GISBORNE SEWERAGE.

Gisborne Times, Volume XXX, Issue 3419, 10 January 1912, Page 5

GISBORNE SEWERAGE.

IMPORTANT DEPARTURE FROM ORIGINAL PLANS. GRAVITATION SCHEME EVOLVED. HOW SAVING CAN BE EFFECTED. An important report was received from the Borough Engineer (Mr A. J. Paterson) by the Borough Council last night regarding the sewerage system. The report read as follows: “An inspection of the levels of the various areas or systems now under construction, or still to construct has resulted in the following facts being brought out with such force that it will be necessary for you to consider them before much more work is done. Kaiti System.—“As will be seen from the accompanying plan, in the low portion lying north of the Esplanade, and for which a small septic tank is provided, the present houses, with , the exception of five can be connected with tlie main Kaiti gravity system. If these five houses were raised sufficiently so that the sewerage would gravitate and an order made preventing building in the remaining section below the sewer level, this tank could be cut out. The Council might also construct conveniences for these residents at the new level, and leave the houses intact. This area must in the near future be more a business locality than residential. Tlie ref ore I have to recommend the elimination of the septic tank estimated to cost £4OO, and the second method of dealing with the five low-ly-ing houses estimated to cost £l5O. Old Borough No. 1 Contract. — “The major portion of the Borough lying north of Childers Road, between Carnarvon Street and Roebufck Road, is higher than the sewerage level in the Stanley Road tank and by rearranging the levels of the Disraeli Street and Palmerston Road sewers, it would be possible to bring the sewerage from the area colored on the accompanying plan, to a manhole at the junction of Childers and Disraeli Streets at such a level that a 12-inch main laid across the Waiknnae at the position shown, would carry it by gravity to the tank. It would then be possible to connect the rising main from the Derby street pump to this system, and save the double pumping of this sewage at Grey Street, and efficient flushing could he provided by connecting the school baths outlet properly controlled as to quantity. The advantages of this alteration in reducing the duty of both _ Stanley and Grey Streets pumping stations will warrant the extra cost of the alterations. Victoria Township.—“ The gravitation main before mentioned will dominate that portion of Victoria Township. west of the leading lights and the Roberts Road pumping station should i be moved to the corner of Grey and i Awapuni Roads, so that a re-arrange- ! merit of the sewers in the eastern portion of Victoria Township would save a possible £250. This station would then he on such a position that the Grey system sewage, already reduced by cutting out the Derby Street effluent, would gravitate to it. The 5inch pumps could he installed here, and the 3-inch pumps used elsewhere. Considerable saving will result in electricity power cables and annual pumping charges, for No. 1 pump Instead of two in this locality, while tlie value of tlie steel pumping main cut out, would offset the stoneware sewer, necessary to connect the two stations. West End.—“ln this system there is a 12-inch sewer in private property which will be a costly undertaking, and I have to advise that the portion of this system not dominated by the Stanley Road sewer just laid be arranged to flow into a gravity main running north and south as shown on the accompanying plan. The alterations are more a matter of position than either size and length. The low portion lying immediately on each side of the railway at present un subdivided or built on is dominated by the Stanley Road pump, and can be drained after roads are made. Tramway access will cause the area lying north of Childers Road, and between Stanley and Lytton Roads to be subdivided and heavily populated and the elimination of this present and future drainage from the Stanley Road pump will reduce present working costs and increase the period before maximum duty is reached.” C'r. Darton inquired how the Council stood with regard to the Consulting Engineer. He wanted to know whether they were entirely free from him, and whether they could Scrap his scheme if they wished. Cr. Smith said they had already departed from Mr Mar chant’s scheme in providing extra manholes. The Mayor said they could call on Air Marchant at any time on the pay ment of £4O a visit, but his idea was that they had done with tlie consulting engineer. Cr. Darton said they had for the first time that night to depart from Mr War_ chant’s scheme, and he wanted to know where they stood. What position, he asked, would the Council be in with these five householders in Kaiti if they cut out the septic tank and raised the buildings. He moved that- the recommendations of the Engineer that the septic tank at the low-lying portion at the Esplanade be eliminated he adopted. Cr. Bright considered that it would be wiser to find out where they stood in the matter. Eventually the motion was amended by the addition of the words, “with the consent of the tenants,’’ and in such form was carried. Tlie Engineer’s recommendations in regard to the old Borough No. 1 contract were also adopted. Cr. Darton remarked that if the Borough Engineer had evolved a sewerage scheme by gravitation as against pumping, the Council should certainly adopt it. ~ With regard to Victoria Township; it was decided’ to adopt the Engineer’s recommendation, provided suitable arrangements can be made with the contractors. Cr. Smith said “'he considered Mr Paterson was deserving of thanks for evolving an improved scheme which would mean a large saving to the borough. He must have great faith in himself to recommend such a scheme, as lie would have to shoulder all the blame if it were not a success. He considered the Borough Engineer was to be complimented on bringing forward such a scheme. The Engineer’s recommendations with regard to the West End system were also adopted.