The two dams of Lake Gabiet are located in the municipality of Gressoney-La-Trinité, at the beginning of the valley of the Lys stream, a name derived from the high peaks of the Monte Rosa massif: Western Lyskamm (4,481 m asl) and Eastern Lyskamm (4,527 m asl), which feed it. The main dam is located to the south, the other to the north. 

The valley is also home to the Walser community of Germanic origin, which settled in the 12th-13th centuries in the Italian, Swiss and Austrian Alps and still speaks Titsch, a dialect of German origin. The Gressoney hydroelectric plant was built at the same time as the Gabiet dam in 1921. Upgraded in 2012, it has always guaranteed - thanks to its qualities that place it in the category of reservoir hydroelectric plants - the security of continuity of power supply to utilities even in the event of a power grid blackout. 

Construction work to replace the penstock (built in 1918) with a new one that was installed on an alternative route to the existing one was completed in 2017.

This plant is part of one of the Energy Tours routes.

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