The New York herald. [volume] (New York [N.Y.]) 1840-1920, 1875-03-15

Liberty street t.921 Grand street 1000
fhirteih Street West ss7 Broad street S5S5
Inc mean result OF which was 1888 grains In
every thirty cuoic inches OF water. Excluding
thereirom all the then city localities except Grand
street and West Thr:ieth street, there was found
that the average annual now OF silt into the rivers
1.2O9 grains in every thirty cubic inches OF water
and, assuming the quantity OF the former to be
equal 10 S per cs9 1o % en-, Gr0c nc
compared win water was therefore, AS l to
125e5. Side observations being confined 70
the city alone, there was found that the
volume OF the deposit from the water in the
slips between Thrrtieth street, east and west.
and the Battery, compared with that oil the water
these results appeared, they did not give full
exhibition OF the facts OF the case, Tor tue obser-
vations made were necessarily confined TO the
presence OF SILT and embraced only that portion
which was retained In suspension by the fow OF
currents, while the deposit OF detritus from the
dow OF gravel, sand, &C.. could not be arrived at.
In corroooraton OF the results attained Mr.. Has
we'll lurtner sald:-
The proprctors Of the Sectional DOCK that
the deposit OF SIT upon their tanks between the piers Of
Market and ike reefs averages fully nye sixieenths
are thereby subjected to the delay and cost Of dredging
years.
Again he instances:-
As an illustration of the effects OF the reduction by the
Of the aaany OF water which lowed into our harSor,
the Hood tide through the East River and Hell Gate once
Ter also he width Ct the channel inside Of The bar had
that from a report OF A. Borohke OF the Coast Survey
To Professor Bache the superintendent 1t appears
that in the main ship channel alone, from the Southwest
epit to edneys channel there had been actual de
post IN twenty years OF volume OF sand OF 25@oo
THESE ALARMING FACTS
existed and were made known July eighteen
years ago. II the tDen CONDITION or the har-
Dor involved CONSIDERATIONS demanding the atten-
ton Of all interested In the commercial interests
OF the city, how much more now Is remedial action
required, when year after year the work OF spolia
ton has continued and increased thOuss nd iod
Without such remedial measures The width oil the
become 50 reduced as to preclude the admls- lon
OF vessels OF the largest tonnage into our narbor.
what follows then surely, IL requires not o
prophet TO tell The deductions lurnished by the
Investigations thus made, as above referred TO, IN
1851 were as follows, and are worth remembers
Ing IN view OF the many new elements submitted
Since that PERIOD
First-lhat the deposit of silt and dctral matter into
the rivers bordering this city Is considerable III
amount that the sps are rapidly being hed; the bay
lamentations ana mats upon the shores OF Long Isl ana
anu New Jersey the Harlem RIVER and all places where
the current Is comparatively Feeble beng rapidly
sted up by the tdal currents; along with the
uual volume thereof is being reduced upon the extent
o. which udal volume uepcnls the vOlume of wafer
passing the bar OF sandy iiooka point involving the
conercial value, not the physical existence, OF THIS
harbur
Second-ihat the system OF the dredging OF slips
now pursued 0S57l-viz, the removal OF the dcnoss
hcrcln rom below low water depth, to be exposed TO
ne Surret IN inc rivers-encs IN but transfer OF them
vcVe the loss OF time and cost OF reremoval OF tho
deposits from the slips.
7n1d-Ihat by the tnoroush cleaning ofthc streets
snd piers OF this city, OF brooklyn and ncighbor ing