New-York tribune., 1871-06-14

total of ,queu from cr2.on dam The distributing
reservoir inclusive will b. nearly nine million Of doOan-'
The Croton Aqueduct proper Ia In general good cohd-
ton and has delivered uninterrupted supply OF water
during the past year Very ttle work has been done In
the way of repairs and renewals Of or OF the STRUCTURES
connected with H. since 1t was finished III passes oVr
very rough aud broken country, and In many p'aces
crosaos deem raynes on high walls which arc protecte
by embankment slope, and retaining "ais' coino VI
these slope and retaining walls which have now been
bu more than thirty years, will require come materi
repars The bridges and cuverts also are IN Behera
good condition, but viii need some repairing
The new storage Reservoir at Boyds Corners formed
by buildne dam the west branch OF the Cro'o
River in the town Of Kent, Putnam County The di s
about sever hundred feet long, and high enough 10
be aer feet above the surface OF the stream anu
wil, aood about three hundred OF land inc ahu
for this reservoir acquired by the CrOtoh Aquo
Department which also decided to build oah Vi con-
crete masonry faced with stone, intending 10
TO this wall or dam for retaining three Thousand n,io
gallons NJ water under pressure OF sixty rect heau
bev so entered into contract with parties for the con-
s,ruotion NJ the same large part OF tho masonry
was competed before the organization OF the preSohs
| Depsrtment Tho original design also contempiaVeu
pang the floods the top of the dam near i's
end After careful examination OF the whole supec'
no ,h Denartment 1t was deemed unsafe TO trust TO TINS
on q, pasopry alone and it decided to build SUD
s,an,aI and yaertght earth bank on the inner side OF
this wall and TO cut canal through the solid rock at tho
nortbern end Of dam Of sufficient capacity 10 pass
the wafer OF floods the dam, and allow 10 now
| over a natural rock surface INTO tho i'oi NJ '' ~
The masonry as originally designed. is very nearly
comn,eted and large part OF the work OF excaYatihH
p Tor passing the floods been done, and the
work pertaining TO the construction OF tne ah M ~ %
commenced and will be prosecuted win az tnn ent
that can be brought TO bear upon put IL VIII & 10, W
possbe TO make this reservoir available Tor any part VI
' Some years since the Croton Aqueduct Department
S nars Of that section Of the island north Of Man,
haitian Valley would be by high service & hnu
pumping the water up from the Aqueduct INTO ~ Iney
determined to make two separate services for the major
part OF the highland they proposed TO supply the M
Tenth,ave aud line OF the Croton Aqueduct near
irdst ana Ior the hit ap
the site of the This reservoir and tank were
engine orated neur the end Of High Bridge, the
New-York side OF the Harlem River aud contracts were
s x6de nG Oy xors she When Ss
ized construction OF the reservoir was 80 lr @ a
The foundations of the tower laid and the shaft
| commenced The walls OF the enginehonse were up
son the reservoir was ready use but owing to the
serTce According to the original design, This pimpng
engine was to be supplied with water py tha III S iGh
This main Is about hundred feet long, and delivers
the water under head Of from twenty-five 10 thirty
revolution OF the engine water-hammer was produced
which equivalent to about thirty pounds 70 the @
square inch, and would inevitably have DESTROYED tne
pump and main. We had open TANK SIX ieet III dlaln
eer and thrytwo feet hgh made no OF % DGeT & Plees te,
tank, and supplied the pump from It, Ihe use Oh TINS
Late in the season 1t deemed advisable 10 put In an
auxiliary pumping engine OF sufficient power and ca,
for the present the entire supply OF the High Service
Reservoir. This engine was immediately erected ana
since that time has been In satisfactory operation Inc
contractor for the large pumping engine mas DO5d ls
Department that he will soon be ready to submit hls
completing the tower has been prosecuted as fast as
| artv IN
brought into use and the inhabitants OF Carmansyile
vicinity have been supplied with water from 1t since
Owing to an alteration the grade of the Fifth avenue
which has made since the two thirtysix inch main
pipes laid IN that street. 1t became necessary
during the past to depress them IN rockcntting
about four feet between Sxtyeghth and
streets The work had to be done at season OF the year
the wants of the city required that the mains should
he used to their full capacity for delivering necessary
supply OF water 1t determined to lower them with
the water n and continue Their use WINE tle operation
was going The trench In which they were laid was
widened the side toward the Central Park, to allow
the pipes to De moved aelay Des Ua % .G % Dos 81 e
resting on creased skids, and moved line at
with timber and plank while rock trench being
blasted out, to again receive them Iney were then
to their Original line and lowered, means Of jack
and care any thoughtless or careless act might
have produced very serious and expensive injury not
only to the consumers OF water but but would nave en- en-
dangered the lives and property on the low lands IN he
vicinity; The work was successfully peIIorned Without % "
any adjoining property l., A. H.. a,,,
|
Harlem Rivers are supplied with water BY means Of
pines laid fro the York shore to the islands the
Of he et oh aeS of
seventy feet OF water Randalps Island Is supplied D
one castr0n pipe six inches in diameter. Wards Island
is supplied by one lead pipe three ana Ges npe
| quarter inches in diameter BlaekweIs Island was,
R t and inches these
guta-percha pipes laid in very deep water Whlch
runs With rapid and constantly changing current Of
| he de over
caused much trouble by having holes worn In them Dy
edly taken up and repaired which is not only difficult
operation to perform, but very expensive one, during
TO BackwelPs Island has given out twice. Late last
Fall it was determined to try wrougatiron PIPE thrse
pipes which had failed. This successfully laid at
taken out repared and read This iron pipe has been
use some %sntas and considered by he
One Of the lead pipes under Harlem River became OBJ
last by having screen at the entrance
taken up the obstruction removed and the pipe re-
| working In very satisfactory mnaner.
During the construction ofdhe water works. the water
ae9rer % before they but retesed the
pipe yard Of the Department in the city before they
ing in the city has been discontinued and the proving
presses disposed Of The discontinuauce may account
mains and pipes OF late than former years. Feeling
the necessity OF rigid inspection M P Of all pipes laid we
test pipes Of al Sizes from four to oryeght inches in
diameter
BY an act Of Legislature the Department OF Public
Works directed the Crot0D AQueduct in the
city OF New York, between
and Nine streets, and TO supply its place by
of aqueduct below the grades OF the streets
or by means Of iron pipes IL was decided by this De
partment that the supply could safely be conveyed
through iron pipes than through an aqueduct OF ma
sonry, under head pressure OF water and also that
the supply would be much more secure II conveyed
through number OF pipes than II IL all conveyed
through pipe and experience has also shown that
pipes four feet in diameter best suited for
the conveys OF water In large cities The Depart
ment therefore concluded to lay sufficient
ber OF ourfoot pipes between these two points