At least nine dams have breached or failed in South Carolina since Saturday, the state's emergency management agency said early Tuesday.
One failure, of the Overcreek dam in Richland County's Forest Acres, sent a torrent of floodwater raging downstream and forced evacuations near Columbia.
Officials allowed water to breach at least one other dam, also in Richland County. Officials conduct these controlled breaches “to prevent a much larger incident and a much larger amount of water escaping from the dam,” emergency management spokesman Derrec Becker said.
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