Press and daily Dakotaian. (Yankton, Dakota Territory [S.D.]) 1880-1889, 1888-03-07
Was adopted, and discharginR into Mis-,
sissppI by other outlets.

siSbppi Dg UtnGr outlets.
b mans are ten, twelve, fifteen and
twenty inches in diameter. OF the
laterals, about So per cent, Blk inches in
diameter, ana the remainder eight inches
8 lev short apgti!A, which arc
ten inches. The mains for the most part
are laid With o igrade Of two inches IN
D hundred feet, which is the minimum.
In future nothing less than eight inch
pipe will be used in the branch or lateral
line. as all the Instructions which have
occurred in the branches in the past have
been In the six inch, and none in the
eight inch
The min!mnm grade of six inch. late
erals is six inches in n hundred feet,
At the upper end of each lateral is 10.
Gated one of Rogers Fields automatic
flush tanks, which discharges one hun.
dred end twelve gallons IN about forty
seconds. This tank discharges ita con-
tepts as often ss it is filed, but it is be.
iieved once in twenty fonr hours is sufi.
cient.
The system has man-holes distributed
on the mains.
No surface or roof water Ia permitted
to enter the sewers, the system being de.
signed and proportiened for house>sew.
erags only.
The house drains are Gil four inches in
diameter, and no trap is permitted on
the main drain, each fixture being pro-
vided with q separate trap. The soil
pipes are 81 cast iron, with lead jointe
above the ground and extend four in.
ches in diameter above the roof. Each
house drain is subsequently a ventIlator
for the public sewer.
For the purpose of removing the sub
soil water, agricultural drain tiles are
laid in the trench with each lateral, on
the grade OF the sewer, or below it, which
discharge, not iato the sewers, but into
the bayou. Additional lines of tile have
been laid in streets in which no sewer ia
located. 35 CLIO miles of snbsoil drains.
A large part of the trenohinR has been
done by contract, but the pipes have
been laia with hired labor.
The prices lsst paid for %excayetipe
and b~ack-flIing are as follows: Trench.
es W feet deep, 25o.; 81 to 8 feet. 3Oc.:
9 to II feet, 45c ; 70 TO l5 feet, 700 /, per
iineal foot.
The pipe laying, including laying
dsain tile in the same trench, also tbe
cost of the cement, sand, oakum and
$500 IA RoP0Ay % cntiLuh-Su III CUkg 4 OH
cents per foot. The flush tanss cost
complete about $4,000 each, including
$40 90 each, royalty.
The six-inch pipes, although draining
houses on both sides, III some cases for a
distance OF three thousand feet, have
never been oyercharged, and have
seldom been found running half full.
No trouble has been caused by sewer
gas. and the sewers are believed to bic
comparatively free from it.
Some OF the six-inch pipes have oc.
cssionally been obstructed by sticks,
zones, etc.. becoming fixed across the
tiameter OF the pipe, all OF which have
oeen promptly removed, at an average
cost OF $l3. so each.
Some deposits have been found in the
nsips. which have been rapidly
and ~inexpenslvely removed 0by the
passage OF hollow mental balls
through them. These balls are
about three inches lees in diameter
than the sewers, and being lighter than
water are pressed against the top of the
sewer, and are relied along by the fcrce
OF the current. The velocity Of the ball
IS less than that of the water, which in
passing it is o,ilected against the bot
tom and sides of the sewer SO as 70
Thoroughly cleanse 1T.
A portion of the mains have been
clesuHed t~wenty-three times since their
construction; the ~laterals not at all.
Pipe laying was commenced about
2osh of January, 1880, and on July Ist
OF that year about twenty miles had
been laid The first house connections
were made about March LIST OF the same
year.
Hourly observations in the twenty
inch main, on Both April last, showed
the greatest depth of flow. 1921 inches at
10 O. m least depth, 8 inches OF 2. o. m.
On 18th OF June greatest depth l4inches
at IL a. M. least depth, 104 inches at 4
a NJ.
Floats in the same sewer gave o I
TACO velocity of26-16 feet per second,
the depth being 124 inches.
The followipg is o statement OF the
connections made with thu system to
date, but does not include those made