SEWAGE OVERFLOWS

In reply to Ms CHAPMAN (Bragg—Deputy Leader of the Opposition) (7 June 2007).

The Hon. K.A. MAYWALD (Chaffey—Minister for the River Murray, Minister for Water Security, Minister for Regional Development, Minister for Small Business, Minister Assisting the Minister for Industry and Trade): I am advised the overflow from the Garden Avenue sewer main on 3 June 2007 was caused by a blockage in the main next to a manhole on Glynburn Road, not by a lack of capacity in the main.

The blockage was caused by a quantity of tree roots which lodged in the main pipe where it enters a manhole on Glynburn Road. The blockage was cleared and the pipe was inspected internally with closed circuit television equipment. This pipe has previously been repaired and relined and is in good condition with no indication of tree root intrusion at this location. It appears that the bundle of roots responsible for the blockage had come down the Garden Avenue main from further upstream in the sewer catchment.