Whistleblower site Sarawak Report has revealed that the controversial RM4.28 billion Murum Dam in Sarawak suffers from serious defects that can potentially cause a "catastrophic" breakdown.

The portal said project owner Sarawak Energy Bhd (SEB) was made aware of this problem as early as March this year, but had kept this from the public.

However, this has now come to light, with a report by Norwegian company Norconsult, which was tasked to carry out an independent assessment of the dam's turbines, was leaked to Sarawak Report .