786 [=147] (V.2)

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786

and ease off the passage of the
escape water by length of channel
as well as by artificial protective
expedients.

3rd To fix the sites of all escapes
in such a position that there may
be a plunge into the bed of the re-
-ceiving channel, and that the
high water mark of the latter
may in no case interfere with
the free discharge of the water
from the canal.

4th To make the escape build-
-ings a component part of other
works, or, should this not be pos-
-sible, to place them in such close
proximity to bridges and chokies,
that they may be easily accessible
and properly looked after.

5th Independently of original
excavation which is devised simply
on economical principles; that the
escape channel when perfected
shall in addition to the initial
slope of 12 inches from the bed of
the main channel which is given
to the tail of the escape head, have
a slope of bed equal to 1.5 feet
per mile, the superfluous slope
being overcome by permanent
works in masonry, adapted to
the particular circumstances
under which the escape channel
is situated.

From Roorkee, therefore,
downwards the sites of escapes
for the relief of the canal channel
have been determined on the
above principles, unless there
have been reasons which will
be fully explained, for their having
been departed from.

It

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