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The original lake was flooded in the 1970s amid many protests. The current lake covers 242 square km and is formed by three rock fill dams - Edgar, Serpentine and Scotts Peak.
See also Lake Gordon. The two lakes were created in the 1970s. Together they contain 1/3 of Tasmania's hydro-electric energy storage and form Australia's largest water storage, being 27 times the size of Sydney Harbour. The two lakes are linked by 2.7 km McPartlan Pass Canal and drive a power station that's 183 m underground and produces 14% of Tassie's electricity output.