Mersey - Forth

The Mersey-Forth catchment is in the north-west of Tasmania. It uses water from four main rivers – Fisher, Mersey, Wilmot and Forth. Lakes high in the Western Tiers feed the rivers below and in turn the power stations.

The Mersey-Forth catchment is a run-of-river system, this means that water keeps on flowing. In other hydro systems there are large storage areas and water is stored for medium to long periods.

Rowallan Power Station

Lake Rowallan is the major storage for this catchment and supplies the Rowallan Power Station. Water flows to Lake Parangana. 
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Fisher Power Station

Water from Lake Mackenzie flows via canals, tunnels and pipes to the Fisher Power Station. The water drops 650 metres to Fisher then runs into Lake Parangana.
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Parangana mini hydro

A late addition to the Mersey-Forth scheme, the Parangana mini-hydro was built in 2002. A study in 1998 found that the Mersey River would benefit from increased flow from Lake Parangana. This provided the conditions for a feasible mini-hydro station.
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Lemonthyme Power Station

Water from Lake Parangana is transferred west via tunnels to Lemonthyme Power Station. The water runs into Lake Cethana.
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Wilmot Power Station

Water from Wilmot River is stored at Lake Gairdner by the Wilmot Dam. Water is transferred by tunnels to Wilmot Power Station and then flows to Lake Cethana.
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Cethana Power Station

Water from the four Mersey-Forth rivers meet at Lake Cethana where the water runs through the underground Cethana Power Station. It then flows into Lake Barrington.
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Devils Gate Power Station

Devils Gate Dam holds water in Lake Barrington which is used in Devils Gate Power Station. The water continues its flow to Lake Paloona.
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Paloona Power Station

The power station uses water stored in Lake Paloona. It is the last power station in the Mersey-Forth catchment before it flows out to sea.
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