The Albany register. [volume] (Albany, Or.) 1868-18??, 1876-04-07
TIE ,rrss1ss1Pr1 JErTIEs.

= 8
THE mTSSISSEPPI JETTIES.
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The mattresses have been runk i'll the
east jetty beyond the crest OF the bar,
while so tar all the work on that sea
wall has remained solid, and grows firm
er every day as the deposit on the exte-
rior of the work is rapidly covering IT,
as was expected OF counted upon, and
hence the work is being set as solid as
rock. On the western wall the work is
being laid from the outer end landmark.
As fas as both walls have been complet-
ed the depth between them has increas-
ed from twenty-five to thirty feet.
Though the attrition nearer the shore
is necessarily slower than further on on
account of the greater age and solidity of
the deposit. From the land outward
the channel OF the greatest depth has
been cut near the western wall as the
eastern jetty being completed first de-
tiected the line OF swift current as far
down as the line was completed enough
to illustrate practically the jetty theory,
while tolersbly uniform and constant
ly increasing depth has been obtained,
making the theory settled axiom.
On the arrival at the crest Of the bar,
which before the work was we'll COM
menced had only seven feet of water, q
depth almost Incredible to all but the
engineers in charge was demonstrated to
exist; as the boat proceeded the line
showed fourteen, sixteen and OCCASION
ally even eighteen feet. With lead
heaving at intervals less than one hun
dred feet apart all the way across the
bar in the channel OF the swiftest current,
fourteen feet was the least depth found.
After going to deep water the vessel re-
crossed the bar. In the channel men,
toned again they found the minimum
depth to be fourteen and the maximum
eighteen feet.
, The line of the greatest depth was
found to be about two hundred feet east
, from and parallel with the western,
wall, but extended far beyond the outer
end of that jetty. On the results men,
toned being practically demonstrated,
Captain Bassett said he was satisfied a
: steamer could go, draw wing fourteen feet
of water, to sea through this pass. Col.
Andrews added that yes, and tomorrow
he would guarantee to take a steam
vessel drawing sixteen feet over" The
first result of the work, that OF iIcreas-
ing the velocity of the current to such
/ degree as to enable it to hold great
, er amount of sediment in suspension and
to sever away the deposit, has been
practically reached, and the second, OF
course, follows as a corollary event,
which only needs very little time 10
, work out-that is, to scour ont enough
mud TO make the channel twenty feet
deep. The distinguished engineer III
charge stated that within four weeks, a
!, depth of water of eighteen feet across
Q the bar before South Pass would be a
, fixed fact.
The velocity of the current in tho
Pass has already been increased TO five
: and six feet per second by running e
q wall OF willow mattresses nearly 1000
= yards long before Northeast Pass Il
force more water down South Pass
: By this increased current, another .desir
n ed end, the cutting away of a little is
land i'll the head of the latter Pass, /
being gradually accomplished. 1t nee
!, essary to concentrate still greater vol
ume of water IN the improved Pass, j
e can be done by euchrdetiecting walls a
IS the head of the Pass at an expense com
. paratively triflirg to that required in th'
wall at the sea end In the presell
= condition of this great enterprise, LII
;, parties most concerned seem sanguine .
rs achieving complete success at a dat
|, much earlier than was expected a fev
months ago. With the current nov
Is controlled By works not near completes
and such results obtained by only PAL
a tally concentrating it on the bar,
d seems reasonable to suppose that by
,e tnrther concentration and dependel
current velocity, from finished wall
impervious to q lateral flow, dept
: will be obtained logically and actual
o. far greater than that required at I'll
p stipulated time.
! THE VALUE OF EDUcATIoN -Jal
vy1e heayf1 sIlifross ncroSs the fnnen III, I,