Work on Nepean Dam started in 1925, but was interrupted for a few years by the Depression and resumed in 1933. Materials were hauled on a standard gauge railway line from the main southern line near Bargo.
The dam was finally completed in 1935 and cost about $12.3 million. After several years of extremely low rainfall in the catchment, heavy rainfall in October 1938 saw the dam finally reach capacity and overflow via its spillway.
Nepean Dam was upgraded in 1992 at a cost of $30 million. It was strengthened by post-
Height: 82 metres
Length: 216 metres
Capacity: 70,170 megalitres
Catchment: 320 square kilometres
Lake: 3.3 square kilometres
Distance & direction from Sydney: 95 Klms SW
Avon Dam Road, Bargo
Tel: 1300 722 468