Reversible hydroelectric exploitation by means of two reservoirs to be constructed in the Mondego River in Girabolhos – Portugal (a 93.5 m high vault) and the equalizing reservoir of Girabolhos (concrete breakwater of 66.5 m). The main reversible installation (turbine pump) at the foot of the dam will have 335 MW of total installed power. A conventional installation uses the jump from the equalizing reservoir, with 29.50 MW of total power.