CO129-490 - Public Offices - 1925 — Page 276

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(c) Whether we consider it necessary that the blockwerk

should be weighted to assist consolidation before

the superstructure is built;

(6) On my contingent points which bear directly or

indirectly on (e).

11. From a careful examination of the drawings

forwarded by the Pert Engineer må information previously

available, it appears that the depth to which the trench

has been dredged along the line of the wall varies from 25

feet to 55 feet below the surface of the mud; that a length

of approximately 1,400 feet of this trench has already been

dredged and ne mention of difficulty in its formation or

maintenance is recorded; and that the side slopes of the

trench as indicated on the drawings are comparatively steep.

Hercover, the rubble bank with which it was proposed in 1922

to retain the filling was to have been founded directly an

the mud as is, we gather, now being actually done at the

Quarry Bay and of the reclamation.

12. in view of the foregoing we conclude that the uud

compusing the surface of the sea bed at this site must be of a consistency omsiderably stiffer than as described in the report from Mr. P.R.Varren which ascompanies Mr. Baker':

menerandum, We are of opinion, however, that with the

alteration in design from a rubble bank to a vertical deep-

water wall, it was visely decided to take the foundations

at this site dom in a trench to a solid stratum wherever

practicable.

13.

Mr. Duncan's modified design, with the surface of

the sand in the foundations limited to the level of 47 fest