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Lake Pedder

Lake Pedder, once a glacial outwash lake, is a man-made impoundment and diversion lake located in South West Tasmania, Australia. In addition to its natural catchment from the Frankland Range, the lake is formed by the 1972 damming of the Serpentine and Huon Rivers by the Hydro-Electric Commission for the purpose of hydroelectric power generation.

As a result, the flooded Lake Pedder now has a surface area around 242 square kilometres (93 sq mi), making it Tasmania's second-largest lake.

In early 20th century, the original lake was named after John Pedder, the first chief justice of Tasmania. The new artificial impoundment received the official name of the original lake. Although the new Lake Pedder incorporates the original lake, it does not resemble it in size, appearance, or ecology.

The new lake consists of an impoundment contained by three dams:

The dams were designed and constructed by Tasmania's Hydro Electric Commission (HEC) as part of the Upper Gordon River hydroelectric generation scheme. The aim of this scheme was to increase Tasmania's capacity to generate hydroelectricity in accordance with the Tasmanian government's policy of attempting to attract secondary industry to the state with the incentive of cheap, renewable energy.

The new Huon Serpentine impoundment, which filled after the dams were completed in 1972, drains into Lake Gordon via the McPartlan Pass Canal. Together, the lakes form the biggest water catchment and storage system in Australia.

Lake Pedder has an oceanic climate (Köppen: Cfb).

Protests occurred in Tasmania and mainland Australia at the flooding of the original lake, before, during, and after construction of the dams. Protests began when in 1967 the Tasmanian government revoked the status of the Lake Pedder National Park that had protected the lake since 1955. The role of the HEC as a surrogate wing of the Tasmanian government was perceived when the political or wider social dissent against the HEC power over the Tasmanian environment seemed impregnable. Tasmania's political leader, Premier Eric Reece and Allan Knight, the HEC commissioner, were seen as the leading proponents of the damming of Tasmania against any opinion to the contrary, and were not averse to taking their opinions to statewide and national advertising campaigns asserting their right to dam the lake.

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former lake in Tasmania, Australia
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