Or as safe; 230.000 people died in just one instance (https://en.wikipedia.org/wiki/1975_Banqiao_Dam_failure). 112 people died building the Hoover Dam (https://en.wikipedia.org/wiki/Hoover_Dam#Construction_deaths).

Compare that to what are considered massive world news nuclear power plant tragedies like Chernobyl (about 31 direct deaths, long term effects are up for debate: https://en.wikipedia.org/wiki/Deaths_due_to_the_Chernobyl_di...) and Fukushima (1 direct death, low counts of radiation poisoning that can be attributed to it: https://en.wikipedia.org/wiki/Fukushima_Daiichi_nuclear_disa... ).