The Grandval Dam (French: barrage de Grandval, French pronunciation: [baʁaʒ ɡʁɑ̃val]) is a dam in the French region Massif central, which opened in 1960. It was conceived by architects Henri et Louis Marty. It is located on the Truyère river, in the departement of Cantal, in between the communes of Fridefont et de Lavastrie.

Grandval Dam
Official nameBarrage de Grandval
CountryFrance
LocationLavastrie
Coordinates44°55′20.5″N 3°04′28.8″E / 44.922361°N 3.074667°E / 44.922361; 3.074667
Construction began1955
Opening date1960
Dam and spillways
Height (foundation)88m
Height (thalweg)76m
Length376m
Dam volume271m3