New-York tribune., 1873-07-22

Total. BIT So.77 SO.ss 1886 H.ea iS'sS
sT0 July 81, 0.81.
chief.Engineer Tracy also reports /:

ChiefEngineer Tracy also reports: -
OF the rain which falls, portion OF r1hs % rouDd
into he rivers and portion is absorbed Dy the gOu
OF that absorbed by the ground part Is
in springs and the remainder Is used up W bcH have
been made, IL has been shown that at least
Of the rain Which S S during sss the
ak years this Department has kept ram csateT
in the Croton Basin not far from Ricb s shows an
annual average fall OF over 90 inches, WI, whlcn en-
would give an amount OF water Is nenes IN or Se %
yearly supply. The OF land which drains INTO te
miles, which will give average daily supply OF water
from rain alone throughout the year, OF about OOOCO
evidently receive their supply outside Of
the watershed, no doubt much larger supply can Oe
relied on than this calculation shows. .
donai storage reservoirs, beside the second storage
reservoir az Breswers can he advantage0usy built AT
the OF many Of the tributaries Of the
CrOton River there natural lakes which In size
from 80 These lakes generally OF great
depth and their waters remarkably pure and impd
and supplied either from springs in the lakes from
springs near which but short distance through
riyuIets before entering them. These lakes, in the
aggregate 1900 OF land and three feet
drawn from this surface VIII give about 2OoVoOo GAL
During the year 1870 there were 100 days when the
natural flow OF the Croon River enough TO sup
py the necessities OF the city. During that time part
OF supply derived from the natural akes aDoV
from sx OF them In 1871 and 1872 owing TO the re-
quent and copous rains OF June, july august anu Vc
tober the natural flow OF Croton River, aided by the
available storage capacity Of CrOtOn Lake. furnished us
our needed supply without being had to the
natural lakes IC has been contemplated " ura"
from the natural lakes except la extreme cases.
LARGER AQUEDUCT REQUIRED.
Commissioner Van Mort then passes to the consldera
ton of the means OF connecting the distributing with
the storage and supply reservoirs He says that during
the next decade it win become necessary to increase the
size of the aqueduct and refers to that portion winch
has already been increased The work OF the alteration
Of the aqueduct from Ninetythird to Onehundreqand
thirteenth.st "a proceeding with yigor and VIII Dc @
eompeted by Jan l. 1874. The rock excavations nat
Leen completed and the 4Slnch pipes nave Deeh dlu ~
their posons and the sewers are finished Inc
realized from the sale OF the land occupied ny te vlu
aoueduct will be considerable, and Will De palu nV
Sinking Fund The capacity of these new pipes wiz W
double that old aqueduct, and VIII DC suclenI u
meet the requirements OF the city for 80 years 10 COME
The remainder OF the present aqueduct VIII, however
need 10 be enlarged one Dullt 10 accOmnouaIo
the increasing wants OF the city. NJ.
The LAYING OF the new 36Inch main pipe from FORTY
second dst Chambers-s has materially Increased lue
supply and head OF In the lower part OF the Guy
and when the other pipes now in course or
and In contemplation shall be laid, they VIII furnish an
the water required for the eXngushment Oh nes anu
for all other purposes. The 20lncn man, tehu
from the High Source reservoir at CarmaEsNlle, anu
suuplyinR tue more elevated portions OF tEe lsIinu
between Murray Hill and Manhattanyillc, VIII enaDe
te residents or that locality TO obtain supply Oh water
without difficulty Inconvenience such AS tuey "elc
| anlipcted A last Winter