The Jersey City news. (Jersey City [N.J.]) 1889-1906, 1893-09-02

readily determined by experiment; and while
the increase. if any, in the height of the
pipe herein suggested is too trifiing to
introduce any danger from increased pres
sure, we would recommend, before making
any addition to it. a thorough examination
(which we were not required and did not have
time to make) of the stand pipe. 1t is
obvious that its condition does not affect the
question of laying or not the new main. and
should be NOW in either case. As you are
aware, of the two ~six-foot stand pipes in the
tower one has not been used for years. the
bottom being goae. The foundations of
both stand pipes are SO imbedded as not
to be readily examined.
4. BY making low delivery connections
from the mains to the Summit avenue reser-
voirs, thus securing much greater head when
the reservoirs are low. Bearing in mind the
fact that these connections can be lowered in
the thirty-six-inch mains, say about twenty
feet in Reservoir No. 2 and about thirty-hve
feet in Reservoir No. 3, the great difference
in the d~ischarging capacityof the mains when
the reservoirs are low, under the proposed
altered conditions, even if there was ne
increase of head at Belleville, becomes ap-
parent.
Of the increased delivery that may be OBJ
tanned through the adoption of the above
recommendations SEINE idea may be given by
stating that, assuming a total gain of only
ten feet in head, the combined discharge OF
the three mains we calculate in round mum
lion gallons in twenty-fcur hours, or twenty
six and a half million gallons leaving the
twenty-inoh main entirely out. 1t has been
shown that the average gain in head will be
much greater than ten. feet. Minor remedies,
as the blowing off of sediment accumulated
in the low levels on the meadows, steppage
of leaks, etc., are too evident to require
special mention.
Under the given Instructions we conclude
and report therefore:
That the present capacity of the mains is
insufficient to provide safely for the given
consumption, and that it would be unwise'to
Prolong the present state ofithings.
That the measures above recommended,
all Of which can be readily carried out at
comparatively small cost, within the shortest
possible time remedy the pressing needs of
the city by increasing the capacity of the
existing mains SO as to leave for several
years more a safe margin between supply and
consumption.
That the laying of the additional main
can and should be deferred until the final
SCulIC VI supply 10 VIC Ali Ix1AA .
reasonable period of time, say three or four
years.
Under your written and verbal instructions
we were not to enter into details and could
have had no time to prepare them, having been
requested to hand this report in today if
possible for the meeting of your Board. We
have therefore ~purposely omitted even those
details we have worked out, but will at
time cheerfully give your Board any neces-
sary explanations or develop any of the points
of this report. q
Respectfully submitted,
I. NJ. DE VARoNA, I
RoBT. VAN buren,. :
MEssRs. ROBERT VAN BUREN, Brooklyn
Chief Engineer, and Waterworks
I. NJ. DE VARoNA, Asst. Eng, Brooklyn.
NEW YORK, July 2S. 1898.
Gentlemen Board of Finance of
Jersey City desire to make an investigation,
which will be more specifically detailed here
after, assuming the following premises:
The water supply of Jersey City is con
veyed from the receiving reservoir at Belle
vile to the distributing reservoirs at Summit
avenue through one 36-inch cast-iron main,
one 36-inch cement pipe with w~reught-iron
core, and one 20-inch c~ast-iron main. The
ldllGI Is SldlCQ W NC IL PS0l COIt0itlOa dlG
the two 36-inch mains are in good condi-
ton.
The average daily consumption can be
safely taken as %, 900, 900 gallons in twenty
four hours, and the maximum consumption
on any one day as 25, 900, 900 gallons. The
yearly increase in consumption may be taken
as four per cent, or say 600, 900 gallons
daily.
The pumping capacity is as follows:
! { Cornish pump......... gallons
! ......... S,0o0, 900
| 2 Worthington ....... 16, 600, 900
1Otal. .ol, ooo,oSV
The Cornish engines are connected with
the stand pipes, having a high water line
elevation a little over 161 feet.
Elevation of high water at Belleville
aoout.. Ao'
Bottom of the reservoir at Belleville
about. 49,
High water at Jersey City reservoirs
about. 12t
Bottom OF Jersey City reservoirs about. Ion
Centre of both 56-inch pipes at reser-
voir No. 2 about. 12t
Centre of 20-inch pipe at reservoir No.
. ABOUT. 14'
Top OF 36-inch stand pipe at reservoir
NO. 8 about. IA
Capacity of reservoir No. 2, Sc, 1000, e0t
gallons.
Capacity of reservoir No. 8, 5000, 0Ot
gallons.
Capacity of reservoir at Belleville, no
given.
Length of mains, some six miles, or So,
81. 500 feet.
1t is desirable if possible to postpone an,
expenditure for a new main, which has beer
proposed, and which would cost some 5000,
900 especially on account of present fnancia
conditions.
The city is investigating a new source 0
supply, the quality Of the water from tn,
present one being unsatisfactory.
In regard to the condition of the main
the statement of the Engineer of the waite
works, which is embodied above, is to b.
accepted, supplemented simply by such evi
dence as may be gathered by you in walking
over certain portions of the land.
We desire you to reper in regard to thu
present capacity of the mains, their suficienc,
for the given consumption, the measures, j
any, that may be taken to increase sale
capacity and the possible advantages ant
disadvantages of deferring or entirely leaving
out the building of the new additional mail
already referred to.
1t disposed to act, We would like to hav
either or both of you make an appointmen
to visit our works at your earliest convent
ence, SO that the required report may be hat
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