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Appended to the' Water Supply Committee's report to be read at to-night's meeting of the City Council is a report from the City Surveyor on the proposed stormwater channel on the west side of the Robs Creek reservoir. Mr Mirams writes as follows :

I have made a trial Btuvey of the course of this proposed channel, and find that the length from the upper basin to the fall over into Ross Oieek below the turnstile at entrance will, be about twenty-three chains. To continue the channel northwards from the upper basin to the creek above the present inlet will require an additional length of five ohains. The cost of the lower seotion (twenty-three ohains), if lined with concrete for its whole length and provided with timber shoots where required, I estimate approximately at Ll,Boo, and this cost will cover a oompleteand permanent work so far as this length is concerned. The cost of the additional length of five chains, or proposed upper section, I estimate at L 470, or ,a total for the whole length of twenty-eight chains of L 2.270. As expressed to the Committee on the ground, I am of opinion that the construction of this upper eection would not be of any great advantage, especially as it is the object of the Committee to limit the expenditure to a point within the present resonrces of the Oouncil. With this end in view I have considered that it may be practicable to adopt an open unlined channel for nearly the whole length ■from the upper basin down/ to the creek, lining *nly the inlet and other weak places along its oouree, also the narrow portion at the intersection of the lower embankment. This, with a timber shoot down the first slope near the embankment, would involve an expenditure of about L 650. This method is only advisable on the supposition that the channel would rarely be used—say for a few hours in a series of years—and that it would exist solely as a prevention againct very extraordinary floods. In order to convey the channel clear of the embankment, and discharge the water into the creek clear of and below the present bridge, it will be necessary to acquire some additional land from Mr Chapman. I have called several times to see Mr Chapman, jun,, but he will not be in town until this evening. In calling for tenders for the work it can be made optional to leave out any of the parts of the lining that could be dispensed with after the ground was opened out. Tenders, of course, to be invited upon the above estimated expenditure of L 650. As respects the time in which the work could be completed, I think it would not be well to do the concrete work before the frosts are gone, but when commenced it should be completed in about ten weeks.

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Bibliographic details

THE BOSS CREEK RESERVOIR., Issue 7967, 24 July 1889

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THE BOSS CREEK RESERVOIR. Issue 7967, 24 July 1889

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