Some say the Warragamba Dam wall needs to be raised to help prevent the devastating floods seen in Sydney this week — but there is a cost upstream too.

Raising the Warragamba Dam wall in Sydney’s west could threaten at least 330 sensitive Aboriginal sites discovered so far, according to a confidential Heritage NSW memo which describes environmental planning conducted by WaterNSW as...

An archaeologist recruited by consultants for WaterNSW to advise on the Aboriginal significance of an area set to be flooded by the controversial Warragamba Dam wall raising said he was hired as a public...

At the same time as Sydney was being inundated with the biggest downpour in 50 years and its main dam was spilling billions of litres of water, a simmering internal Coalition rift emerged.

The New South Wales government tried to avoid paying nearly $3 billion in compensation for environmental damage expected to occur as part of its plan to raise the Warragamba Dam wall and flood large...

The emergency evacuation of thousands of Western Sydney residents living in flood-prone areas has been 200 years in the making, climate experts say.

As flood water spills into the Hawkesbury-Nepean Valley, NSW’s plan to increase the reservoir’s height by 17 metres has come to the fore. But experts say it won’t reduce flood risk when it really...

The flood emergency in Sydney's west has raised questions about whether more could have been done to alleviate the risks.

Tensions over the management of Sydney's Warragamba Dam are rising as quickly as the dam itself with major disagreements between senior state government cabinet ministers.

Raising the wall of the Warragamba Dam by 14 metres to hold more floodwaters — as proposed by the state government — would probably have had little impact on the current floods, experts have...