The Seattle Times

Steve Ringman / The Seattle Times
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Tuesday, March 4, 2014

Drawdown eases pressure on Columbia dam crack

Wanapum Dam in Grant County, built in 1959 and more than a mile long, can generate more than 1,000 megawatts of power. Water levels are being lowered 20 feet because of a failure risk from a 2-inch wide crack that stretches 65 feet along the base of one of the dam’s spillway piers.