Cordeaux River
The Cordeaux River, a perennial river of the Hawkesbury-Nepean catchment, is located in the Southern [Highlands (New South Wales)|Southern Highlands] and Macarthur, [New South Wales|Macarthur] regions of New South Wales, Australia.
Course
The Cordeaux River rises on the western slopes of the Illawarra escarpment, below Mount Keira within the Wollongong Local [government areas of Australia|local government area] and flows generally north and northwest, joined by the Avon River, before reaching its confluence with the Nepean River, south of Wilton. The river descends over its course.The river is impounded by Nepean Scheme#Cordeaux Dam|Lake Cordeaux], one of four reservoirs within the Upper Nepean Scheme that supplies potable water for greater metropolitan Sydney. Located near Ryans Crossing, approximately south-west of Sydney, construction of the dam wall on the Cordeaux River commenced in 1918 and was completed in 1926.