New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1852-02-23


loh Of August 1851, as above stated, and from tna
cate te the l6.h OF October. IS charges we're nred
isese were OF seventy eight pounds, and % we're
| Of one hundred and twenty 1--WE polnds eacn coo'
tairrg In all nine thousand three hundred ana n'y
SIX pouncs OF powder.
| In the month Of Of October last. Cheviler seen
| De Bile, Charge dAfares % Denmark, miie aopil-
cation to Professor Beche for information relative 20
Maieferts plan Of SUB marine blasting, ana az +,
the success attending his operations a. The ate aha
Was referred by him to Lieut. Bartlett, OF tue U.
Navy and Asst in the U. s. Coast Surrey theh anu
now on duty at the Gate Lieut.. Bartlett, In us re-
ply to the inquiry dated October is, 1851. wnich
Chevalier Steen de Bile Kindly permits US 10 useI
says when NJ Matielert commenced ms A. ~. =,
Pot Rock IN He'll Gate, there was nut e'sh. zee, a.
low water or be Rock can sysfy he dsseT'ea'
that there not less than slrteen feet al lor ieaf
1t would not be possible to reduce no. 49,
~ any other method of which have any kno"ieuso'
| than I'd at used by NJ. Maillefert'
By the ABOVE statement it will be seen that eis ~
| eet OF Pot Rock was broken down oy eisny'h'e
| submarine charges. ,.n,no,
hf,y eight charges of one hundred aud twenty -nVe
| pounds each, were fred on this Rock. consum 'hg
| seven thousand two hundred and NIFTY pounu' VI
| powder. -,h ~ M
| yember by Lieut.. Bartlett the result OF which ne
communicated in letter, Of which the iono"ins !"
copy 800. r.s Nov ,s,,
Mr. MERIAM-Dear Sir: have made very com
plete examination OF Pot Rock, at low tide tooa!
have to say no,c in anticipation OF the plopeu
fafer on any part Of Pot Rock at ou wafer fodiy
Ks soon as possible, will give you the pane OF
reference TO me an low water
Lieut. U s. N and Asst in the Coast Survey.
From the sth of November to the 18th of Decem
ber Dir ETY. ore charges, of one hundred and ~eny
five pounds each, we're fired on this rock consum-
ing eleven thousand three hundred and seven y
tive rouIds OF powder The greater portion OF
these charges were fred ia water OF more than
twenty feet in depth NTH rietc 10 theremardt Of the
Rock 10 the dtpfhof tpenty.fo,r feet.
thorough and very mlLute survey was made on
Pot Rock during the month of January. The sound
ings were mace every nine feet the length, and
every three feet the width OF the lock.
Area Of Pot Rock
At the depth of tweaty -four feet, the extreme
length Is two hundred ana twenty-five feet, and the
extreme width sixty feet
SOundmgS on Pot Rock.
Three hundred and sixty.sx sOundiDgs were made
on Pot Rock. with the following results:
soundings of 10 feet.
I sounoIDg OF 49, feet.
90 sOundines OF 1871 feet
s sOundings Of 1871 feet
81 soundings from 30 to 20f feet.
40 soundiDgs from 81 to oh feet.
% soundipgs from % to 22l feet.
81 sOundiDes from % to 23f feet.
1O7 souneings from "a to 80 feet.
The soundiDgs are reduced to plane of mean low
water.
Comparison of Depth before and since Blasting.
August /, Is5l-Mean low water, 8 feet.
August |, ls5i-Mean high water, lat feet
January, lS52-Mean low water, ~ feet
January, lS52-Mean high water, 25t feet.
Increased depth, eleven feet.
The highest point OF Pot Rock. as will be seen by
the soundlngs stated above, Is now nineteen feet un-
der the surface at mean lew water, the condition OF
this important thoroughfare, formerly and only SIX
months ago, of the most dangerous IN the world,
has undergone such change, that the old name and
designation, R1igate ought not to be used any more
This splendid result has been obtained by labor
of three months and twenty days, between the 18th
of August when the first charge was fired on this
Rock,) and the 10Th OF December, wnen the cold
weather compelled NJ. Maillefert to suspend opera
tons for a while. During this period, two hundred
thirty four submarine charges have been fired on Pot
Rock, (tuenty seven of which were OF seventy eight
pounds EACH and ftDo hundred and OF one hun
dIed and twenty-five pounds each) consuming in all
twenty. seven thousand nine hundred and sightyone
pounds OF POWDER as above stated
We propose to speak OF the Other Rocks as fol-
ious:
In addition to the breaking do wn OF Pot Rock, NJ.
Maillefert has removed dangerous Rock, described
on the Chart as Bald Headed Billy"
In communication addressed to US by Professor
Bache, SuPerinte ndeDt OF the Coast Survey, under
date Of Dec. 3, 1851, be says send an extract OF
a letter from Lieut. Bartlett, in regard to the re-
moval of ld-Headed Billy" The extract Is In tho
words following: "The work at hell Gate and its
approaches continues to produce valuable results.
In my last report, intimated that Bald Headed
Billv' dangerous rock lying near Hasey's or Hal
let's Dock, wide report of Lieut. Com. D. d. Por-
n, VI
molished and removed. have nov the honor to
report, that it has been done most efectually and
transported to deepest water In mid channel. ~
accurate measurement of this boulder, after SUD-
marine explosion had dislodget II from ITS bed, II
was found 70 be sixteen feet long, ten feet wide, aud
eight feet deep, and as was too heavy 10 De oaed
whole, il was then split by drilling, aud the tso
parfs &c parately foated away TO deep water, beng
ilfted by the Iron yncer floats at high wateI'
Tuo other g,rous rocks, opposite Nh. Edwin
Hoits mansion, have be EN- destroyed by M. Maiuc.
fert On one OF these locks a vessel was wrecked
shortly after he commenced operations at the Gaze
Eleven charges, of one hundred and twenty five
pounds each have been fired on Frying Pan, but no
survey has since been made OF that rock
Four charges OF ore hundred and twenty-five
pounes each, and three charges OF seyeny-eish
pouncs each, have been fired on Ways Rect. No
survey has since been made on this Reef.
Professor Bache, writing us In relation to the OPP
erations at the Gate, under date OF Dec 8, says:
81 hare rsceued rery interesting report from Lieut..
Bartlett" This report has been appended TO the an.
Bua report made TO Congress BY the superintendent
of The U. s Coast Survey and was presented to the
Senate and referred to the Committee on Printing
Mr. Borard, from that Committee, reported IN favor
of printing five thousand copies OF the report, and
the Sci ate adopted the report OF the Committee.
The Superintendent, Of the Coast Survey writes
us uI der Date of January -, that 1t will be several
weeks before this report will be printed. Therefore,
we shall not be able to lay 1t before tina public until
the printed copies are first placed upon the desks OF
the Members OF Congress.
Professor A d. Bache, Superintendent OF the U. 8.
Coast Survey, from the commencement of the agita.
on OF the subject touching the removal OF the rocks
at the Gate has afforded every facility and aid In his
power he takes a deep interest in this work
Tie /olle usng I,st of the of the persons.
firms and COMMERCIAL INSTITUTIONS wh0 have
made Advances an money sotcard defrayng the err
penses Of rsnorsng tAs rocks from the channel OF
Hnrf Gate vIz:
r Cottepett A. Woodruff,
Bernhard g. Hutton, Boorman, Johnston Co,
Robert B Minturn, l.. SuareZ,
John BrIdQe Mercantile Nut Ins. Co
Robert Kermit, Atlantic Mutual Ins Co.,
B,own Brothers e. Co, General Mutual Ins Co.,
lanes G. King Assor Mutual Ins. Co,
Adam Norrie, Union Mutual ms. Co.,
William b Astor, +. A. Delano, Jun,
Jacob Little A. ii Ward,
Goodhue Co., Geo. Deioress Co.,