The Newberry herald and news. (Newberry, S.C.) 1884-1903, 1902-06-03

all danger from the gases hat may be
given off from these tanks; second, to
give the sewage as much time to disinto-
crate and become diluted a> possible; and
right here might say that there must be
q sufficient water supply thoroughly to
flush all sewers leading to these septic
tanks in order to make the dilutlon as
great as possible and to keep all pipes
| clear Of residue.
"The sizes of the sewers are then de-
termined by the volume Of the flush water
and sewage that is intended to pass
through them at given velocity. The
main sewer must have for its lowest point
the discharge into the septic tank, and
its highest point is usually the point most
distant from its discharging oint. All
sub or smaller lines must have for their
lowest point their discharge into the main
sewer; their highest point the polrt most
distant from their discharge The g ade
OI SlopC D>lNSSl an k'CitIl" Va N4A>N> NV
ers must be 50 that in no case will there
be point on any line Of sewer that will
be at a less elevation than point further
on in the direction of the flow, that is,
there must be no pockets or dips IN the
line of sewers and where siphonage must
be resorted to In some cases slphons
mnst be used in order to pass under
something that cannot be in itself chang
ed In such case a special construction
is resorted to in order to reduce the liza
bility of stoppage, and consequent de
post, to a minimum.
The grade or slope Of these sewers is
determined by the amount of sewerage,
the velocity of the flow and the size and
character Of the sewer; this grade being
usually d terlnined by the formula Kut
tersD after the size and grade of the
main sever has been determined
The sub lines and smaller pipes are then
designed with a view to carry the sewer
age from their respective areas by the
shortest and quickest manner possible TO
the main sub sewers and at the least e&
pense, care being taken to lay all pipe in
perfectly straight lines and OH grades
not to fall below an established mini
mum All changes of direction of flow
are designed to take place in man holes
In well constructed system a clear
light should be seen from one man hole
to another.
"In order to keep all lines we'll scour-
ed or flushed, flush tanks are placed at
the upper ends of all small lines These
flush tanks are so arranged that they
will fill up to a certain point within
given time; then automatically discharge
their contents into the sewer with a head
and velocity far exceeding the ordinary
head and velocity in the sewer.
''In places where sewer pipe must
cross drain, or any place where the
pipe is itself exposed and therefore rem
dered liable to breakage from outside
causes or at any point where the terra
Gotta pipe is not practicable then iron
pipe is used as a substitute
such is the system designed for the
municipality of Newberry by Mr., c. c.
Beddoes and using a septic tank system
of his own design for disposal; twelve
inch pipe for its mains, ten inch for its
sub mains, eight. six and -four inch for
its smaller pipe, using man holes about
every three hundred feet, and automatic
flush tanks f:'r flushing purposes.
The system is being constructed by
Messrs Guild & Co.. contracting engl-
neers of Chattanooga, Tenn, with John
H Randolph, of Batar. Rouge, La, as
superintendent over all and representa-
tive and G. c Mills in charge of con-
struction
LET it be we'll understood that the
above is not theoretical discussion on
the subject of sewerage design, but
simple statement couched in terms that
can be readily understood by any one."
The sewerage will be emptied into
SCOTS Creek at point just one mile be-
low the city, after the oxidizing process
has been finished.