Blockage leads to wastewater in lake

A blocked sewer pipe led to about 5000 litres of wastewater ending up in Lake Wakatipu via a drain into Horne Creek early yesterday.

The Queenstown Lakes District Council was investigating the cause of the blocked pipe yesterday but said contractors had reported it appeared to be gravel and stone.

Following the discovery, the blockage was removed, the foreshore where Horne Creek meets the lake disinfected and the water tested.

As a precaution, a small area of beach around the creek outlet was closed yesterday, the council infrastructure and assets general manager Erik Barnes said.

Because of the blocked pipe, pressure had forced the liquid up through a manhole.

The council said it was too soon to say what had caused the overflow, but contractors who cleared the blockage said that there appeared to be gravel and stone, possibly from construction debris, in the pipe.