Lake Pedder

Lake Pedder, once a glacial outwash lake, is a man-made impoundment and diversion lake located in the southwest of 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 of Tasmania for the purposes of hydroelectric power generation.

Lake Pedder
Lake Pedder, c. 1970
Lake Pedder
Map showing Lake Pedder in Tasmania
LocationSouth West Tasmania
Coordinates42°56′S 146°08′E
Type
  • Until 1972: Natural, glacial outwash lake;
  • Since 1972: Reservoir, artificial impoundment, diversion pond
EtymologySir John Pedder
Part ofUpper Gordon River hydroelectric generation scheme
Primary inflowsFrankland Range
River sources
Primary outflows
  • Serpentine River
  • Huon River
Catchment area734 km2 (283 sq mi)
Basin countriesAustralia
Construction engineerHydro Tasmania
First flooded1972
Surface area242 km2 (93 sq mi)
Average depth13–16 m (43–52 ft) (as a reservoir)
Max. depth
  • +3 m (9.8 ft) (as a glacial lake);
  • 43 m (141 ft) (as a reservoir)
Water volume2.9 km3 (0.70 cu mi)
Surface elevation300 m (980 ft)
Islands
  • 2 (as a glacial lake);
  • 45 (as a reservoir)
References

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

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