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of 1879, where the center 0.5 mi of the bridge was completely destroyed while a train was crossing in a storm. The bridge was inadequately designed and its replacement was built as a separate structure upstream of the old.
* The failure of the South Fork Dam in 1889 released 4.8 billion US gallons (18 billion litres) of water and killed over 2,200 people (popularly known as the Johnstown Flood).
* The collapse of the St. Francis Dam

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