About UebrigCH Dam

The UebrigCH (Rest of Switzerland) category aggregates hydropower reservoir storage from all Swiss cantons not separately classified as Wallis, Graubünden, or Tessin. This includes the central and northern Alpine cantons of Uri, Bern, Glarus, Schwyz, Nidwalden, and Obwalden, as well as smaller contributions from Fribourg, Vaud, and the Bernese Oberland. The combined storage capacity is approximately 1,300 GWh (around 1,105 hm³). The most significant hydropower complexes in this aggregated region are the Grimsel system in the Bernese Alps — comprising the Grimselsee (KWO Kraftwerke Oberhasli), Räterichsbodensee, and Oberaarsee — which collectively form one of the most sophisticated pump-storage systems in Switzerland. The Grimselsee reservoir at 1,908 metres altitude is capable of pumping water uphill to the Oberaarsee during periods of surplus grid electricity (from wind or solar), then generating on demand during peak price periods. The Linthal 2015 expansion project in the canton of Glarus added 1,000 MW of pump-storage capacity through the underground Muttsee cavern scheme, making it one of the largest such projects in Europe. The Sustenpass, Susten, and Reuss river catchments feed into this region's storage network. The Aare river — Switzerland's longest entirely domestic river — originates in the Bernese Oberland from the Aare Glacier and flows through the Grimsel, Brienz, and Thun lakes before reaching Bern and eventually the Rhine. Alpiq and Axpo are among the dominant operators across the cantons in this aggregated category.