Cordeaux River
Encyclopedia
The Cordeaux River is a tributary
Tributary
A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

 of the Nepean River
Nepean River
The Nepean River is a river in the coastal region of New South Wales, Australia.The headwaters of the Nepean River rise near Robertson, about 100 kilometres south of Sydney and about 15 kilometres from the coast. The river flows north in an unpopulated water catchment area into Nepean Dam, which...

, and hence of the Hawkesbury River
Hawkesbury River
The Hawkesbury River, also known as Deerubbun, is one of the major rivers of the coastal region of New South Wales, Australia. The Hawkesbury River and its tributaries virtually encircle the metropolitan region of Sydney.-Geography:-Course:...

, in New South Wales
New South Wales
New South Wales is a state of :Australia, located in the east of the country. It is bordered by Queensland, Victoria and South Australia to the north, south and west respectively. To the east, the state is bordered by the Tasman Sea, which forms part of the Pacific Ocean. New South Wales...

, Australia
Australia
Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

.

The headwaters of the river are located on the west slopes of the coastal escarpment some 10 kilometres (6.2 mi) west of Wollongong
Wollongong, New South Wales
Wollongong is a seaside city located in the Illawarra region of New South Wales, Australia. It lies on the narrow coastal strip between the Illawarra Escarpment and the Pacific Ocean, 82 kilometres south of Sydney...

 and the Pacific Ocean
Pacific Ocean
The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...

. The upper reaches of the river are impounded by the Cordeaux Dam. Below the dam, the river flows in a north-westerly direction before being joined by the Avon River
Avon River (Wollongong)
The Avon River, Wollongong, New South Wales, Australia, has its source about 4 km W of Calderwood and flows generally north into the Cordeaux River.This river is in the City of Wollongong Local Government Area and the Camden County, New South Wales....

 at a point just to the south of Wilton
Wilton, New South Wales
Wilton is a small town of the Macarthur Region, New South Wales, Australia in the Wollondilly Shire. It is home to a population of 1279 and includes the modern suburb development of Bingara Gorge. It is located within close proximity Cataract Dam...

. About 1 kilometre (0.621372736649807 mi) downstream of this confluence, the Cordeaux itself flows into the Nepean River. In total, the river is some 37 kilometres (23 mi) long.

The river is an important source of water for the Sydney
Sydney
Sydney is the most populous city in Australia and the state capital of New South Wales. Sydney is located on Australia's south-east coast of the Tasman Sea. As of June 2010, the greater metropolitan area had an approximate population of 4.6 million people...

 region. Water is collected by the dams, weirs and aqueducts of the Upper Nepean Scheme
Upper Nepean Scheme
The Upper Nepean Scheme is a series of dams in the catchments of the Cataract, Cordeaux, Avon and Nepean rivers of New South Wales, Australia. The scheme includes four dams and supplies the Macarthur and Illawarra regions, the Wollondilly Shire, and metropolitan Sydney.- History :The Upper Nepean...

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