The record-union., 1897-05-25
A PROPOSED SEWER PLAN
City Surveyor Mullenney Presents Il to
the Trustees.
1t Would Cost i'm the Neighborhood
of One Hundred and Twenty
Thousand Dollars.

Following is the report of City Sur
veyor Mullenney to the Board of Trus-
tees last night on a proposed recon-
struction and extension of the cltys
sewer system:
Sacramento, May 24, 1897.
To the Honorable Board of Trustees
Gentlemen: Herewith is submitted for
your consideration a sewer plan Tor the
city of Sacramento, embracing present
system and new sewers required, also
showing lateral or alley sewers, which
will be required as the increasing popu-
lation demands.
Herein is prepared an estimate COW
ering the cost of the sewers to be re-
constructed, new sewers required and
for flushing appliances for present lat
eral or alley sewers.
In the plan presented, ample fall is
provided for all new and reconstructed
sewers owing to the fact that the
present S-street sewer is placed at
low elevation to Seventeenth street, or
the point to where its construction has
been extended, and therefore for these
main sewers We are able to place at
a grade by laying them at wide inter-
walls and making large diameters that
will insure their perfect drainage or
flow free of obstruction, or, in other
words, they will be self-cleansing ow-
ing to the considerable volume collected
in each and to the advantageous
grades. Therefore we need only to in
sure a perfect drainage of the lateral
sewers to make the system work salts
factorily.
The average diameter of the alley
sewers is, with a few exceptions, eight
inches. They have to carry very little
storm water, and not sufficient sewage
to permit of clogging. They are the
size usually recommended for house
drainage Except with grades of sharp
incline) where direct connections are
made without the use of cesspools. 1t
is. therefore advisable that all cess
pools be abolished, and that direct con-
nectionS be made from houses for all
drainage, provided that proper traps
and strainers be used to avoid the OBJ
struction OF the connection pipes and
sewers. These accessories to pipe con-
nections can be regulated by ordinance,
and they should be made in such a
manner that they may be subject to in
spection at any time by the Sanitary
Inspector.
In order to cleanse out these lateral
sewers and also to dilute the sewage,
the plan provides for the construction
of automatic flush tanks, to be placed
at the head of each lateral, to be regu-
lated as may be required as to dis
charge of water Their expense is COM
paratively small, and their benefit is
unquestionably great. They are abso-
lutely required in all separate systems
and are much used in combined sys-
TENS It would be difficult TO name a
city Of importance which does not use
them. They are economical in the use
Of water and make its use effective by
discharging into a sewer in a volume
and thus removing stubborn obstacles
of resistance with little expense.
The plan presented contemplates the
drainage of the entire city, both storm
water and house drainage. For this
purpose it is proposed TO extend the s.
street sewer easterly with diminishing
diameter to Twenty ninth street. Then
looking to the present system, it is
proposed to reconstruct the Ninth
street sewer by laying eighteen-inch
pipe inside of the brick sewer from al
ley K and L, y to alley I and j; thence
by abandoning the present sewer from
alley I and j. north, and laying new
pipe at a lower grade so that alley sew
ers can be drained into the Ninth
street sewer, which at present is inn
possible north of G street, owing to the
fact that the sewer is too near the sur
face of the street.
The object of laying pipe in the brick
tunnel in Ninth street from K to j.
north TO I and ] is to confine the vol
ume to give velocity so that in dry
weather when the flow is light there
may be no deposits in the bottoms, the
grade being light through this portion
of the sewer.
The Thirteenth-stree sewer will re-
ouire to be constructed from r street
north, a enty-four-inch pipe already
having been laid from r to s. The por-
ton between L and \ streets, in Capt.
tol Park, viii be paid for by the Capito
Commissioners.
The new sewer in Thirteenth street
can be placed at a grade to give quick
drainage to the areas in its vicinity
and with a larger diameter will give
good satisfaction.
The main sewer in Twentieth stree
should be a twenty -four-inch pipe, di
minishing in diameter as il projects
north. At y street the N-street bricl
sewer may be turned into it, and the y
street sewer from Twentieth stree
west can carry the drainage from th'
Twentieth-street sewer north of L
the brick sewer in Seventeenth street
which is amply large to carry the add
tional volume of drainage
A twenty-four-inch diameter sewe,
should be placed in Twenty-fifth stree
north of s. and in Twenty ninth stree
from street north a twenty -two-incl
pipe should be placed.
South Of s street. between Thirty
first street and the high ridge on Twen
ty-first and Twenty streets. tn
surface drainage is south and west t
the Y-street canal at Nineteenth street
which outlet is reached by an opel
ditch along X street. 1t is proposed &
provide for the storm water accumulat
ing on the above described area by lay
ing a twenty-four-inch pipe in thi
ditch along Y street from Twenty thrt
TO Nineteenth. and continuing along y