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Nepean Dam information


Nepean Dam
The curved arch dam wall
Nepean Dam is located in New South Wales
Nepean Dam
Location of Nepean Dam in New South Wales
LocationAvon Dam Road, Bargo, New South Wales
Coordinates34°20′07″S 150°37′01″E / 34.3353731497°S 150.6169604400°E / -34.3353731497; 150.6169604400
PurposePotable water supply
StatusOperational
Construction began1926
Opening date1935
Construction costA£2,062,000
Built byErnest Macartney de Burgh
Operator(s)Sydney Catchment Authority
Dam and spillways
Type of damArch dam
ImpoundsNepean River
Height (foundation)82 metres (269 ft)
Length216 metres (709 ft)
Elevation at crest325 metres (1,066 ft) AHD 
Width (crest)6.1 metres (20 ft)
Width (base)68.6 metres (225 ft)
Reservoir
CreatesNepean Reservoir
Total capacity81,400 ML (17,900×10^6 imp gal; 2.15×1010 US gal)
Catchment area319 square kilometres (123 sq mi)
Surface area356.5 hectares (881 acres)
New South Wales Heritage Register
Official nameNepean Dam
TypeBuilt
Criteriaa., b., c., d., e., f., g.
Designated18 November 1999
Part ofUtilities – Water group
Reference no.01368

The Nepean Dam is a heritage-listed dam split across Avon in the Wingecarribee Shire and Bargo in the Wollondilly Shire, both in New South Wales, Australia. The reservoir created by the dam spreads across Avon, Bargo and also Yerrinbool in Wingecarribee Shire. The Nepean Dam is one of four dams and weirs in the catchment of the Upper Nepean Scheme, in New South Wales, Australia, and provides water to the Macarthur and Illawarra regions, the Wollondilly Shire, and metropolitan Sydney. Completed in 1935 under the supervision of Ernest Macartney de Burgh, the dam is currently managed by the Sydney Catchment Authority and is listed on the New South Wales State Heritage Register.[1]

  1. ^ "Nepean Dam". New South Wales State Heritage Register. Department of Planning & Environment. H01368. Retrieved 2 June 2018. Text is licensed by State of New South Wales (Department of Planning and Environment) under CC-BY 4.0 licence.

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