30
modifications, to which reference will be made hereafter, the project as prepared Soy the Surveyor General, and charm in delait
on the cros lections which accompanied
letter of 28 Bults.
28&ults may
be considered as
providing sufficient strength to meet all The conditions of exposure and wave-stroke To which the mall and its foundations will be cubjected-
The point to which I desire more particularly to call attention,
pad wherein it appears to me that sove exceptio
man
be Faken to the design
is
The
madeapacy of the width of very on pubble Jank, immediately outside the lowest 1 gooting.
course ĥj Ins figured
the wall. This wristta
on the detail cross section as
2. feet; it should, in my opinion, be Increased vu, at least 4 feet, as that the
Cliar
clear width grubku bank outside the toe 5f the wall should not be less than b feet from The foot of the masowry to the edge of the
With a
of 2 feet, there would be an insufficient marging safety
اسلام مور
width
to provide for displacement on to /phoons o exceptional waves, not minder minute from possibly cause an muderuiming of the
foot of the wall.
If the section proposed core migidly adhered to, it right anuser
every propre for a considerable perest,
but exceptinol-circumstances would
arice sooner or later as in the case of the treat Empphoon of 1874 - when the extra width would be of vastal vimportance.
*
I would therefore strongly unge, as
matter of precaution, that the vero abroncs
be mcreased sin width as described above,
retaining