Tasmania's hydroelectric operator says it did not want to 'create unnecessary concern' for residents of a small town by releasing flood mapping, done in 2016, which shows what could happen should a rare earthquake event cause catastrophic failure of two dams — now with the maps public, the utility says there 'no need' to be worried.
Flood mapping for Huonville shows river rising at least nine metres within a day if upstream dams, built on active fault line, fail Flood mapping for a southern Tasmanian town and other communities on the Huon River have been released showing the level of inundation if two upstream dams fail in an earthquake.
"We tell the community about high risk bushfire zones. We plan and model for sea level rise. We tell the community that these risks exist where they live because they have a right to know," Greens emergency management spokesperson Tabatha Badger said.The flood risk will now become public knowledge. If Scotts Peak Dam was to fail in the same earthquake, a second flood wave would arrive after two days, peaking in Huonville at 15 metres and causing further widespread damage.
"It's those three things; you have to have your plan, you have to know where you're going, and you have to know what the area has to offer in case of emergency."Seismic activity is relatively common across Tasmania, but very few of the tremors are felt by humans. " is a substantial earthquake. Now, it's not necessarily going to happen in your lifetime or mine, but the things do happen," he said."There were assurances that there was absolutely nothing to worry about, that they had been built to the highest standards and met world requirements, but that was for a maximum magnitude of well below three."Hydro executive general manager of assets and infrastructure, Jesse Clark, said the risk of failure was low.
Edgar Earthquake Dam Flooding Pedder Scotts Peak Flood
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