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a buttress should be provided to lend additional support
to the rockfill, having a width of about 70 ft., and a
thickness of 30 ft. at the base measured in horizontally, and
5 ft. at the top. The corewall should be grouted when the
reservoir is drawn down as far as possible.
SUPERVISION
It is advised that the supervision of any exploratory
or remedial measures be carried out under Mr. Hull who
would be prepared to undertake this work without remuneration.
I have the honour to be,
Sir,
Your obedient servant,
(SD) W.J.E.BINNIE.