Lago Ritom

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Lago Ritom
Location Piora Valley, Ticino
Coordinates 46°32′24″N 8°41′21″E / 46.54000°N 8.68917°E / 46.54000; 8.68917Coordinates: 46°32′24″N 8°41′21″E / 46.54000°N 8.68917°E / 46.54000; 8.68917
Type reservoir, natural lake
Basin countries Switzerland
Surface area 1.49 km2 (0.58 sq mi)
Max. depth 69 m (226 ft)
Water volume 48 million cubic metres (39,000 acre⋅ft)
Surface elevation 1,850 m (6,070 ft)

Lago Ritom is a lake in the Piora valley, Ticino, Switzerland. The natural lake is used as a reservoir by the Swiss Federal Railways (SBB-CFF-FFS) to generate hydro-electric power for the Gotthard line. The first dam was built in 1918 and, in 1950, its height was increased by 23 m.


The lake's surface area is 1.49 km² at an elevation of 1850 m. With Lake Cadagno and Lago di Tom, it is one of the main lakes in the Piora valley.

Before being used as a reservoir, Lake Ritom was a meromictic lake similar to the nearby Lake Cadagno.


The lake can be reached by funicular from Piotta 786 m below. The track with a length of 1,369 m has a maximum inclination of 87.8%,[1] the highest in Europe after the Gelmerbahn funicular (106%).


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