Lac de Pérolles, a lake formed by Maigrauge Dam, is a reservoir on the Saane/Sarine river at Fribourg, in western Switzerland. Its surface area is 0.35 square kilometres . The dam was built in 1872, and its height was increased by 2.5 metres in 1910. The watershed is 1,250 square kilometres . The Maigrauge Dam has a gated spillway.
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