CONFIDENTIAL, ##
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4.
Bored tunnel
The bored tunnel has to descend to a depth of 87 m below P.D. to get below the seabed. A longer tunnel will be required.
5.
Apparently the feasibility of constructing a tunnel connection between Lantau and the mainland has been studied by the Consultants, Messrs. Wilbur Smith, who does not favour the idea for the following reasons :
(i) a direct crossing from the mainland to Lantau
will interfere with freedom of movement and anchorage capacity;
(ii)
high ground on the mainland opposite Ma Wan;
(iii) seabed conditions are not ideal, but rather
adverse to the feasibility of a tunnel. Sediments are limited in extent and depth, and rock outcrops are located throughout the crossing; and
(iv) costly excavation and slow progress due to
difficult site conditions.
..:
G.F. 323
CONFIDENTIAL
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