According to the passage how many times has the south fork dam broken since 1831

It was broken two times since 1831. The dam broke following a few days of to a great degree overwhelming precipitation, discharging 14.55 million cubic meters of water from the supply known as Lake Conemaugh. With a volumetric stream rate that incidentally squared with the normal stream rate of the Mississippi River, 2,209 individuals, as indicated by one record, lost their lives, and the surge represented US$17 million of harm.