A new underground pumped-storage power plant will be used to pump water from Lake Limmern back up to Lake Mutt, which is 630 m higher. When needed, it can then be used to generate electricity again. The new facility will boast pump and turbine capacities of 1 000 MW each. This will boost the output of Kraftwerke Linth-Limmern AG (KLL) from the current 480 MW or so to 1 480 MW. In terms of performance, this will put it on a par with the Leibstadt nuclear power plant or the Cleuson Dixence hydroelectric power plant. The new pumped-storage power plant will ensure future security of supply in Switzerland.
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