Cethana Power Station

Cethana Dam
Location of the Cethana Dam in Tasmania
Country Australia
Location North-western Tasmania
Coordinates 41°28′47″S 146°8′1″E / 41.47972°S 146.13361°E / -41.47972; 146.13361Coordinates: 41°28′47″S 146°8′1″E / 41.47972°S 146.13361°E / -41.47972; 146.13361
Purpose Power
Status Operational
Opening date 1971 (1971)
Owner(s) Hydro Tasmania
Dam and spillways
Type of dam Embankment dam
Impounds Forth River
Height 113 metres (371 ft)
Length 213 metres (699 ft)
Dam volume 1,407 thousand cubic metres (49.7×10^6 cu ft)
Spillways 1
Spillway type Uncontrolled
Spillway capacity 1,980 cubic metres per second (70,000 cu ft/s)
Reservoir
Creates Lake Cethana
Total capacity 112,210 megalitres (3,963×10^6 cu ft)
Catchment area 610 square kilometres (240 sq mi)
Surface area 41.4 hectares (102 acres)
Power station
Name Cethana Power Station
Operator(s) Hydro Tasmania
Commission date 1971 (1971)
Type Conventional
Hydraulic head 98 metres (322 ft)
Turbines 1 x 100 MW (130,000 hp)
Fuji Francis turbine
Installed capacity 100 megawatts (130,000 hp)
Capacity factor 0.85
Annual generation 434 gigawatt-hours (1,560 TJ)
Website
hydro.com.au/energy/our-power-stations/mersey-forth
[1]

The Cethana Power Station is a conventional hydroelectric power station located in north-western Tasmania, Australia.

Technical details

Part of the Mersey–Forth scheme that comprises eight hydroelectric power stations, the Cethana Power Station is the fifth station in the scheme. The power station is located underground and is supplied with water from Lake Cethana which is fed by the outflow from the Lemonthyme Power Station on the Mersey River and the Wilmot Power Station located below Lake Gairdner, and uncontrolled flow from the Forth River. Water from the station is returned to the Forth River through a tailrace tunnel which has a tailrace gate structure at the outlet portal.[2]

The power station was commissioned in 1971 by the Hydro Electric Corporation (TAS) and the station has one Fuji Francis turbine, with a generating capacity of 100 megawatts (130,000 hp) of electricity. The station output, estimated to be 434 gigawatt-hours (1,560 TJ) annually,[1] is fed to the outdoor switchyard via a three single-phase 13.8 kV/220 kV Fuji generator transformer.[3]

See also

References

  1. 1 2 "Register of Large Dams in Australia" (Excel (requires download)). Dams information. Australian National Committee on Large Dams. 2010. Retrieved 23 June 2015.
  2. ↑ "Mersey - Forth". Energy. Hydro Tasmania. Retrieved 3 July 2015.
  3. ↑ "Cethana Power Station: Technical fact sheet" (PDF). Mersey-Forth Catchment. Hydro Tasmania. Retrieved 3 July 2015.



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