Howard A. Hanson Dam is an earthen embankment dam on the Green River 21 miles (34 km) east of Auburn Washington. The dam was completed in 1961 and its primary purpose is flood control along with water supply for Tacoma Washington. After the dam’s reservoir reached record levels in January 2009 the U.S. Army Corps of Engineers discovered seepage in the right abutment of the dam leading to efforts to mitigate a potential flood.
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