Butlers Gorge Power Station

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Clark Dam
The Clark Dam wall with the Butler Gorge Power Station located at the wall base.
Butlers Gorge Power Station is located in Tasmania
Butlers Gorge Power Station
Location of the Clark Dam in Tasmania
Country Australia
Location Central Highlands, Tasmania
Coordinates 42°15′36″S 146°15′36″E / 42.26000°S 146.26000°E / -42.26000; 146.26000Coordinates: 42°15′36″S 146°15′36″E / 42.26000°S 146.26000°E / -42.26000; 146.26000
Purpose Power
Status Operational
Opening date 1949 (1949)
Owner(s) Hydro Tasmania
Dam and spillways
Type of dam Arch dam
Impounds Upper River Derwent
Height 67 metres (220 ft)
Length 378 metres (1,240 ft)
Dam volume 159 thousand cubic metres (5.6×10^6 cu ft)
Spillways 1
Spillway type Controlled
Spillway capacity 687 cubic metres per second (24,300 cu ft/s)
Creates Lake King William
Total capacity 539,340 megalitres (19,047×10^6 cu ft)
Catchment area 575 square kilometres (222 sq mi)
Surface area 41.45 hectares (102.4 acres)
Power station
Name Butlers Gorge Power Station
Coordinates 42°15′36″S 146°15′36″E / 42.26000°S 146.26000°E / -42.26000; 146.26000
Operator(s) Hydro Tasmania
Commission date 1951 (1951)
Type Conventional
Hydraulic head 49 metres (161 ft)
Turbines 1 x 12.20-megawatt (16,360 hp)
English Electric Francis-type turbine
Installed capacity 12.2 megawatts (16,400 hp)
Capacity factor 0.8
Annual generation 684 gigawatt-hours (2,460 TJ)

The Butlers Gorge Power Station is a conventional hydroelectric power station located in the Central Highlands region of Tasmania, Australia.

Technical details[edit]

Part of the Derwent scheme that comprises eleven hydroelectric power stations, the Butlers Gorge Power Station is the first station in the scheme. The power station is located aboveground at the foot of the concrete arched Clark Dam across the River Derwent that forms Lake King William. Water from the lake is fed to the power station, coupled to one of two discharge regulating valves to ensure water flow to Tarraleah Power Station located further downstream.[2][3]

The power station was commissioned in 1951 by the Hydro Electric Corporation (TAS) and officially opened on 22 November 1952. The station has one English Electric Francis turbine, with a generating capacity of 12.2 megawatts (16,400 hp) of electricity. The station building houses a single alternator and the turbine has a fully embedded spiral casing with water flow controlled via a butterfly type valve. It also houses a 125 kVA diesel generator for alternate station services supply when needed. The station output, estimated to be 684 gigawatt-hours (2,460 TJ) annually,[1] is fed to Transend Networks’ transmission grid via an 11 kV/110 kV three-phase English Electric generator transformer to the outdoor switchyard.[2]

The water discharged from the Butlers Gorge Power Station flows via three conduits to either Nieterana mini-hydro, Tarraleah Power Station, or to Wally’s Weir and back into the Derwent.[3]

See also[edit]


  1. ^ a b "Register of Large Dams in Australia" (Excel (requires download)). Dams information. Australian National Committee on Large Dams. 2010. Retrieved 23 June 2015. 
  2. ^ a b "Butlers Gorge Power Station: Technical fact sheet" (PDF). Derwent Catchment. Hydro Tasmania. Retrieved 4 July 2015. 
  3. ^ a b "Derwent: Butlers Gorge Power Station". Energy. Hydro Tasmania. Retrieved 4 July 2015. 

External links[edit]