Wilmington journal. [volume] (Wilmington, N.C.) 1844-1895, 1856-02-29

aNo advertisement rejecting upon private character
can under CIRCUMSTANCES be admitted
above stated furnish nsuperabe objections to srue
erected for purposes improvement outside OF the har
bor Piers can only direct the existing force OF water or
protect without materially increasing its action ana tneaF
the shore line and bar without any increase in the depth Of
"ur.ments History of the successive difficulties has now
been given, which will afford means of determining the
value of the expedents designed to meet them.
1t is evident that plan for the complete improvement
should embrace three requisites; .,.,, uo,-
ing the Oyster Shoals
2nd. The 6xaton the toruous and variable terminus
of the channel through the marsh. And,
3rd, That the plan should be such to give greater
depth of water upon the bar
have plans offer for the attainment of these OBJ
jecs both of which by operating within the harbor cal
cuaed existing Obstacles and the time to
I 's an
Plan lst propose to avoid the shell obsructons by
the marsh Creek Cove passing through the
join the main channel by easy curve This cut
with surface width of 300 feet The stream should be
fined the between dykes submersbe at hatide
The direction of the cut should be adjusted to cmVe
1ch1ch shall compel the Of the tide rnUari
able tn of eretlon In except between ncorroda
bic banks, straight cuts advisable Nature adopts
them Rivers deveop their length according to nvaria
law, which determines the enaciy of banks capable of
resisting certain velocity recommend an artificial deve
opment conformabe to this principle think it important
close the old channel at its junction with the by
hearng of clay and ascines in emoankmen OF Garth
The present channel be kept for purposes OF nay
CATION until the completion of this cut. Wood cannot be
used unless proectedrom the action of the toedo Shells
the available material loses its weight and cohesion a
short exposure The cost of imported stone will great
increase the estimate for structures which require the use
of that material propose, therefore, if found less
pensve beton hydraulic concrete which has the ad
vantage of being made upon the spot of required ze
estimate for the cut through marsh, 81 900 cubic
yards, at 20 cents per yard $12 400 90
Add 20 per for rehow. 2,4S0 90
Add for ciosPg old channe SO co
Cost of dredgng through marsh .........s6.I3 1870 90
TIL MS plan proposes another cut through WrghG Island
ter. The principle which should determine its dimension,
should that by which the supply made equal to the
with three hundred feet gradually widening ANY attempt
to concentrate the action must be attended by correspond
ing loss of tidal it is therefore, better to sacrifice
what might be gained by concentrations to increase of
Permanency be given the banks by the of
stone. would commend closing the N. w. branch, and
solid embankmen between the and the n E branch
would advise against the closing of those channels which
be permitted remain without injury to the
ment The banks would be unable the increased
velocity of the current without additional protection Ma
ture the demand upon her by network of small chan
ne and increase of velocity without equivalent So
dIheaon OF the banks would give rise to channel more
toruous than the present lhe Objection therefore, is
by opng the protecting by shells exposed
points Sketch No exhibits the appearance of the river
after this Improvement The letters show the points OF
tho position Of the guiding walls Of hydraulic concrete
The length of the cut ,77O fee having midchanne
Amount of dredging 49, 48O cubic yards of light
, odo er material at 6 cents per yard S2a,o65 90
Cost of closing water way r.. $50 90
Cost of Improvement through Wrght Island $3s 645 90
This plan would, believe, give foot greater depth up
The plan sky s se h an PEUgh sTt te ef
deep The dredged material should be placed each side
Of the channel between those shoals which perpendicular
to its and the heads of the shoals afterwards linked
together to become subservient the plan improve
inert. The which heaps up the shell islands
would it may Re thought, be still operative in closing any
pnann huttI
would afford protection against the prevailing Winds while
the momentum of the stream being function of its depth,
would forever keep the channel free from deposits The
dredging should be continued through the sand shoa ppo
site swans Point. From the : point of the marsh,
commencing at the marsh to extend S 81 deg. min w
S2 metres thence 81 deg 45 min $50 metres and last
1910 feet 1t be composed chiefly of shell dredged from
the new channel and from points.
| lhe dredging for his cut will amount to 10000
Gu e96lo yards, at 20 cents per yard ....$4,Oo 600 90
Material for cy, 400 cubic yards 20 $50 90
Cost of dredging through the oyster islands $50 90
marsh
1t will necessary to remove the natural shell cttv near
the head Of the middle channel The of this channel
should be freed from shoals the sharp angles cut of and
w. branch should be closed and also the passage of the
dry middle shoal 1t may be fouud necessary form shoal
at tn, the mouth of the n r; Branch.
entrance to the should be enlarged and deepened
guiding walls Of hydraulic stone should be built
as shown upon the sketch No. ,.
These objects be accomplished by the expenditure Of
$l5, 100 90. Decision between these plans involving
question of expenditure with limited means
Lection to the judgment of the Board. The estimates
do not include the machinery contracted for by the Compa
ny.
few words in regard to the pe1Gaency the improve
ment The marsh being aluval deposit the point of
conflict between the andOod and the ocean, question very
naturally arises to its rate of increase The gradual
walton Of the bed of the river above the Instructions may
so be locked for comparison with the survey Of 1897
shows remarkable in the boundaries of the
marsh An apprecabe deposit the bottom the
below Sneads Ferry detected The small the
deposit and the afforded by the large ndens furnish
good grounds for the conclusion that many years eape
before danger need be appehended from this The
improvement will the deposit to tahc place in the in
dents The river however, labors under difficulties
that engineering science hardly obviae The growth
oyster has constant tendency to Obuc and
divert the channel thus producing serious changes The
Quicksand Bar must be subject the varying influence
of storms.
must acknowledge myself greatly indebted the Super
ntendent of the Coast Survey for instruments and
tons used in the progress of the operations
] am, very respectfully, gentlemen
Your obedient Servant
5. THAYER A BEKT,
Civil Engineer
The New Orleans EieceIon Riots.---RemovaI from
Office.
New ORLEANS, Feb. 2O.-The legislature of this
State has passed act removing Joseph Hufty, the
present incumbent (American) Of the sherlfaty of
New Orleans. The bill passed both branches of the
i