Concern, warnings over sinkholes at Wanaka's Bremner Bay

Bremner Beach sinkhole
Bremner Beach sinkhole. Photo credit: Queenstown Lakes District Council/Facebook

A dozen deep sinkholes at a popular Wanaka beach have sparked warnings from authorities.

The Queenstown Lakes District Council has put up warning signs and fenced off the largest hole, which is almost 1.8m deep and 1m wide, at Bremner Bay.

Some locals say they’ve been there for a while, but harbourmaster Marty Black told Newshub he's never seen anything like it.

“It’s rather odd,’ he says. “You put your foot on them and you move it around a bit, and your foot goes through the crust of the earth into quite spongy, yucky mud.”

A geologist from Land Information New Zealand will investigate in the new few days.

Until then, Mr Black advises users of the beach to take care, particularly children and the elderly.

“We don’t want to close the beach off at this point in time, because it’s quite a busy area, but people should be aware.”