A dam is a barrier across flowing water that obstructs, directs... - dofaq.co
dam failure

A dam is a barrier across flowing water that obstructs, directs...

wikipedia - 13 Feb 2017
A dam is a barrier across flowing water that obstructs, directs or slows down the flow, often creating a reservoir, lake or impoundments. Most dams have a section called a spillway or weir over or through which water flows, either intermittently or continuously, and some have hydroelectric power generation systems installed.

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