Windamere Dam

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Windamere Dam
Windamere Dam is located in New South Wales
Windamere Dam
Location of the Windamere Dam
in New South Wales
Country Australia
Location Central Tablelands, New South Wales
Coordinates 32°46′15″S 149°38′34″E / 32.77083°S 149.64278°E / -32.77083; 149.64278Coordinates: 32°46′15″S 149°38′34″E / 32.77083°S 149.64278°E / -32.77083; 149.64278
Purpose Hydro-power, irrigation, water supply, and conservation
Status Operational
Construction began 1974
Opening date 1984
Owner(s) State Water Corporation
Dam and spillways
Type of dam Embankment dam
Impounds Cudgegong River
Height 67 m (220 ft)
Length 825 m (2,707 ft)
Dam volume 1,740 m3 (61,000 cu ft)
Spillways 1
Spillway type Uncontrolled unlined rock cutting
Spillway capacity 6,270 m3/s (221,000 cu ft/s)
Reservoir
Creates Lake Windamere
Total capacity 368,120 ML (13,000×10^6 cu ft)
Catchment area 1,070 km2 (410 sq mi)
Surface area 2,030 ha (5,000 acres)
Max. water depth 58 m (190 ft)
Normal elevation 552 m (1,811 ft) AHD
Power station
Type Conventional
Installed capacity 2 MW (2,700 hp)
Website
Windamere Dam at www.statewater.com.au

Windamere Dam is a minor ungated rock fill with clay core embankment dam with an uncontrolled unlined rock cutting spillway across the Cudgegong River upstream of Mudgee in the Central Tablelands region of New South Wales, Australia. The dam's purpose includes hydro-power, irrigation, water supply, and conservation. The impounded reservoir is called Lake Windamere.

Location and features[edit]

Commenced in 1974 and completed in 1984, the Windamere Dam is a minor ungated dam, located approximately 19 kilometres (12 mi) south-west of Rylstone. The dam was built by Abignano Pty Limited on behalf of the New South Wales Department of Land and Water Conservation to supply water for irrigation and potable water for the towns of Mudgee and Gulgong.[1][2][3] Windamere Dam operates in conjunction with Burrendong Dam to supply water to the Cudgegong and Macquarie valleys.[1]

The dam wall constructed with 1,740 cubic metres (61,000 cu ft) of rock fill with clay core is 67 metres (220 ft) high and 825 metres (2,707 ft) long. The maximum water depth is 58 metres (190 ft) and at 100% capacity the dam wall holds back 368,120 megalitres (13,000×10^6 cu ft) of water at 552 metres (1,811 ft) AHD. The surface area of Lake Windamere is 2,030 hectares (5,000 acres) and the catchment area is 1,070 square kilometres (410 sq mi). The uncontrolled unlined rock cut spillway is capable of discharging 6,270 cubic metres per second (221,000 cu ft/s).[1][2][3]

Geotechnical problems included excessive grout takes in highly fractured rock in the dam foundation. The dam foundations are weathered Devonian conglomerates, sandstones and shales. The spillway is located about 1 kilometre (0.62 mi) away from the dam wall in mostly unweathered Ordovician andesite. The spillway is an unlined rock cutting that provided all the rock fill required for the construction of the dam embankment. If a spillway had been built in the weathered sedimentary rocks at the dam site full concrete lining would have been required.[4]

Power generation[edit]

A hydro-electric power station generates up to 2 megawatts (2,700 hp) of electricity from the flow of the water leaving Windamere Dam.[1]

See also[edit]

References[edit]

  1. ^ a b c d "WIndamere Dam" (PDF brochure). State Water Corporation. 2009. Retrieved 22 April 2013. 
  2. ^ a b "Register of Large Dams in Australia" (Excel (requires download)). Dams information. The Australian National Committee on Large Dams Incorporated. 2010. Retrieved 22 April 2013. 
  3. ^ a b "Windamere Dam". Water delivery: dams. State Water Corporation. Retrieved 22 April 2013. 
  4. ^ Woodward, Richard (2005). "Windamere Dam". Some of My Dam Projects. Retrieved 22 April 2013. 

External links[edit]