CO129-392 - Governor Sir May - 1912 [9-10] — Page 21

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MONGKOKTSUI BREAKWATER É FUGGESTED MODIFICATIONS WITH REGARD % 2.00T 12,

TO CONSTRUCTION OF SUPERSTRUCTURE.

The rubble mound forming the breakwater has now been

ometrusted to such a height that at Low Water there is a

depth of omly about 9 feet of water over it (vide onelosed

drawing on which the stone already deposited is coloured

dark grey). The rubble is being conveyed to the site of the work in large junks which draw about 8 feet and are provided

with derriek apparatus of a simple type by means of which

the stones are hoisted and dropped into the water. They are

unprovided with any apparatus which would enable them to

deposit stone at any considerable distance measured from the

side of the vessel.

According to the design prepared by Messrs. Goode, Son

& Matthews, the entire hearting of the breakwater above the

level of Ordnanse Datum, which is just a foot above Low Water

level, is to be of half-ton rubble. With the craft and

apparatus available, it would be necessary, in order to carry

on the work expeditiously in accordance with this design, to

deposit, without intermission, the whole of the hearting,

extending from the existing level of the rubble up to the

underside of the påtobing which will form the protestive

sovering of the mound. Under this arrangement, the next

step in carrying on the work would be to commence the con-

struction of the breakwater im sections at several points

practically to the finished limes and these would gradually

be extended in both directions until they met.

The objestion to this mode of construction is that, in

the evmat of may considerable storm occurring, some of the

rubble would almost sertainly be displaced and it would be a

matter of considerable difficulty to restore the mound to

its proper section.

With a view to removing any such risk, I propose that

the