New-York tribune., 1875-11-29
THE MISSISSIPPI JETIIES.

SATISFACTORY PROGRESS OF THE woRK-REPoRT OF
CAPT EADs's COMMISSION OF ENGINEEEs.
The Commission of Engineers called by Capt.
Eads to consider his plans for constructing etes at the
mouth of the Mississippi have recently examined the
work progress at the South Pass Gen. j. g. Barnard
Sir Charles A. Hartley, W. Minor Roberts, Prof Henry
Mitchell, and II. d. Whitcomb present After some
discussion il recommended by the Board tilat the
space GOO the north end of the west etty
and the shore, across which piles now driven and
being laid should not be closed until the east
etty snail have been raised to s iull night ont 70 %OIet
depth Of water Mr. Eads having lnt,matSd , % 70 tne
ciates that depth OF 20 feet should be obtained
az The mouth OF the South Pass as soon as p0sslpe e
Board recommended i'll consideration or DlT. Lads .
representation that provisional Jety heads iVo eet ~
both jeties aud tha the construction OF these WorAs
IN conformity with the cross section oi Jety preseneod
by Mr.. Eads.
with reference to the permanent etty heads the Board
SAYS that construction, regards profile Ia.enes
stones, and piles should be nearly as possible iGenti-
al with that OF the jey yheads at the new mouth OF the
Man, where the stones employed IN exposed POSITIONS
mattrcsswOrn Tas charged wilh hal1 Ton 0l stone.
The Board also snSs that IKE covering OI stone on
the mattresses should W employed IN constructing the
eies At the South Pass w-r-yer they are aoIe 10 DO
attacked by heavy seas" - ,
ton OF the work wncn has been performs INC 7ou,h
Pass Of The Mississippi Is found by tie Commission 70
regard 20 its fitness for furnishing open mouth OF
ample depth largest class of seagoing vess6ls IN
tory he able tO state positively after four months or
actual operations the work Of pildriv ing extend
ing from the lands end to 26 feet depth beyond the
bar crest, along line 2l miles in length, covering
nearly the whole length OF the eastern jctty, and
AN examination OF the texture Of the bar and or
the shoals which the work 10 resi-, Tur-
nsh the most satisfactory evidence Of bottom ma
only adequate to bear all the necessary WORKS
hut tO suggest that but for motives OF economy
fnuarrCs being dsdnD the eties, at tile mouth or
the DANUBE might be made wholly OF stone. The Com
mission, therefore, uuhcsitangly announces tnat the
supposed attributed engineering difficulties OF con
NJ urs al pf
Mississippi depending on pccullaries oi tue Slssr-
sipp delta are lisoty. In iact the execution VI the
ks less diclt than that OF several recent sue
cesafnl wOr ~ the kind on European shores, known TO-
and examined by members Of the Commission. This
facility Of execution Hrlsea IL measure, from the lact
the broad, lateral shoals almost Dare al low Walc
which extend seaward from the lands ends marginal 10
the emanuel form very good protection 10 the proposed
works and almost reduce them to the grade OF mere river
works until the outer edge Of the bar is reached. The
deep water portions, outside the bar OF the proposed
jetues. are comparatively short Wne these portions
have the dimensions and strength OF exposed sea
works they offer difficulty not common TO Otcr slu
larry exposed works nov existing.
rne Commission consider the present an opportune mo-
ncnt record It's opinion. First, thdt the pnYsc&
characteristics the delta ana bars the Mississippi
and Danube. similar in many important rSIe -.
Aud secondly, that owing to tbe greater sea depth in
datcy beyond the OF its bar 70 the existence <
tipwgter 10 the apparent greater anr2d ng forces aO
the coast aud the extreme fncnesS OF the sand OF VIII
bai i composed tAe mouth Of tho South Pass Of te
Mississippi b, susceptible OF successful improve
meut notwithstanding the greater trhdity of lis uylal
current, than the Siina mouth O the Danube When
n 1898. the construction Vf parallel piers com
mcuced which secured 10 the navigation Of that river
depth OF y y feet IN 1861 Ind OF 2O2 feet az the present
time mUre than the works originally de
signed u obtain; aud thl- at the mouth OF uier-aim
dcAarsug less tuan One-third Of tho volume OF water
discharged by the South Pass