Isaingking who offers to do the work for bocents a cubic yard. The Breakwater, if extended to a length of 20 yards as shown in the plan, will contain 245,778 cubic yards of stone which at 60 cents a yard comes to $147,466.80.
I have shown the subsidence of the foundation to a depth of 10 feet below the seabed, but if trial borings are made along the crest of the bank and it is found that the bottom is much softer than I have supposed, it will be necessary to allow a margin for sinkage and this may somewhat increase the estimate of the Cost. What this increase (if any) will amount to, can only be determined by a detailed survey of the locality.
I have discussed with His Excellency the Commander-in-Chief the proposition to sink hulks laden with stones as an alternative to the scheme for a breakwater. Commander-in-Chief Hamilton concurs with me that there would be but little advantage in such a project. The junks would sink into the mud in course of time and their masts would be the only obstruction to the passage of an enemy's ships, but the ravages of the teredo navalis in these seas are such that the masts of the junks would soon be destroyed, leaving the passage unimpeded as before to vessels of light draught.
These same objections apply to a line of piles, the cost of renewals of which would be heavy and continual.
5. J. M. Price,
27 January, 188...
Page 210
Page 211
Isaingking who offers to do the work for bocents a crabic yard. The Breakwater, if extended to a
·length of 20voyants
as shown in
the
778cubic
many will contain 245778 cubic
stone which at to cents a
yants of
yani
comes to $1500s.
subsidence
I have shew the
of the foundation to a depth of 10 feet below the seabed, but if trial brings
are made along the
crest of the bank and it is found.
that the bottom is much
has been reported
ما
softer
than
me;
it will
be necessary to allow a
margin for
sinkage and this mare somewhat
increase the estimate of the Cost.
what this increase (if any)
(if any) will
amount to, can only be determines
by
a detailed survey of the locality.
I have discussed with
His Excellency the comical formaning in thref the proposition to sink pints
laven
207
laken with stones as an alternative
to the scheme for a breakwater. Comical. i'm thinking
Hamilton concur
with that there would be but little advantage
in such a project. The junks would sink mito The wund in crane of time and their masts would be the only obstruction to the passag. of an everry's ships, but the ravages of the
terreds navalis in these seas are such- that the masts of the junts woned som be destroyed- leaving the passage
mimpeded
light draught.
as before to vessels of
These same objections apply
to a line of files, the cost of renewals
of
which would be heavy and. 'antinnal.
5. J. M. Price,
57
27: January, lem.
Page 210Page 211
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