__NOTOC__ Stausee Ferden ("Ferden reservoir") is a

reservoir A reservoir (; ) is an enlarged lake behind a dam, usually built to water storage, store fresh water, often doubling for hydroelectric power generation. Reservoirs are created by controlling a watercourse that drains an existing body of wa ...

on the Lonza river at

Ferden Ferden is a Municipalities of Switzerland, municipality in the district of Raron (district), Raron in the Cantons of Switzerland, canton of Valais in Switzerland. Besides the village of Ferden itself, the municipality includes the hamlet of Goppen ...

Valais Valais ( , ; ), more formally, the Canton of Valais or Wallis, is one of the cantons of Switzerland, 26 cantons forming the Switzerland, Swiss Confederation. It is composed of thirteen districts and its capital and largest city is Sion, Switzer ...

Switzerland Switzerland, officially the Swiss Confederation, is a landlocked country located in west-central Europe. It is bordered by Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east. Switzerland ...

. Its surface area is . The lake has the shortest

lake retention time Lake retention time (also called the residence time of lake water, or the water age or flushing time) is a calculated quantity expressing the mean time that water (or some dissolved substance) spends in a particular lake. At its simplest, this fi ...

in the world.

See also