the report Of the committee
on Back Bay nuisance. L asked to be present,
but had had no notice that would be called on 10
propose scheme of sewerage. 1t was known 10
some-I know not how long-members of The Coun-
Gill; that my plans of the sewerage systems Of the
city was laid down the route of interceptiDg
er through and below Kennebec street, and to no
of these members had ever obtrusivey gotfer-
ed this scheme or in any way plead for its superior
ity over any other.
While cOngersant with the method of the high
level sewer dischargDg by gravity alone at above
high water mark associated with the low level de-
lVered by combined gravity ard pumping had not
thought of that meth I'd necessarily applicable
the Back Bay SYSTEM nor shad L thought that for
many years to come it would apply to any of our
needs for improved sewerage, with which 60 always
to my mind the absolute necessities of many other
departments of municipal labor and responsibity
We are small and constantly growing city. and it
has seemed TO me that the dition OF a pumping
station to our municipal machinery should be
avoided for as long time as possible.
When [ was called before the above named con-
vention had been saved the folly of preparing
plans and estimates for a work which had been
entrusted to the sole consideration OF committee
constituted by the City Council, in which committee
had no place, and so had but brief account to
give of the scheme which had previously project
eo lurtner than 70 Describe the route OF the sewer
and to state that the sewage proper of a possible
population of 10000 that slope would amount
to less than 31a cubic feet per second, allow
ing to each person 75 gallons, or 10 cubic feet of
l remember saying that considerations of politi-
cal economy should come into this question, mean
ing and saying in part that the city should do that
which is best IN the case, everything else being
equal in other words thai, with full consideration
OF our financial ability nothing should be done for
sewerage which would leave other important inter-
ests unequal in the balance. The as proposed
was not unknown Or strange to any member OF the
Council, and by unanimous vote was adopted with
an order for the preparation of plans and estimates
for the work. 1t has since been objected outside Of
the Council that presented neither plan profile
nf fh0 RI f.f
enter into argument this point 1 could reply
that no plan or profile of any other route was laid
before the eonveation nor any estimate based on
thorough study of the route and that my as
above stated ought to be sufficient for my WITHHOLD
ing of the same.
Plans, general and special, of the proposed sewer
and profile of The route, together with estimated
cost Of the whole work. and for such part of it as
may properly be pos poned until the second year
of its prosecution. are herewith submitted.
The general description of the proposed location
is as follows: Beginning at and inlercepting the
Lnill pond sewer at pont 40 ieet distant west
erly from the bulkhead of the former tdemin foun-
dation; thence through the filed millpond and
across Green street to Kennebec street aud through
this street to the point Of departure of Somerset
street therefTom, distance of ,1l5.7 feet from
point of beginning; thence through the centre of
Somerset street ,S48.5 feet to the westerly line of
Mimot street, and through the newly laid out ex-
tension Of Fox street 1885 feet to point 76.5
feet westerly from the westerly line of Franklin
street; thence through the centre Of Fox street
9lS.15 feet to point in centre of Smith street pro-
duced; thence through the newly laid out street
over the fats FROM that point to the Marginal Way,
a distance of 2 ,6S3.5 feet thence across the Mar
ginal Way and over the fats 1925 feet to a point
10 feet distant westerly from the abutment of
Inkeys bridge; the, ce parallel with that abutment
feet farther the same line to the channel having
depth of feet at mean low water from which
teet giving total length of z ,542.7 feet.
The elevation of the water line of the sewer at
point of beginning being that of the Mill Pond
sewer is 4.l8 feet above mean low water, herein
after termed nj. IL. w. Here the dasiOnad
to be feet high and its crown will be at elevation
9.1S or about inch above mean high water IN. IL.
w at elevation 81. The water line outfall is to
be at low water mark, and the structural incins-
tion OF the bed will be in 1804.6 The sewer
feet high at outfall, will have Its crown submerged
at M. Ii. W. to the depth of 81 feet
The sewerage area of this slope of the city from
and including Green street TO IukeYs bridge 247
acres population of II, 900 thereon giving about
90 to the acre, using about 70 gallons or 10 cubic
feet of water per day would 100, 900 cubic feet
in day. If Que half of this be used in hours the
day must be figured at 16 hours and the quantity
will be 2OS cubic feet psr second, being 0.505 Gu
bic feet per acre per minute, and the whole dry
weather flow wall be 5.84 cubic feet per second.
1he Mill pond sewer brings volume of 2.o6 Gu
bic feet per second, dry weather flow as guaged at
IL O'Clock a. M. which may be taken its maxi
mum flow. A part of the tide and storm water
above this amount is designed to pour through an
overflow to the present outfall. proposed sewer
in the northerly creek hereinafter named would
eventually bring O.9 per cent. cubic feet per sec
ond, giving volume of 3.76 cubic feet per second
above Green street, The sewer must receive the
Wnoie now OIL Green street sewer being 6.2S cubic
feet per second at the end of hours rainfall ofA
inch per hour. This added to the above amount
gives 1904 cubic feet at Green street intersection
The crown OF the proposed sewer at Green street
Will be at elevation $40, 0.C5 above M. H. W., aud
an overflow it put Ia here would discharge only at
about high water.
The sewer from the mill pond sewer to Green
street l777 feet is designed to be of brick 2z5 ov-
al end area 8. IA feet from Green to Prebe street
brick - 4Hx5 ovifIrm. area 1928; the sewers
from bratIle, Paris and Hanover streets could
pass entirely over The proposed sewer and but lit
Tie more than their ory weather flow is designed to
De received amounting TO OPP cubic feet per sec
ond This Sc ction extends TO the end of the fill
Somerset street just vest of the Preble street
er, distance OF l55 feet The volume here to be
cared for, including the whole of the Green street
now, Will Do 1u.26 cubic ieet per second The sec
uon from this point through Somerset street to the
nlled land east of Pearl street 1853 feet TO be 81
4"Xo' rectangular, area 6.66, to be of two thick
nesses OF ihch panks laid to break joints and sup
ported by piles grded in the ofsthe section
of The Commercial street sewer under Long wharf.
The comb ned dry weather flow of the sewers of
this section is 063 cubic feet per second, and the
volume at the eud OF the secUol will bs 1888
CUBIC eet per sec0nd From this point to the end
of the tlled land ON Fox street east of Franklin
street 6Z2 feet, is designed circular brick sewer
of feet diameter having area OF 1868 feet. In
this section the first sewer encountered is that of
wilmot street which strikes the sewer
wholly received. Under the above