Mauvoisin Hydropower Scheme Switzerland Project Description Since commissioning of the power stations Mauvoisin in 1956, relatively large sedimentation occurred in the Mauvoisin reservoir, consisting of deposits of fine sediments, the “Glet- scherschliff” (approx. 330,000 m3/ yr). The sediment deposits have reached the intakes of the power and bottom outlet tunnels. If the water level is lowered under a critical level,

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