New-York tribune., 1871-06-14

ne 70 connect with the system Of pipes below Canals
which will materially Improve the head in that part o
IRE VIII give direct and uninterrupted flow Of water
o IRON tbn che as ksseTy4 o to- to the part Of the city Some
ceived ~
In the upper part Of the city there Is l.uronoronae
amount OF small pipe and generally In blocks where
rock would be encountered I'm the excavation II was the
custom of the late Croton Aqueduct Department 10 omit
them, and consequently they enabled 10 law a
larger number OF nea feet OF pipe year than could
otherwise be done with the appropriations nor have
they thoroughly connected the ends Of the pipes so a. 10
form perfect circuit for the In consequence OF
made to this Department OF bad water. Witch we haye
In all cases. had corrected by drawing the stagnanf
water out Of the pipe complained Of. Many connections
have been made during the past 10 cOunteract this
evil and all ohese dead ends be
from bad water will The actual OF the city
pipes, as well as small ones Many OF these pipes win
have to be laid in streets that have been neglected
account OF the trenches for the pipes having To be
cavated through rock These causes will involve q
larger expenditure this season than In previous years
There II also deficiency Of proper sOpvalyes In the
early work Of aying this system OF pipe great variety
oil st0pvaves used, and many novelties were tried
moved, and replaced by stops made on weknown and
substantial plans but OF the worthless still
The region OF Harlem and Manhatanve is supplied
prncpallyrom pipe taken from the mains that cross
Manhattan valley and derive their supply entirely from
the aqueduct direct only pipe connecting that district
with the reservoirs Is welyeinch main passing along
the Third avenue, which Is their only dependence during
the time that the water B drawn from the aqueduct for
repairs. II during that period the pipe should be broken
Wards and RandaPs Islands would be left without
supply of water until the pipe could be repaired 1t is
the Intention to lay another main In that region during
We are now delivering eghtyhve million gallons of
water into the city every twenyfOur hours which IL
about eghty-6ye gallons to each inbabtant per day.
This IS much larger quantity per nhabitant than is
merous manufactures, which add To the prosperity OF
water for their necessary operations still great and
wanOn waste Is going on, which has been increasing at
a greater ratio within the past few years than during
IN
crease has DONE the wastage will soon amount to
more water than that necessarily used. -
some parts Of the Island, between Murray Hill and
Manbattanville too high level TO receive sup
NV OF water from either the Receiving or Distributing
Pservors IL ia proposed to remedy this by continuing
the tweny-inch main from the Hlgn issery
at the High Bridge Murray Hll and from this supply
all ~ the extreme high ground south OF Manhattan Val
lev This pense though great, Is aDsoiISy
tbe Island and in others will Obvate the use OF meehs-
ical appliances raising water TO the necessary gh'
on the organization Of this Department there were
many contracts existing for the construction OF ppe
sewers some OF which built Win pipes ony t~ee
inches in diameter AS the cost OF constructing sewer
is made up, not only OF the conduit ltselI Dut ao Va
cavatlng the trench repaving the street ana oIher
dental expenses which nearly the same Tor smd
sewer they for large one IL was aeenta 60
lent in all OF the subsequent contracts 10 maze , ma bss
sewers OF larger dimensions and the use O pipes mas
been dispensed with e1ceP, on ons 5oeeP np All the
sewers CALCULATED to be or eulncent capdcI " Cly
off the water fast IL would fall on the whole area
draining into the sewer II the rain fell at the rate Of one
inch per hour. This IL intended Tor tne Hhdu caPd
city OF the sewers, and in most cases they aigey eA
ceed II. - go, - - A.
IL was also found practicable to divide some OF the
basins of drainage aud not be compelled TO trust TO the
stability of one large sewer IN case OF great
where the territory could be more safely securely anu
cheapy drained by more than one outlet In the IN ne
c0ntracts wherever Is practicable the sewers Will ne
carried 10 the head OF the piers instead or empylng
them into the slips II the How Of the sewers Is emped
into the rivers the head OF the piers, the offensive mat
ter will DC carried away By the tides.
In the pavement OF streets the Department has had
no power TO decide on the kind OF pavement to be ad
In all where street has been paved the knd OF
pavement has been defined in the ordinance passed Dy
The Common Council directing the work 10 be done and
in many the ordinances authorizing pavement 70 DC
laid not only has the kind OF pavement been described
bu the specifications under which the work Is 10 DC done
Defined and all the power this Department has had was
to see that these special pavements were aid IN con
fOrmty with the specifications defined by the OfdI-
nance. ,.
Respectfully submitted ~ -
EDWARD ii. TRACY, Chief-Engineer