CO129-168 - Sir Kennedy - 1874 [9-12] — Page 623

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pranded to collect

every

stream or flow of water from the mountains above and to receive such - is fit for use into the Aqueduct . In times

of flood

or when the water is in excess is Aurbid, it be made to flow to waste. There must be By Wash everflaws

may

on the line of conduct at such points as may safely pass any excess of water above the

stipulated line of ordinary flow.

Small

A service reservoir

future

may

be formed at

-

the town end in sugly manner that it may be supplemented at any time malang prarsun the first instance for moderate storage and at the least cost.

inv

The works executed at Iztam site should all be in the direction of future extensions but should at first be no more than will give the Aqueduct the feed of the ordinary flow- in dry weather. Works to increase the

then be carried on at some future

storage may Annie as

av

become available.

funds may The existing works at Pohfoolum, with improved Aqueduct - pipe, may be made to supply the higher levels only in wet weathers. The store of water in Pokfoolum Reservoir should not fodd be decun upon so long as the Tztam Works, when completed, can supply the mass of the population - The volume of 74 millions of Gallous should be preserved for dry periods of the year

and

4

1

only a stipulated number of Gallons should be drawn from it each day of such dry periods - 74 million Gallous will supply 500,000 Gallons por day for 148 days.

or 250,000 Gallons per

day for 396 days. During such periods the Iztam stream and conduct, with all its tributaries, will be collecting and delivering water to the Town.

The intervening vallies

by

Cast vrou

may

be crossed

Syphon pipes as shewn on Diagrams No 1, 2 and 3.

Syphon pipes 18 ine in diameter, loud with the fall sheurs, will deliver upwards of 11⁄2 millions of Gallons of water per day. At any future time, if the Iztam Impounding Reservoir is completed, and a larger volume

of water is

required, supplemental syphons

may

be laid - Great care must be taken to protect the inlets to the syphons by were screens or by gratings. There must be a wash-out-pipe and valve on the supphons at the lowest point in the valley in the Diagram.

as sheur

The wash-out pipes from the Aqueduct, need not exceed 18 miches in diameter.

all which

may

be

It is impossible to foresee and describe required for the works suggested. I wish havever to say in conclusion that the Colonial Engineer need not consider himself bound to follow any suggestions