CO129-239 - Governor Des Voeus Acting Governor Stewart - 1888 [9-12] — Page 282

Enclosure

by this course, which has_

the advantage of showing deference to what

may

be

presumed to be the taxpayers

views.

3.

I enclose, also, the

"Plane which Mr Cooper has Enclosure &

prepared in connexion with

the scheme.

I have the honour to be,

sent separately by Parael Post.

My Lord, Your Lordship's Most Coedient

Humble Jervant,

que dewaux

SIR,

HONGKONG.

20

No. 88.

C. 0.

25851

REPORT ON THE SEPARATE SYSTEM OF MAIN-DRAINAGE.

REGE 31 DEC 8

Presented to the Legislative Council, by Command of His Excellency the Governon.

PUBLIC WORKS DEPARTMENT,

HONGKONG, 24th August, 1888.

I have the honour to transmit you the enclosed preliminary Report of Mr. F.

A. COOPER, on the Separate System of main drainage for the city of Victoria and

to recommend his propositions to the favourable consideration of His Excellency the Governor.

2. The adoption of the Separate System will be in harmony with the drainage

provisions of the new Public Health Ordinance.

3. The main features of the Project are four, viz.:-

(i.) The dissociation of the sewage of houses from storm-waters.

(i.) The rapid conveyance of the town-sewage to the sea and its innocuous disposal in the tidal current by means of separate glazed stoneware drain-pipes of a bore comparatively small because of the elimination of storm-waters.

(iii.) The admission of a limited proportion of rain-fall into these proposed

foul water drains; and

(iv.) The escape of storm-waters and sub-soil drainage into the seu as heretofore through the present main drains of the city which remain undisturbed.

4. The dissociation of house-sewage from storm-waters will so greatly reduce the volume of foul water to be dealt with, and will make that volume so manageable as to emble small diameters to be used for the principal arteries, aud due to this circumstance the project will be feasible at an outlay that is moderate compared with the relative expense that would attend the coustruction of the sume length of main sewers under the Combined System which requires-in consequence of our heavy rain-falls--that all channels be of an unduly large and costly size. The estimated cost of the four proposed new foul water mains comprised in this scheme, together with their branches and all contingent works amounts to $230,000, but as the eastern district of Victoria is found to be nearly on a dead level and as it is found impossible to give the proposed eastern main a gradient or inclination sufficient to induce a self-cleansing velocity, it will be necessary eventually to dispose of the

The Honourable FREDERICK STEWART, LL.D.,

Colonial Secretary.

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