WAINUI PIPE LINE.

Dominion, Volume 3, Issue 701, 29 December 1909, Page 8

WAINUI PIPE LINE.

;: &L ■ :■-•','-- 1 - ,♦ .~- " '■' ■'■', '■'',7- ; ; ; f ;QUESTIC|N:6f DUPLICATION;-/ ; Tho pi'pe-linp from . tho Wainui. Eescr- • voir to town will probably have somo : attention given to it bijforo the New . lea'r is far advanced, and another effort ■ will bo made to have tho lino duplicated. ; As;.far back as 1904,. the city engineer' (Mr., W. ,'H. Morton),: iii :a report to tho. r council on the preserit'pipe-line, advised 1 that -the inain would be sufficient for five or t six"years.' Mr:. Morton's time-limit . has riow.been.reached, and'the'extension ,of .the city'has 1 meanwhile gono on to i such an extent that something will have ; to''bo dpne in ' the near future. '• The I straightening. ;pf tho Hutt railway-line . was one bf; the ' works , tho city engineer ; considered/should be well' on : the way ;, to. completion-bef ore. tho. new pipe-lino was Jaid, and this. work is now, progross- • ing towards completion. The new- bridge ~. over-the Hutt--River isalso almost com 1 -. i' pleted, so that 'e'verything appears to be'ready for a,final discussion of whether ' the-duplication should not be, gone on with. ■■■.-': /•/-..■- . . 'In June last the city engineer expressed ; the opinion that the time for the dupli- ' '.cjition of the main/had arrived. As stated" / : /above, when it-was. proposed to under-. '. .take thpiwrk some years ago (190-1), Mr. j. Morton reported" to the council, giving 1 reason for. postponement until' about the ■■ present., time, and. the., council fell "in with the report. In the course of the ■: , report submitted in 1904, Mr. Morton l! mad© tho -following, remarks:—"ln providing for '■ either additional storago or '■ mains, it is. necessary^to,arrive..at: the • present .maximum daily consumption. [■ <The records bf tho Venturi meter show : jthat during last summer the maximum' >' /draw oftY-tho iWainui main-per'diom -was -. /riotmore than 3,000,000,. and by ' measurement of the - v daily/- reduction ' ;in , tho level of 'the.-'Karori/ "< Eeser- \ 'voir it.can bo.seen.'that''riot.' r mdre than 1 '500,000 gallons per."'diem:.-are../supplied , :fibm that so,urce; v or , a..,tbtal-of 3,500,000 " gallons. Assiimirig. ;the population now supplied to bo- 45,000. a maximum,daily ' 'consumption is" not more than. 78 gallons \. -per head. The report, after referring to storage question, went on to say thattho , /storage capacity: recommended, " viz., ,- -219,000,000 gallons, would be sufficient at ; 78 gallons -per head,- for a population oi '- 75,000 for 75 . days, : or > at CO gallons for ■ ;a period; of ,144 days. ' , /Eegarding the inadvisablbness of coiri- .; mencing tho work • of duplicating the ■ Wainui main at. that time, Mr. Morton 1. said: "I consider.-, tho present. ..Wainui '. main to be, capable , of ! '-'delivering." at '■ Therndpn fully's,ooo,ooo gallons per day, . against a/pressure;of 1001b.- to tho sqiiaro .' inch. If increased storage at-Karori were : ; provided, so.that 1,000,000 gallons per day :, could be drawn from' that, source, the • present mains supplying the "city could i ; be safoly relied/., upon .. to discharge 1 6,000,000 gallons per day, which would " bo sufficient until tho population is well ' : 0yer,60,000, until which time I have to recommend that the construction of a ;new main-'to Wainui he' deferred. In' linking this recommendation, I am aware of certain risks, that are run, through - probable failure:of the Wairiui.main, duo ,; to its being carried under three .streams , which, aro liable ,to--scour, and which, in" my opinion,- should have been bridged over. At tho same time, I think it inadvisable to lay another large main along tho present Hutt Eoad if there is a prospect of the proposed/now rOad being constructed within five or six years.''