Lake Cowal
Lake Cowal from the air
Lake Cowal is located in New South Wales
Lake Cowal
Lake Cowal
LocationNew South Wales
Coordinates33°35′S 147°25′E / 33.583°S 147.417°E / -33.583; 147.417
Typeephemeral
Primary inflowsBland Creek, Lachlan River
Basin countriesAustralia

Lake Cowal is the largest inland lake in New South Wales, Australia. The lake is ephemeral, being fed by the small Bland Creek and by the occasional flooding of the Lachlan River. Despite this, it retains a considerable amount of water in about 70% of years.

Cowal Lake from John Sands 1886 map.[1]

Biodiversity

Lake Cowal is situated 47 km North East of West Wyalong and is home to a variety of endangered species. Some of these species include:

Recognition

The lake is listed on the now-defunct Register of the National Estate in 1992 and was added to the Directory of Important Wetlands in Australia in 1998.[2][3]   It is listed as a Landscape Conservation Area by the National Trust of Australia.}

Mineral resources and mining

The area surrounding the lake is rich in minerals - especially gold - and is currently being mined by Evolution Mining. Barrick Gold sold the Cowal Mine to Evolution Mining in 2015 for US$550m.[4] There is concern among environmental groups and the local Wiradjuri Aboriginal people that the cyanide used in the mining process prior to 2007 could lead to the contamination of the lake. The area was explored for gold in the 1980s and 1990s by North Limited, a subsidiary of Rio Tinto Group.[5]

The mine has been producing gold since 2006, and produced 238,000 ounces of gold in 2016. The resource is estimated to still contain approximately 5,000,000 troy ounces (160 t) of gold.[5]

Lake Cowal Gold Mine= The Cowal Gold Mine Project encompasses approximately 29 square kilometres as of 2023.[6] One hundred and eight million tonnes of low to medium grade ore would be excavated from an open cut pit 1 km wide and 325 metres deep on the lake shore and partly within the high water level of Lake Cowal to produce an estimated 2.7 million ounces of gold.[7]

References

  1. ↑ from John Sands, Atlas of Australia 1886.
  2. ↑ "Lake Cowal, Burcher Marsden Rd, Burcher, NSW, Australia - listing on the now-defunct Register of the National Estate (Place ID 16581)". Australian Heritage Database. Australian Government. 30 June 1992. Retrieved 1 January 2020.
  3. ↑ "Search result for "Lake Cowal/Wilbertroy Wetlands - NSW040"". Australian Wetlands Database. Australian Government, Department of Environment and Energy. 1998. Retrieved 1 January 2020.
  4. ↑ Validakis, Vicky (25 May 2015). "Barrick Gold sells Cowal Gold mine". Australian Mining. Prime Creative Media. Retrieved 28 December 2016.
  5. 1 2 "Cowal". Evolution Mining. Retrieved 28 December 2016.
  6. ↑ "Cowal Operation" (PDF). Evolution Mining. Archived from the original on 27 October 2022. Retrieved 2 January 2023.{{cite web}}: CS1 maint: bot: original URL status unknown (link)
  7. ↑ The location of the mine Cowal and gold production until December 2009. Archived 2010-09-20 at the Wayback Machine Barrick Gold, Global Operations, Australia Pacific, Cowal. Acceded 18 September 2010.
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