TAKAPUNA DRAINAGE.

New Zealand Herald, Volume LXIII, Issue 19470, 28 October 1926, Page 10

TAKAPUNA DRAINAGE.

; PROVISION FOR OUTFALL. 4 s HARBOUR BOARD'S CONDITIONS. Some concern was caused at Takapuna by the publication in yesterday's Herald of the objection of the Auckland Harbour Board to the outfall of the borough sewerage system at St. Leonards Road, which was misinterpreted in some quarters as signifying a condemnation by the board's officials of the system under 1 which sewage is to be discharged into the Gulf. When the letter from the board . came forward at last evening's meeting of 1 the Borough Council, it was found to • apply merely to the distance to which the > outlet is proposed to be carried out into t Rangitoto Channel. The board's contention is that it should be extended further than is proposed bv the borough en- •' gineer's designs. s Mr. A. 11. Wilkie, chairman of the i Public Services Committee, pointed out f that the engineer's scheme was quite in 1 accord with those of the city outfall at 2 Orakei and the Devonport outlet at North Head. Extreme care was taken by • the council to secure the purity of the s Takapuna and other beaches. ! In discussion of the matter it was menj tioned that before the sewerage scheme j was adopted flotation tests were made i by Messrs. Bush and Watkins, consulti ing engineers. The borough engineer, Mr'. A. Slinger, - said he had proposed to make the under-' 3 sea length of tbe outfall 200 ft., but it l had been agreed that the length should r be the subject of a conference between r himself and the harbour engineer, and t that conference had not yet taken place. It was resolved to ask the Harbour r Board for information as to the method • adopted by it in making its float tests. s One important respect in which th*» s Takapuna discharge scheme is an improvement upon the others now in operaI tion in the harbour is that at both the i Clifton and the Black Rock outfalls the - ongineer has provided for large storage . tanks, capable of holding many days' acr cumulation of sewage. By this means el the effluent can lie held back whenever . the weather is adverse, until it can be discharged under conditions wh v.'li will i. assure that it will he carried out to the j open ocean, with no risk of being driven back upon beaches. e j