> How come hydroelectric dams don't get treated this way? In 2019 a dam in Brazil had a catastrophic failure that cost the lives of 270 people. Brumadinho wasn

> How come hydroelectric dams don't get treated this way? In 2019 a dam in Brazil had a catastrophic failure that cost the lives of 270 people. Brumadinho wasn't a hydroelectric dam; it was a dam containing leftovers from iron mining (see https://en.wikipedia.org/wiki/Brumadinho_dam_disaster https://en.wikipedia.org/wiki/Brumadinho_dam_disaster for details). Apparently, this kind of dam has a very different design from hydroelectric dams (according to https://en.wikipedia.org/wiki/Tailings_dam https://en.wikipedia.org/wiki/Tailings_dam, "Unlike water retention dams, a tailings dam is raised in succession throughout the life of the particular mine.").