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Johnstown Flood matched volume of Mississippi River

New work determines flow rate of the 1889 flood that was one of America's deadliest disasters

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5:10pm, October 20, 2009

PORTLAND, Ore. — The devastating flow released when a dam burst upstream of Johnstown, Pa., in May 1889 transformed a small, normally tranquil river into a raging torrent that briefly rivaled the mighty Mississippi, a new study reveals.

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