29
8 ft. could be constructed for
about £10 per foot run. Length
d
of tunnel is estimates at 6,000
feet and cost of tunnelling
therefore would be £60,000.
This will replace expenditure on
excavation, concreting, and
special joints in Armstrongs
Tender for cross-harbour pipe line
would
working at £72,160. There will,
therefore, probably be a saving
as compared with the more
expensive pipe line. The
advantages of subway are that it
would be large enough to take
gas mains and electric cables as
well as two water pipes, that
pipe lines would be readily
available for inspection and
repair and that information
gained in constructing subway
would be useful in construction
fairly mentions howwwn that
it
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