Does anyone know the story of the dam break of Baiguochong Reservoir in Gushi County in 1960, and really drowned tens of thousands of people?

I come from Gushi, Ji Fang, which is true. My father and my uncles were on it, but they survived, and they also took part in salvaging the bodies. At that time, the downstream included Lengshui/Chestnut Garden in Ji Fang Township, Guolutan Township and Nandaqiao Township, and the bodies on both sides were like firewood. When the reservoir was completed, men and women in the county went into battle together. At that time, people were full of energy and lived under the dam at night. People have nowhere to go, and no one has organized evacuation. I didn't expect more than half of the dam to collapse after it was repaired ... 10 thousand people must have been killed. At that time, the engineering director and commander-in-chief was Shi, who was said to be a woman and fierce. At that time, the information was very closed, and I don't think the province and the central government knew about it. There is no version to disclose this. I don't know how it was handled at that time. Which victims should be given a statement! ! !