A Tasmanian government business will reinforce a Lake Pedder dam over earthquake concerns, but risk assessments over what would unfold if it failed have not been made public.
abc.net.au/news/row-over-dam-near-lake-pedder-tasmania-spend-plan-edgar/101490520Hydro Tasmania is planning to spend $20 million strengthening a dam that was built on a fault line, with recent studies showing a one in 10,000 chance during any one year of an earthquake bringing it down.
The dam was built in 1972 on top of the Lake Edgar fault line, but as seismology research has improved in Australia in recent decades, Hydro re-examined the risk of catastrophe. Restore Lake Pedder convenor Christine Milne said the public had the right to know this risk, and the documents should be made public.
The works involve putting more rock on the downstream side of Edgar Dam and excavating the pond to check it's on solid foundations.
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