CO129-241 - Governor Des Voeus - 1889 [1-7] — Page 583

sewage matters in the event of sewage being forced into the sub-soil drains, the evil effects of using the same drains for the conveyance of

and soil-waters are too well known to require further comment.

sewage

Mr. LEIGH in raising objections to the adoption of the Separate System on pages 11, 12 and 13 of his report seems to have entirely ignored the provision I have made for carrying off the rain-water. Over the whole of the Chinese part of the town I have allowed 2.40 inches per 24 hours which after deducting the water supply leaves a margin of at least 2 inches of rainfall per 24 hours to be admitted into the sewers, and further the steep gradients the sewers must necessary have in this district will enable them to discharge into the intercepting sewer even more than this quantity, the intercepting sewers as stated in my report being relieved by the overflows direct through the Praya Wall into the harbour.

The flooding of ground floors and the injury to merchandise I consider is practically out the question most of the houses in the Chinese district will have better provision under the new system proposed for the getting rid of storm water from the back yards than they have at present.

The question as to whether street washings ought to be allowed into the storm water drains is also raised by Mr. LEIGH. It will no doubt be advisable in some of the streets to admit by means of small gratings the dry weather flow into the sewers, but the regular scavenging and the absence of animal excreta all the carrying being done by human labour, very much reduces its objectionable character. The hawking of vegetable produce in the streets should be limited as far as possible and seeing the extensive market accommodation the Government are providing I presume this practice will be very much restricted.

As the advisability of constructing the intercepting sewers at present in view of the proposed Praya Reclamation project will doubtless receive the careful atten- tion of the Authorities in England I forward a plan shewing a series of outfalls along the Praya arranged so as to provide for the discharge of the sewage into the harbour and at the same time admitting of their being ultimately picked up by the intercepting sewers proposed by me should circumstances necessitate the adoption of such a course.

If the intercepting sewers are abandoned the Scheme will not provide for the drainage of Causeway Bay reclamation.

I estimate the cost of the project without the intercepting sewers at $195,000.

I have the honour to be,

Sir,

Your obedient Servant,

The Honourable J. M. PRICE,

Surveyor General,

&c.,

$0.

FRANCIS A. COOPER,

Sanitary Surveyor,

Public Works Department.

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