Warragamba Dam wall plan could cause 'irreversible' damage, NSW premier told

Letter from 20 scientists and ex-ministers, including Peter Garrett, condemns plan to raise dam wall

A group of prominent scientists, former environment ministers and conservationists have written to the New South Wales premier condemning legislation to raise the Warragamba Dam wall.

The $670m plan to raise the dam wall by 14 metres was announced by the NSW government in 2016 as a strategy to prevent catastrophic flooding in outer-western Sydney.